I have a 224x224 binary image in a tensor (1, 224, 224), with 0-pixels representing background a 1-pixels representing foreground. I want to reshape it in a tensor (2, 224, 224), such as the first “layer” gt has 1-pixels where there were 0-pixels in the original image and viceversa. This way one layer should show 1s where there is background and the other one will have 1s on the foreground (basically I need to have two complementary binary images in this tensor).
This is my code:
# gt is a tensor (1, 224, 224) gt = gt.expand((2, 224, 224)) backgr = gt foregr = gt backgr[backgr == 0] = 2 # swap all 0s in 1s and viceversa backgr[backgr == 1] = 0 backgr[backgr == 2] = 1 gt = backgr print(gt) print(gt)
The problem is both layers are modified with this code and I can’t figure out how to keep one of the two constant and change only gt.