Thanks 
I have separate channels, but I do not know how to show them like the above mentioned image. In my result all channels are in gray.
My Code:
import kornia
import torchvision
from torchvision.utils import save_image
img = torchvision.io.read_image('./kodak-dataset/kodim01.png')/255
img = kornia.color.rgb_to_ycbcr(img)
y, cr, cb = img.chunk(dim=-3, chunks=3)
save_image(y, f'./y.png')
save_image(cr, f'./cr.png')
save_image(cb, f'./cb.png')

the Output: