mindspore.dataset.vision.AdjustContrast

class mindspore.dataset.vision.AdjustContrast(contrast_factor)[source]

Adjust the contrast of the input image.

Parameters

contrast_factor (float) – How much to adjust the contrast, must be non negative. 0 gives a solid gray image, 1 gives the original image, while 2 increases the contrast by a factor of 2.

Raises

  • TypeError – If contrast_factor is not of type float.

  • ValueError – If contrast_factor is less than 0.

  • RuntimeError – If shape of the input image is not <H, W, C>.

Supported Platforms:

CPU

Examples

>>> import mindspore.dataset as ds
>>> import mindspore.dataset.vision as vision
>>>
>>> image_folder_dataset = ds.ImageFolderDataset("/path/to/image_folder_dataset_directory")
>>> transforms_list = [vision.Decode(), vision.AdjustContrast(contrast_factor=2.0)]
>>> image_folder_dataset = image_folder_dataset.map(operations=transforms_list,
...                                                 input_columns=["image"])
Tutorial Examples: