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Wesam Khallaf
Author of PyTorch From Ground Up. Beginner PyTorch tutorials built from the tensor up — reshape, broadcasting, autograd. Free cheat-sheet: h
You passed a single image to your model and got ValueError: expected 4D input (got 3D input). Someone on Stack Overflow said "just add .unsqueeze(0)" — and it worked. But nobody explained what it did,
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