[PYTHON] I wrote Gray Scale in Pytorch

Background When I tried to Glay Scale with Pytorch, there was no Function, so I converted it to PIL once, Gray Scaled it, and then converted it back to Torch Tensor, so I thought it was a waste of calculation cost. Please support me as much as Gray Scale. .. ..

I'm sorry if there is

Code

By the way, it seems that there are various types of Gray Scale, so you can use your favorite parameters.

    def getGrayImage(self,rgbImg):
        gray = 0.114*rgbImg[:,0,:,:] + 0.587*rgbImg[:,1,:,:] + 0.299*rgbImg[:,2,:,:]
        gray = torch.unsqueeze(gray,1)
        return gray

Conclusion Please let me know if there is a GrayScale Function in Pytorch!

References Grayscale image prank https://qiita.com/yoya/items/96c36b069e74398796f3

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