sklearn.datasets.fetch_lfw_people — scikit-learn 0.20.4 documentation (original) (raw)
sklearn.datasets. fetch_lfw_people(data_home=None, funneled=True, resize=0.5, min_faces_per_person=0, color=False, slice_=(slice(70, 195, None), slice(78, 172, None)), download_if_missing=True, return_X_y=False)[source]¶
Load the Labeled Faces in the Wild (LFW) people dataset (classification).
Download it if necessary.
| Classes | 5749 |
|---|---|
| Samples total | 13233 |
| Dimensionality | 5828 |
| Features | real, between 0 and 255 |
Read more in the User Guide.
| Parameters: | data_home : optional, default: None Specify another download and cache folder for the datasets. By default all scikit-learn data is stored in ‘~/scikit_learn_data’ subfolders. funneled : boolean, optional, default: True Download and use the funneled variant of the dataset. resize : float, optional, default 0.5 Ratio used to resize the each face picture. min_faces_per_person : int, optional, default None The extracted dataset will only retain pictures of people that have at least min_faces_per_person different pictures. color : boolean, optional, default False Keep the 3 RGB channels instead of averaging them to a single gray level channel. If color is True the shape of the data has one more dimension than the shape with color = False. slice_ : optional Provide a custom 2D slice (height, width) to extract the ‘interesting’ part of the jpeg files and avoid use statistical correlation from the background download_if_missing : optional, True by default If False, raise a IOError if the data is not locally available instead of trying to download the data from the source site. return_X_y : boolean, default=False. If True, returns (dataset.data, dataset.target) instead of a Bunch object. See below for more information about the dataset.data anddataset.target object. New in version 0.20. |
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| Returns: | dataset : dict-like object with the following attributes: dataset.data : numpy array of shape (13233, 2914) Each row corresponds to a ravelled face image of original size 62 x 47 pixels. Changing the slice_ or resize parameters will change the shape of the output. dataset.images : numpy array of shape (13233, 62, 47) Each row is a face image corresponding to one of the 5749 people in the dataset. Changing the slice_ or resize parameters will change the shape of the output. dataset.target : numpy array of shape (13233,) Labels associated to each face image. Those labels range from 0-5748 and correspond to the person IDs. dataset.DESCR : string Description of the Labeled Faces in the Wild (LFW) dataset. (data, target) : tuple if return_X_y is True New in version 0.20. |