mmengine.visualization.visualizer — mmengine 0.11.0rc0 documentation (original) (raw)
Copyright (c) OpenMMLab. All rights reserved.
import inspect import os.path as osp import warnings from typing import TYPE_CHECKING, Dict, List, Optional, Sequence, Tuple, Union
if TYPE_CHECKING: from matplotlib.font_manager import FontProperties
import cv2 import numpy as np import torch import torch.nn.functional as F
from mmengine.config import Config from mmengine.dist import master_only from mmengine.registry import VISBACKENDS, VISUALIZERS from mmengine.structures import BaseDataElement from mmengine.utils import ManagerMixin, is_seq_of from mmengine.visualization.utils import (check_type, check_type_and_length, color_str2rgb, color_val_matplotlib, convert_overlay_heatmap, img_from_canvas, tensor2ndarray, value2list, wait_continue) from mmengine.visualization.vis_backend import BaseVisBackend
VisBackendsType = Union[List[Union[List, BaseDataElement]], BaseDataElement, dict, None]
[docs]@VISUALIZERS.register_module()
class Visualizer(ManagerMixin):
"""MMEngine provides a Visualizer class that uses the Matplotlib
library as the backend. It has the following functions:
- Basic drawing methods
- draw_bboxes: draw single or multiple bounding boxes
- draw_texts: draw single or multiple text boxes
- draw_points: draw single or multiple points
- draw_lines: draw single or multiple line segments
- draw_circles: draw single or multiple circles
- draw_polygons: draw single or multiple polygons
- draw_binary_masks: draw single or multiple binary masks
- draw_featmap: draw feature map
- Basic visualizer backend methods
- add_configs: write config to all vis storage backends
- add_graph: write model graph to all vis storage backends
- add_image: write image to all vis storage backends
- add_scalar: write scalar to all vis storage backends
- add_scalars: write scalars to all vis storage backends
- add_datasample: write datasample to all vis storage \
backends. The abstract drawing interface used by the user
- Basic info methods
- set_image: sets the original image data
- get_image: get the image data in Numpy format after drawing
- show: visualization
- close: close all resources that have been opened
- get_backend: get the specified vis backend
All the basic drawing methods support chain calls, which is convenient for
overlaydrawing and display. Each downstream algorithm library can inherit
``Visualizer`` and implement the add_datasample logic. For example,
``DetLocalVisualizer`` in MMDetection inherits from ``Visualizer``
and implements functions, such as visual detection boxes, instance masks,
and semantic segmentation maps in the add_datasample interface.
Args:
name (str): Name of the instance. Defaults to 'visualizer'.
image (np.ndarray, optional): the origin image to draw. The format
should be RGB. Defaults to None.
vis_backends (list, optional): Visual backend config list.
Defaults to None.
save_dir (str, optional): Save file dir for all storage backends.
If it is None, the backend storage will not save any data.
fig_save_cfg (dict): Keyword parameters of figure for saving.
Defaults to empty dict.
fig_show_cfg (dict): Keyword parameters of figure for showing.
Defaults to empty dict.
Examples:
>>> # Basic info methods
>>> vis = Visualizer()
>>> vis.set_image(image)
>>> vis.get_image()
>>> vis.show()
>>> # Basic drawing methods
>>> vis = Visualizer(image=image)
>>> vis.draw_bboxes(np.array([0, 0, 1, 1]), edge_colors='g')
>>> vis.draw_bboxes(bbox=np.array([[1, 1, 2, 2], [2, 2, 3, 3]]),
>>> edge_colors=['g', 'r'])
>>> vis.draw_lines(x_datas=np.array([1, 3]),
>>> y_datas=np.array([1, 3]),
>>> colors='r', line_widths=1)
>>> vis.draw_lines(x_datas=np.array([[1, 3], [2, 4]]),
>>> y_datas=np.array([[1, 3], [2, 4]]),
>>> colors=['r', 'r'], line_widths=[1, 2])
>>> vis.draw_texts(text='MMEngine',
>>> position=np.array([2, 2]),
>>> colors='b')
>>> vis.draw_texts(text=['MMEngine','OpenMMLab'],
>>> position=np.array([[2, 2], [5, 5]]),
>>> colors=['b', 'b'])
>>> vis.draw_circles(circle_coord=np.array([2, 2]), radius=np.array[1])
>>> vis.draw_circles(circle_coord=np.array([[2, 2], [3, 5]),
>>> radius=np.array[1, 2], colors=['g', 'r'])
>>> square = np.array([[0, 0], [100, 0], [100, 100], [0, 100]])
>>> vis.draw_polygons(polygons=square, edge_colors='g')
>>> squares = [np.array([[0, 0], [100, 0], [100, 100], [0, 100]]),
>>> np.array([[0, 0], [50, 0], [50, 50], [0, 50]])]
>>> vis.draw_polygons(polygons=squares, edge_colors=['g', 'r'])
>>> vis.draw_binary_masks(binary_mask, alpha=0.6)
>>> heatmap = vis.draw_featmap(featmap, img,
>>> channel_reduction='select_max')
>>> heatmap = vis.draw_featmap(featmap, img, channel_reduction=None,
>>> topk=8, arrangement=(4, 2))
>>> heatmap = vis.draw_featmap(featmap, img, channel_reduction=None,
>>> topk=-1)
>>> # chain calls
>>> vis.draw_bboxes().draw_texts().draw_circle().draw_binary_masks()
>>> # Backend related methods
>>> vis = Visualizer(vis_backends=[dict(type='LocalVisBackend')],
>>> save_dir='temp_dir')
>>> cfg = Config(dict(a=1, b=dict(b1=[0, 1])))
>>> vis.add_config(cfg)
>>> image=np.random.randint(0, 256, size=(10, 10, 3)).astype(np.uint8)
>>> vis.add_image('image',image)
>>> vis.add_scaler('mAP', 0.6)
>>> vis.add_scalars({'loss': 0.1,'acc':0.8})
>>> # inherit
>>> class DetLocalVisualizer(Visualizer):
>>> def add_datasample(self,
>>> name,
>>> image: np.ndarray,
>>> gt_sample:
>>> Optional['BaseDataElement'] = None,
>>> pred_sample:
>>> Optional['BaseDataElement'] = None,
>>> draw_gt: bool = True,
>>> draw_pred: bool = True,
>>> show: bool = False,
>>> wait_time: int = 0,
>>> step: int = 0) -> None:
>>> pass
"""
def __init__(
self,
name='visualizer',
image: Optional[np.ndarray] = None,
vis_backends: VisBackendsType = None,
save_dir: Optional[str] = None,
fig_save_cfg=dict(frameon=False),
fig_show_cfg=dict(frameon=False)
) -> None:
super().__init__(name)
self._dataset_meta: Optional[dict] = None
self._vis_backends: Dict[str, BaseVisBackend] = {}
if vis_backends is None:
vis_backends = []
if isinstance(vis_backends, (dict, BaseVisBackend)):
vis_backends = [vis_backends] # type: ignore
if not is_seq_of(vis_backends, (dict, BaseVisBackend)):
raise TypeError('vis_backends must be a list of dicts or a list '
'of BaseBackend instances')
if save_dir is not None:
save_dir = osp.join(save_dir, 'vis_data')
for vis_backend in vis_backends: # type: ignore
name = None
if isinstance(vis_backend, dict):
name = vis_backend.pop('name', None)
vis_backend.setdefault('save_dir', save_dir)
vis_backend = VISBACKENDS.build(vis_backend)
# If vis_backend requires `save_dir` (with no default value)
# but is initialized with None, then don't add this
# vis_backend to the visualizer.
save_dir_arg = inspect.signature(
vis_backend.__class__.__init__).parameters.get('save_dir')
if (save_dir_arg is not None
and save_dir_arg.default is save_dir_arg.empty
and getattr(vis_backend, '_save_dir') is None):
warnings.warn(f'Failed to add {vis_backend.__class__}, '
'please provide the `save_dir` argument.')
continue
type_name = vis_backend.__class__.__name__
name = name or type_name
if name in self._vis_backends:
raise RuntimeError(f'vis_backend name {name} already exists')
self._vis_backends[name] = vis_backend # type: ignore
self.fig_save = None
self.fig_save_cfg = fig_save_cfg
self.fig_show_cfg = fig_show_cfg
(self.fig_save_canvas, self.fig_save,
self.ax_save) = self._initialize_fig(fig_save_cfg)
self.dpi = self.fig_save.get_dpi()
if image is not None:
self.set_image(image)
@property # type: ignore
@master_only
def dataset_meta(self) -> Optional[dict]:
"""Optional[dict]: Meta info of the dataset."""
return self._dataset_meta
@dataset_meta.setter # type: ignore
@master_only
def dataset_meta(self, dataset_meta: dict) -> None:
"""Set the dataset meta info to the Visualizer."""
self._dataset_meta = dataset_meta[docs] @master_only def show(self, drawn_img: Optional[np.ndarray] = None, win_name: str = 'image', wait_time: float = 0., continue_key: str = ' ', backend: str = 'matplotlib') -> None: """Show the drawn image.
Args:
drawn_img (np.ndarray, optional): The image to show. If drawn_img
is None, it will show the image got by Visualizer. Defaults
to None.
win_name (str): The image title. Defaults to 'image'.
wait_time (float): Delay in seconds. 0 is the special
value that means "forever". Defaults to 0.
continue_key (str): The key for users to continue. Defaults to
the space key.
backend (str): The backend to show the image. Defaults to
'matplotlib'. `New in version 0.7.3.`
"""
if backend == 'matplotlib':
import matplotlib.pyplot as plt
is_inline = 'inline' in plt.get_backend()
img = self.get_image() if drawn_img is None else drawn_img
self._init_manager(win_name)
fig = self.manager.canvas.figure
# remove white edges by set subplot margin
fig.subplots_adjust(left=0, right=1, bottom=0, top=1)
fig.clear()
ax = fig.add_subplot()
ax.axis(False)
ax.imshow(img)
self.manager.canvas.draw()
# Find a better way for inline to show the image
if is_inline:
return fig
wait_continue(fig, timeout=wait_time, continue_key=continue_key)
elif backend == 'cv2':
# Keep images are shown in the same window, and the title of window
# will be updated with `win_name`.
cv2.namedWindow(winname=f'{id(self)}')
cv2.setWindowTitle(f'{id(self)}', win_name)
cv2.imshow(
str(id(self)),
self.get_image() if drawn_img is None else drawn_img)
cv2.waitKey(int(np.ceil(wait_time * 1000)))
else:
raise ValueError('backend should be "matplotlib" or "cv2", '
f'but got {backend} instead')[docs] @master_only def set_image(self, image: np.ndarray) -> None: """Set the image to draw.
Args:
image (np.ndarray): The image to draw.
"""
assert image is not None
image = image.astype('uint8')
self._image = image
self.width, self.height = image.shape[1], image.shape[0]
self._default_font_size = max(
np.sqrt(self.height * self.width) // 90, 10)
# add a small 1e-2 to avoid precision lost due to matplotlib's
# truncation (https://github.com/matplotlib/matplotlib/issues/15363)
self.fig_save.set_size_inches( # type: ignore
(self.width + 1e-2) / self.dpi, (self.height + 1e-2) / self.dpi)
# self.canvas = mpl.backends.backend_cairo.FigureCanvasCairo(fig)
self.ax_save.cla()
self.ax_save.axis(False)
self.ax_save.imshow(
image,
extent=(0, self.width, self.height, 0),
interpolation='none')[docs] @master_only def get_image(self) -> np.ndarray: """Get the drawn image. The format is RGB.
Returns:
np.ndarray: the drawn image which channel is RGB.
"""
assert self._image is not None, 'Please set image using `set_image`'
return img_from_canvas(self.fig_save_canvas) # type: ignore
def _initialize_fig(self, fig_cfg) -> tuple:
"""Build figure according to fig_cfg.
Args:
fig_cfg (dict): The config to build figure.
Returns:
tuple: build canvas figure and axes.
"""
from matplotlib.backends.backend_agg import FigureCanvasAgg
from matplotlib.figure import Figure
fig = Figure(**fig_cfg)
ax = fig.add_subplot()
ax.axis(False)
# remove white edges by set subplot margin
fig.subplots_adjust(left=0, right=1, bottom=0, top=1)
canvas = FigureCanvasAgg(fig)
return canvas, fig, ax
def _init_manager(self, win_name: str) -> None:
"""Initialize the matplot manager.
Args:
win_name (str): The window name.
"""
from matplotlib.figure import Figure
from matplotlib.pyplot import new_figure_manager
if getattr(self, 'manager', None) is None:
self.manager = new_figure_manager(
num=1, FigureClass=Figure, **self.fig_show_cfg)
try:
self.manager.set_window_title(win_name)
except Exception:
self.manager = new_figure_manager(
num=1, FigureClass=Figure, **self.fig_show_cfg)
self.manager.set_window_title(win_name)[docs] @master_only def get_backend(self, name) -> 'BaseVisBackend': """Get vis backend by name.
Args:
name (str): The name of vis backend
Returns:
BaseVisBackend: The vis backend.
"""
return self._vis_backends.get(name) # type: ignore
def _is_posion_valid(self, position: np.ndarray) -> bool:
"""Judge whether the position is in image.
Args:
position (np.ndarray): The position to judge which last dim must
be two and the format is [x, y].
Returns:
bool: Whether the position is in image.
"""
flag = (position[..., 0] < self.width).all() and \
(position[..., 0] >= 0).all() and \
(position[..., 1] < self.height).all() and \
(position[..., 1] >= 0).all()
return flag[docs] @master_only def draw_points(self, positions: Union[np.ndarray, torch.Tensor], colors: Union[str, tuple, List[str], List[tuple]] = 'g', marker: Optional[str] = None, sizes: Optional[Union[np.ndarray, torch.Tensor]] = None): """Draw single or multiple points.
Args:
positions (Union[np.ndarray, torch.Tensor]): Positions to draw.
colors (Union[str, tuple, List[str], List[tuple]]): The colors
of points. ``colors`` can have the same length with points or
just single value. If ``colors`` is single value, all the
points will have the same colors. Reference to
https://matplotlib.org/stable/gallery/color/named_colors.html
for more details. Defaults to 'g.
marker (str, optional): The marker style.
See :mod:`matplotlib.markers` for more information about
marker styles. Defaults to None.
sizes (Optional[Union[np.ndarray, torch.Tensor]]): The marker size.
Defaults to None.
"""
check_type('positions', positions, (np.ndarray, torch.Tensor))
positions = tensor2ndarray(positions)
if len(positions.shape) == 1:
positions = positions[None]
assert positions.shape[-1] == 2, (
'The shape of `positions` should be (N, 2), '
f'but got {positions.shape}')
colors = color_val_matplotlib(colors) # type: ignore
self.ax_save.scatter(
positions[:, 0], positions[:, 1], c=colors, s=sizes, marker=marker)
return self[docs] @master_only def draw_texts( self, texts: Union[str, List[str]], positions: Union[np.ndarray, torch.Tensor], font_sizes: Optional[Union[int, List[int]]] = None, colors: Union[str, tuple, List[str], List[tuple]] = 'g', vertical_alignments: Union[str, List[str]] = 'top', horizontal_alignments: Union[str, List[str]] = 'left', font_families: Union[str, List[str]] = 'sans-serif', bboxes: Optional[Union[dict, List[dict]]] = None, font_properties: Optional[Union['FontProperties', List['FontProperties']]] = None ) -> 'Visualizer': """Draw single or multiple text boxes.
Args:
texts (Union[str, List[str]]): Texts to draw.
positions (Union[np.ndarray, torch.Tensor]): The position to draw
the texts, which should have the same length with texts and
each dim contain x and y.
font_sizes (Union[int, List[int]], optional): The font size of
texts. ``font_sizes`` can have the same length with texts or
just single value. If ``font_sizes`` is single value, all the
texts will have the same font size. Defaults to None.
colors (Union[str, tuple, List[str], List[tuple]]): The colors
of texts. ``colors`` can have the same length with texts or
just single value. If ``colors`` is single value, all the
texts will have the same colors. Reference to
https://matplotlib.org/stable/gallery/color/named_colors.html
for more details. Defaults to 'g.
vertical_alignments (Union[str, List[str]]): The verticalalignment
of texts. verticalalignment controls whether the y positional
argument for the text indicates the bottom, center or top side
of the text bounding box.
``vertical_alignments`` can have the same length with
texts or just single value. If ``vertical_alignments`` is
single value, all the texts will have the same
verticalalignment. verticalalignment can be 'center' or
'top', 'bottom' or 'baseline'. Defaults to 'top'.
horizontal_alignments (Union[str, List[str]]): The
horizontalalignment of texts. Horizontalalignment controls
whether the x positional argument for the text indicates the
left, center or right side of the text bounding box.
``horizontal_alignments`` can have
the same length with texts or just single value.
If ``horizontal_alignments`` is single value, all the texts
will have the same horizontalalignment. Horizontalalignment
can be 'center','right' or 'left'. Defaults to 'left'.
font_families (Union[str, List[str]]): The font family of
texts. ``font_families`` can have the same length with texts or
just single value. If ``font_families`` is single value, all
the texts will have the same font family.
font_familiy can be 'serif', 'sans-serif', 'cursive', 'fantasy'
or 'monospace'. Defaults to 'sans-serif'.
bboxes (Union[dict, List[dict]], optional): The bounding box of the
texts. If bboxes is None, there are no bounding box around
texts. ``bboxes`` can have the same length with texts or
just single value. If ``bboxes`` is single value, all
the texts will have the same bbox. Reference to
https://matplotlib.org/stable/api/_as_gen/matplotlib.patches.FancyBboxPatch.html#matplotlib.patches.FancyBboxPatch
for more details. Defaults to None.
font_properties (Union[FontProperties, List[FontProperties]], optional):
The font properties of texts. FontProperties is
a ``font_manager.FontProperties()`` object.
If you want to draw Chinese texts, you need to prepare
a font file that can show Chinese characters properly.
For example: `simhei.ttf`, `simsun.ttc`, `simkai.ttf` and so on.
Then set ``font_properties=matplotlib.font_manager.FontProperties(fname='path/to/font_file')``
``font_properties`` can have the same length with texts or
just single value. If ``font_properties`` is single value,
all the texts will have the same font properties.
Defaults to None.
`New in version 0.6.0.`
""" # noqa: E501
from matplotlib.font_manager import FontProperties
check_type('texts', texts, (str, list))
if isinstance(texts, str):
texts = [texts]
num_text = len(texts)
check_type('positions', positions, (np.ndarray, torch.Tensor))
positions = tensor2ndarray(positions)
if len(positions.shape) == 1:
positions = positions[None]
assert positions.shape == (num_text, 2), (
'`positions` should have the shape of '
f'({num_text}, 2), but got {positions.shape}')
if not self._is_posion_valid(positions):
warnings.warn(
'Warning: The text is out of bounds,'
' the drawn text may not be in the image', UserWarning)
positions = positions.tolist()
if font_sizes is None:
font_sizes = self._default_font_size
check_type_and_length('font_sizes', font_sizes, (int, float, list),
num_text)
font_sizes = value2list(font_sizes, (int, float), num_text)
check_type_and_length('colors', colors, (str, tuple, list), num_text)
colors = value2list(colors, (str, tuple), num_text)
colors = color_val_matplotlib(colors) # type: ignore
check_type_and_length('vertical_alignments', vertical_alignments,
(str, list), num_text)
vertical_alignments = value2list(vertical_alignments, str, num_text)
check_type_and_length('horizontal_alignments', horizontal_alignments,
(str, list), num_text)
horizontal_alignments = value2list(horizontal_alignments, str,
num_text)
check_type_and_length('font_families', font_families, (str, list),
num_text)
font_families = value2list(font_families, str, num_text)
if font_properties is None:
font_properties = [None for _ in range(num_text)] # type: ignore
else:
check_type_and_length('font_properties', font_properties,
(FontProperties, list), num_text)
font_properties = value2list(font_properties, FontProperties,
num_text)
if bboxes is None:
bboxes = [None for _ in range(num_text)] # type: ignore
else:
check_type_and_length('bboxes', bboxes, (dict, list), num_text)
bboxes = value2list(bboxes, dict, num_text)
for i in range(num_text):
self.ax_save.text(
positions[i][0],
positions[i][1],
texts[i],
size=font_sizes[i], # type: ignore
bbox=bboxes[i], # type: ignore
verticalalignment=vertical_alignments[i],
horizontalalignment=horizontal_alignments[i],
family=font_families[i],
fontproperties=font_properties[i],
color=colors[i])
return self[docs] @master_only def draw_lines( self, x_datas: Union[np.ndarray, torch.Tensor], y_datas: Union[np.ndarray, torch.Tensor], colors: Union[str, tuple, List[str], List[tuple]] = 'g', line_styles: Union[str, List[str]] = '-', line_widths: Union[Union[int, float], List[Union[int, float]]] = 2 ) -> 'Visualizer': """Draw single or multiple line segments.
Args:
x_datas (Union[np.ndarray, torch.Tensor]): The x coordinate of
each line' start and end points.
y_datas (Union[np.ndarray, torch.Tensor]): The y coordinate of
each line' start and end points.
colors (Union[str, tuple, List[str], List[tuple]]): The colors of
lines. ``colors`` can have the same length with lines or just
single value. If ``colors`` is single value, all the lines
will have the same colors. Reference to
https://matplotlib.org/stable/gallery/color/named_colors.html
for more details. Defaults to 'g'.
line_styles (Union[str, List[str]]): The linestyle
of lines. ``line_styles`` can have the same length with
texts or just single value. If ``line_styles`` is single
value, all the lines will have the same linestyle.
Reference to
https://matplotlib.org/stable/api/collections_api.html?highlight=collection#matplotlib.collections.AsteriskPolygonCollection.set_linestyle
for more details. Defaults to '-'.
line_widths (Union[Union[int, float], List[Union[int, float]]]):
The linewidth of lines. ``line_widths`` can have
the same length with lines or just single value.
If ``line_widths`` is single value, all the lines will
have the same linewidth. Defaults to 2.
"""
from matplotlib.collections import LineCollection
check_type('x_datas', x_datas, (np.ndarray, torch.Tensor))
x_datas = tensor2ndarray(x_datas)
check_type('y_datas', y_datas, (np.ndarray, torch.Tensor))
y_datas = tensor2ndarray(y_datas)
assert x_datas.shape == y_datas.shape, (
'`x_datas` and `y_datas` should have the same shape')
assert x_datas.shape[-1] == 2, (
f'The shape of `x_datas` should be (N, 2), but got {x_datas.shape}'
)
if len(x_datas.shape) == 1:
x_datas = x_datas[None]
y_datas = y_datas[None]
colors = color_val_matplotlib(colors) # type: ignore
lines = np.concatenate(
(x_datas.reshape(-1, 2, 1), y_datas.reshape(-1, 2, 1)), axis=-1)
if not self._is_posion_valid(lines):
warnings.warn(
'Warning: The line is out of bounds,'
' the drawn line may not be in the image', UserWarning)
line_collect = LineCollection(
lines.tolist(),
colors=colors,
linestyles=line_styles,
linewidths=line_widths)
self.ax_save.add_collection(line_collect)
return self[docs] @master_only def draw_circles( self, center: Union[np.ndarray, torch.Tensor], radius: Union[np.ndarray, torch.Tensor], edge_colors: Union[str, tuple, List[str], List[tuple]] = 'g', line_styles: Union[str, List[str]] = '-', line_widths: Union[Union[int, float], List[Union[int, float]]] = 2, face_colors: Union[str, tuple, List[str], List[tuple]] = 'none', alpha: Union[float, int] = 0.8, ) -> 'Visualizer': """Draw single or multiple circles.
Args:
center (Union[np.ndarray, torch.Tensor]): The x coordinate of
each line' start and end points.
radius (Union[np.ndarray, torch.Tensor]): The y coordinate of
each line' start and end points.
edge_colors (Union[str, tuple, List[str], List[tuple]]): The
colors of circles. ``colors`` can have the same length with
lines or just single value. If ``colors`` is single value,
all the lines will have the same colors. Reference to
https://matplotlib.org/stable/gallery/color/named_colors.html
for more details. Defaults to 'g.
line_styles (Union[str, List[str]]): The linestyle
of lines. ``line_styles`` can have the same length with
texts or just single value. If ``line_styles`` is single
value, all the lines will have the same linestyle.
Reference to
https://matplotlib.org/stable/api/collections_api.html?highlight=collection#matplotlib.collections.AsteriskPolygonCollection.set_linestyle
for more details. Defaults to '-'.
line_widths (Union[Union[int, float], List[Union[int, float]]]):
The linewidth of lines. ``line_widths`` can have
the same length with lines or just single value.
If ``line_widths`` is single value, all the lines will
have the same linewidth. Defaults to 2.
face_colors (Union[str, tuple, List[str], List[tuple]]):
The face colors. Defaults to None.
alpha (Union[int, float]): The transparency of circles.
Defaults to 0.8.
"""
from matplotlib.collections import PatchCollection
from matplotlib.patches import Circle
check_type('center', center, (np.ndarray, torch.Tensor))
center = tensor2ndarray(center)
check_type('radius', radius, (np.ndarray, torch.Tensor))
radius = tensor2ndarray(radius)
if len(center.shape) == 1:
center = center[None]
assert center.shape == (radius.shape[0], 2), (
'The shape of `center` should be (radius.shape, 2), '
f'but got {center.shape}')
if not (self._is_posion_valid(center -
np.tile(radius.reshape((-1, 1)), (1, 2)))
and self._is_posion_valid(
center + np.tile(radius.reshape((-1, 1)), (1, 2)))):
warnings.warn(
'Warning: The circle is out of bounds,'
' the drawn circle may not be in the image', UserWarning)
center = center.tolist()
radius = radius.tolist()
edge_colors = color_val_matplotlib(edge_colors) # type: ignore
face_colors = color_val_matplotlib(face_colors) # type: ignore
circles = []
for i in range(len(center)):
circles.append(Circle(tuple(center[i]), radius[i]))
if isinstance(line_widths, (int, float)):
line_widths = [line_widths] * len(circles)
line_widths = [
min(max(linewidth, 1), self._default_font_size / 4)
for linewidth in line_widths
]
p = PatchCollection(
circles,
alpha=alpha,
facecolors=face_colors,
edgecolors=edge_colors,
linewidths=line_widths,
linestyles=line_styles)
self.ax_save.add_collection(p)
return self[docs] @master_only def draw_bboxes( self, bboxes: Union[np.ndarray, torch.Tensor], edge_colors: Union[str, tuple, List[str], List[tuple]] = 'g', line_styles: Union[str, List[str]] = '-', line_widths: Union[Union[int, float], List[Union[int, float]]] = 2, face_colors: Union[str, tuple, List[str], List[tuple]] = 'none', alpha: Union[int, float] = 0.8, ) -> 'Visualizer': """Draw single or multiple bboxes.
Args:
bboxes (Union[np.ndarray, torch.Tensor]): The bboxes to draw with
the format of(x1,y1,x2,y2).
edge_colors (Union[str, tuple, List[str], List[tuple]]): The
colors of bboxes. ``colors`` can have the same length with
lines or just single value. If ``colors`` is single value, all
the lines will have the same colors. Refer to `matplotlib.
colors` for full list of formats that are accepted.
Defaults to 'g'.
line_styles (Union[str, List[str]]): The linestyle
of lines. ``line_styles`` can have the same length with
texts or just single value. If ``line_styles`` is single
value, all the lines will have the same linestyle.
Reference to
https://matplotlib.org/stable/api/collections_api.html?highlight=collection#matplotlib.collections.AsteriskPolygonCollection.set_linestyle
for more details. Defaults to '-'.
line_widths (Union[Union[int, float], List[Union[int, float]]]):
The linewidth of lines. ``line_widths`` can have
the same length with lines or just single value.
If ``line_widths`` is single value, all the lines will
have the same linewidth. Defaults to 2.
face_colors (Union[str, tuple, List[str], List[tuple]]):
The face colors. Defaults to None.
alpha (Union[int, float]): The transparency of bboxes.
Defaults to 0.8.
"""
check_type('bboxes', bboxes, (np.ndarray, torch.Tensor))
bboxes = tensor2ndarray(bboxes)
if len(bboxes.shape) == 1:
bboxes = bboxes[None]
assert bboxes.shape[-1] == 4, (
f'The shape of `bboxes` should be (N, 4), but got {bboxes.shape}')
assert (bboxes[:, 0] <= bboxes[:, 2]).all() and (bboxes[:, 1] <=
bboxes[:, 3]).all()
if not self._is_posion_valid(bboxes.reshape((-1, 2, 2))):
warnings.warn(
'Warning: The bbox is out of bounds,'
' the drawn bbox may not be in the image', UserWarning)
poly = np.stack(
(bboxes[:, 0], bboxes[:, 1], bboxes[:, 2], bboxes[:, 1],
bboxes[:, 2], bboxes[:, 3], bboxes[:, 0], bboxes[:, 3]),
axis=-1).reshape(-1, 4, 2)
poly = [p for p in poly]
return self.draw_polygons(
poly,
alpha=alpha,
edge_colors=edge_colors,
line_styles=line_styles,
line_widths=line_widths,
face_colors=face_colors)[docs] @master_only def draw_polygons( self, polygons: Union[Union[np.ndarray, torch.Tensor], List[Union[np.ndarray, torch.Tensor]]], edge_colors: Union[str, tuple, List[str], List[tuple]] = 'g', line_styles: Union[str, List[str]] = '-', line_widths: Union[Union[int, float], List[Union[int, float]]] = 2, face_colors: Union[str, tuple, List[str], List[tuple]] = 'none', alpha: Union[int, float] = 0.8, ) -> 'Visualizer': """Draw single or multiple bboxes.
Args:
polygons (Union[Union[np.ndarray, torch.Tensor],\
List[Union[np.ndarray, torch.Tensor]]]): The polygons to draw
with the format of (x1,y1,x2,y2,...,xn,yn).
edge_colors (Union[str, tuple, List[str], List[tuple]]): The
colors of polygons. ``colors`` can have the same length with
lines or just single value. If ``colors`` is single value,
all the lines will have the same colors. Refer to
`matplotlib.colors` for full list of formats that are accepted.
Defaults to 'g.
line_styles (Union[str, List[str]]): The linestyle
of lines. ``line_styles`` can have the same length with
texts or just single value. If ``line_styles`` is single
value, all the lines will have the same linestyle.
Reference to
https://matplotlib.org/stable/api/collections_api.html?highlight=collection#matplotlib.collections.AsteriskPolygonCollection.set_linestyle
for more details. Defaults to '-'.
line_widths (Union[Union[int, float], List[Union[int, float]]]):
The linewidth of lines. ``line_widths`` can have
the same length with lines or just single value.
If ``line_widths`` is single value, all the lines will
have the same linewidth. Defaults to 2.
face_colors (Union[str, tuple, List[str], List[tuple]]):
The face colors. Defaults to None.
alpha (Union[int, float]): The transparency of polygons.
Defaults to 0.8.
"""
from matplotlib.collections import PolyCollection
check_type('polygons', polygons, (list, np.ndarray, torch.Tensor))
edge_colors = color_val_matplotlib(edge_colors) # type: ignore
face_colors = color_val_matplotlib(face_colors) # type: ignore
if isinstance(polygons, (np.ndarray, torch.Tensor)):
polygons = [polygons]
if isinstance(polygons, list):
for polygon in polygons:
assert polygon.shape[1] == 2, (
'The shape of each polygon in `polygons` should be (M, 2),'
f' but got {polygon.shape}')
polygons = [tensor2ndarray(polygon) for polygon in polygons]
for polygon in polygons:
if not self._is_posion_valid(polygon):
warnings.warn(
'Warning: The polygon is out of bounds,'
' the drawn polygon may not be in the image', UserWarning)
if isinstance(line_widths, (int, float)):
line_widths = [line_widths] * len(polygons)
line_widths = [
min(max(linewidth, 1), self._default_font_size / 4)
for linewidth in line_widths
]
polygon_collection = PolyCollection(
polygons,
alpha=alpha,
facecolor=face_colors,
linestyles=line_styles,
edgecolors=edge_colors,
linewidths=line_widths)
self.ax_save.add_collection(polygon_collection)
return self[docs] @master_only def draw_binary_masks( self, binary_masks: Union[np.ndarray, torch.Tensor], colors: Union[str, tuple, List[str], List[tuple]] = 'g', alphas: Union[float, List[float]] = 0.8) -> 'Visualizer': """Draw single or multiple binary masks.
Args:
binary_masks (np.ndarray, torch.Tensor): The binary_masks to draw
with of shape (N, H, W), where H is the image height and W is
the image width. Each value in the array is either a 0 or 1
value of uint8 type.
colors (np.ndarray): The colors which binary_masks will convert to.
``colors`` can have the same length with binary_masks or just
single value. If ``colors`` is single value, all the
binary_masks will convert to the same colors. The colors format
is RGB. Defaults to np.array([0, 255, 0]).
alphas (Union[int, List[int]]): The transparency of masks.
Defaults to 0.8.
"""
check_type('binary_masks', binary_masks, (np.ndarray, torch.Tensor))
binary_masks = tensor2ndarray(binary_masks)
assert binary_masks.dtype == np.bool_, (
'The dtype of binary_masks should be np.bool_, '
f'but got {binary_masks.dtype}')
binary_masks = binary_masks.astype('uint8') * 255
img = self.get_image()
if binary_masks.ndim == 2:
binary_masks = binary_masks[None]
assert img.shape[:2] == binary_masks.shape[
1:], '`binary_masks` must have ' \
'the same shape with image'
binary_mask_len = binary_masks.shape[0]
check_type_and_length('colors', colors, (str, tuple, list),
binary_mask_len)
colors = value2list(colors, (str, tuple), binary_mask_len)
colors = [
color_str2rgb(color) if isinstance(color, str) else color
for color in colors
]
for color in colors:
assert len(color) == 3
for channel in color:
assert 0 <= channel <= 255 # type: ignore
if isinstance(alphas, float):
alphas = [alphas] * binary_mask_len
for binary_mask, color, alpha in zip(binary_masks, colors, alphas):
binary_mask_complement = cv2.bitwise_not(binary_mask)
rgb = np.zeros_like(img)
rgb[...] = color
rgb = cv2.bitwise_and(rgb, rgb, mask=binary_mask)
img_complement = cv2.bitwise_and(
img, img, mask=binary_mask_complement)
rgb = rgb + img_complement
img = cv2.addWeighted(img, 1 - alpha, rgb, alpha, 0)
self.ax_save.imshow(
img,
extent=(0, self.width, self.height, 0),
interpolation='nearest')
return self[docs] @staticmethod @master_only def draw_featmap(featmap: torch.Tensor, overlaid_image: Optional[np.ndarray] = None, channel_reduction: Optional[str] = 'squeeze_mean', topk: int = 20, arrangement: Tuple[int, int] = (4, 5), resize_shape: Optional[tuple] = None, alpha: float = 0.5) -> np.ndarray: """Draw featmap.
- If `overlaid_image` is not None, the final output image will be the
weighted sum of img and featmap.
- If `resize_shape` is specified, `featmap` and `overlaid_image`
are interpolated.
- If `resize_shape` is None and `overlaid_image` is not None,
the feature map will be interpolated to the spatial size of the image
in the case where the spatial dimensions of `overlaid_image` and
`featmap` are different.
- If `channel_reduction` is "squeeze_mean" and "select_max",
it will compress featmap to single channel image and weighted
sum to `overlaid_image`.
- If `channel_reduction` is None
- If topk <= 0, featmap is assert to be one or three
channel and treated as image and will be weighted sum
to ``overlaid_image``.
- If topk > 0, it will select topk channel to show by the sum of
each channel. At the same time, you can specify the `arrangement`
to set the window layout.
Args:
featmap (torch.Tensor): The featmap to draw which format is
(C, H, W).
overlaid_image (np.ndarray, optional): The overlaid image.
Defaults to None.
channel_reduction (str, optional): Reduce multiple channels to a
single channel. The optional value is 'squeeze_mean'
or 'select_max'. Defaults to 'squeeze_mean'.
topk (int): If channel_reduction is not None and topk > 0,
it will select topk channel to show by the sum of each channel.
if topk <= 0, tensor_chw is assert to be one or three.
Defaults to 20.
arrangement (Tuple[int, int]): The arrangement of featmap when
channel_reduction is None and topk > 0. Defaults to (4, 5).
resize_shape (tuple, optional): The shape to scale the feature map.
Defaults to None.
alpha (Union[int, List[int]]): The transparency of featmap.
Defaults to 0.5.
Returns:
np.ndarray: RGB image.
"""
import matplotlib.pyplot as plt
assert isinstance(featmap,
torch.Tensor), (f'`featmap` should be torch.Tensor,'
f' but got {type(featmap)}')
assert featmap.ndim == 3, f'Input dimension must be 3, ' \
f'but got {featmap.ndim}'
featmap = featmap.detach().cpu()
if overlaid_image is not None:
if overlaid_image.ndim == 2:
overlaid_image = cv2.cvtColor(overlaid_image,
cv2.COLOR_GRAY2RGB)
if overlaid_image.shape[:2] != featmap.shape[1:]:
warnings.warn(
f'Since the spatial dimensions of '
f'overlaid_image: {overlaid_image.shape[:2]} and '
f'featmap: {featmap.shape[1:]} are not same, '
f'the feature map will be interpolated. '
f'This may cause mismatch problems !')
if resize_shape is None:
featmap = F.interpolate(
featmap[None],
overlaid_image.shape[:2],
mode='bilinear',
align_corners=False)[0]
if resize_shape is not None:
featmap = F.interpolate(
featmap[None],
resize_shape,
mode='bilinear',
align_corners=False)[0]
if overlaid_image is not None:
overlaid_image = cv2.resize(overlaid_image, resize_shape[::-1])
if channel_reduction is not None:
assert channel_reduction in [
'squeeze_mean', 'select_max'], \
f'Mode only support "squeeze_mean", "select_max", ' \
f'but got {channel_reduction}'
if channel_reduction == 'select_max':
sum_channel_featmap = torch.sum(featmap, dim=(1, 2))
_, indices = torch.topk(sum_channel_featmap, 1)
feat_map = featmap[indices]
else:
feat_map = torch.mean(featmap, dim=0)
return convert_overlay_heatmap(feat_map, overlaid_image, alpha)
elif topk <= 0:
featmap_channel = featmap.shape[0]
assert featmap_channel in [
1, 3
], ('The input tensor channel dimension must be 1 or 3 '
'when topk is less than 1, but the channel '
f'dimension you input is {featmap_channel}, you can use the'
' channel_reduction parameter or set topk greater than '
'0 to solve the error')
return convert_overlay_heatmap(featmap, overlaid_image, alpha)
else:
row, col = arrangement
channel, height, width = featmap.shape
assert row * col >= topk, 'The product of row and col in ' \
'the `arrangement` is less than ' \
'topk, please set the ' \
'`arrangement` correctly'
# Extract the feature map of topk
topk = min(channel, topk)
sum_channel_featmap = torch.sum(featmap, dim=(1, 2))
_, indices = torch.topk(sum_channel_featmap, topk)
topk_featmap = featmap[indices]
fig = plt.figure(frameon=False)
# Set the window layout
fig.subplots_adjust(
left=0, right=1, bottom=0, top=1, wspace=0, hspace=0)
dpi = fig.get_dpi()
fig.set_size_inches((width * col + 1e-2) / dpi,
(height * row + 1e-2) / dpi)
for i in range(topk):
axes = fig.add_subplot(row, col, i + 1)
axes.axis('off')
axes.text(2, 15, f'channel: {indices[i]}', fontsize=10)
axes.imshow(
convert_overlay_heatmap(topk_featmap[i], overlaid_image,
alpha))
image = img_from_canvas(fig.canvas)
plt.close(fig)
return image[docs] @master_only def add_config(self, config: Config, **kwargs): """Record the config.
Args:
config (Config): The Config object.
"""
for vis_backend in self._vis_backends.values():
vis_backend.add_config(config, **kwargs)[docs] @master_only def add_graph(self, model: torch.nn.Module, data_batch: Sequence[dict], **kwargs) -> None: """Record the model graph.
Args:
model (torch.nn.Module): Model to draw.
data_batch (Sequence[dict]): Batch of data from dataloader.
"""
for vis_backend in self._vis_backends.values():
vis_backend.add_graph(model, data_batch, **kwargs)[docs] @master_only def add_image(self, name: str, image: np.ndarray, step: int = 0) -> None: """Record the image.
Args:
name (str): The image identifier.
image (np.ndarray, optional): The image to be saved. The format
should be RGB. Defaults to None.
step (int): Global step value to record. Defaults to 0.
"""
for vis_backend in self._vis_backends.values():
vis_backend.add_image(name, image, step) # type: ignore[docs] @master_only def add_scalar(self, name: str, value: Union[int, float], step: int = 0, **kwargs) -> None: """Record the scalar data.
Args:
name (str): The scalar identifier.
value (float, int): Value to save.
step (int): Global step value to record. Defaults to 0.
"""
for vis_backend in self._vis_backends.values():
vis_backend.add_scalar(name, value, step, **kwargs) # type: ignore[docs] @master_only def add_scalars(self, scalar_dict: dict, step: int = 0, file_path: Optional[str] = None, **kwargs) -> None: """Record the scalars' data.
Args:
scalar_dict (dict): Key-value pair storing the tag and
corresponding values.
step (int): Global step value to record. Defaults to 0.
file_path (str, optional): The scalar's data will be
saved to the `file_path` file at the same time
if the `file_path` parameter is specified.
Defaults to None.
"""
for vis_backend in self._vis_backends.values():
vis_backend.add_scalars(scalar_dict, step, file_path, **kwargs)[docs] @master_only def add_datasample(self, name, image: np.ndarray, data_sample: Optional['BaseDataElement'] = None, draw_gt: bool = True, draw_pred: bool = True, show: bool = False, wait_time: int = 0, step: int = 0) -> None: """Draw datasample.""" pass
[docs] def close(self) -> None: """Close an opened object.""" for vis_backend in self._vis_backends.values(): vis_backend.close()
[docs] @classmethod
def get_instance(cls, name: str, **kwargs) -> 'Visualizer':
"""Make subclass can get latest created instance by
Visualizer.get_current_instance().
Downstream codebase may need to get the latest created instance
without knowing the specific Visualizer type. For example, mmdetection
builds visualizer in runner and some component which cannot access
runner wants to get latest created visualizer. In this case,
the component does not know which type of visualizer has been built
and cannot get target instance. Therefore, :class:`Visualizer`
overrides the :meth:`get_instance` and its subclass will register
the created instance to :attr:`_instance_dict` additionally.
:meth:`get_current_instance` will return the latest created subclass
instance.
Examples:
>>> class DetLocalVisualizer(Visualizer):
>>> def __init__(self, name):
>>> super().__init__(name)
>>>
>>> visualizer1 = DetLocalVisualizer.get_instance('name1')
>>> visualizer2 = Visualizer.get_current_instance()
>>> visualizer3 = DetLocalVisualizer.get_current_instance()
>>> assert id(visualizer1) == id(visualizer2) == id(visualizer3)
Args:
name (str): Name of instance.
Returns:
object: Corresponding name instance.
"""
instance = super().get_instance(name, **kwargs)
Visualizer._instance_dict[name] = instance
return instance