to_grayscale¶
- torchvision.transforms.functional.to_grayscale(img, num_output_channels=1)[source]¶
Convert PIL image of any mode (RGB, HSV, LAB, etc) to grayscale version of image. This transform does not support torch Tensor.
- Parameters:
img (PIL Image) – PIL Image to be converted to grayscale.
num_output_channels (int) – number of channels of the output image. Value can be 1 or 3. Default is 1.
- Returns:
Grayscale version of the image.
if num_output_channels = 1 : returned image is single channel
if num_output_channels = 3 : returned image is 3 channel with r = g = b
- Return type:
PIL Image
Examples using
to_grayscale:
