Vips.Image.jp2ksave (original) (raw)

Method

Vips Imagejp2ksave

Declaration [src]


int
vips_jp2ksave (
  VipsImage* in,
  const char* filename,
  ...
)

Description [src]

Write a VIPS image to a file in JPEG2000 format.

The saver supports 8, 16 and 32-bit int pixel values, signed and unsigned. It supports greyscale, RGB, CMYK and multispectral images.

Use Q to set the compression quality factor. The default value produces file with approximately the same size as regular JPEG Q 75.

Set lossless to enable lossless compression.

Use tile_width and tile_height to set the tile size. The default is 512.

Chroma subsampling is normally disabled for compatibility. Setsubsample_mode to auto to enable chroma subsample for Q < 90. Subsample mode uses YCC rather than RGB colourspace, and many jpeg2000 decoders do not support this.

This operation always writes a pyramid.

Optional arguments

Q: gint, quality factor
lossless: gboolean, enables lossless compression
tile_width: gint, tile width
tile_height: gint, tile width
subsample_mode: VipsForeignSubsample, chroma subsampling mode

This method is not directly available to language bindings.

Parameters

filename

Type: const char*

File to write to.

The data is owned by the caller of the method.
The value is a NUL terminated UTF-8 string.

...

Type: ``

NULL-terminated list of optional named arguments.

Return value

Type: int

0 on success, -1 on error.

Vips.Image.jp2ksave (original) (raw)

Method