adjust_contrast

torchvision.transforms.functional.adjust_contrast(img: Tensor, contrast_factor: float) → Tensor

Adjust contrast of an image.

参数:

• img (PIL Image or Tensor) – Image to be adjusted. If img is torch Tensor, it is expected to be in […, 1 or 3, H, W] format, where … means it can have an arbitrary number of leading dimensions.

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

返回:

Contrast adjusted image.

返回类型:

PIL 图像或张量