Two things called deconvolution

Deconvolution means two different things, and you must keep them separate:

1. Transposed convolution — the upsampling layer in a decoder or GAN. It makes things bigger. It is not a true inverse; the name is historical and misleading.
2. True deconvolution — recovering the original signal from a blurred one. This is a genuine inverse problem, and it is where section 07 comes back.

In biotech the second is routine. Every fluorescence microscope blurs its images by a known amount — the point spread function — and deconvolution is standard practice before cells are counted or measured.