U-Net: Nearest-neighbour Upsampling
Beginner
The problem, from first principles
The U-Net decoder increases resolution step by step. A simple upsampling that copies each value into a block is cheap and avoids checkerboard artifacts from transposed convolutions.
From theory to code
Implement upsample_nearest(x, f), repeating each value into an f-by-f block.
Constraints
- Works on maps with extra channel axes.
Hints
Hint 1
Repeat along the height axis, then along the width axis.
Keywords
research-paperscomputer-visionsegmentationarchitecture
Python
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