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Can deconvolution create new data? I thought it was just a way to upscale images.
by ibrarmalik 6y ago
Can deconvolution create new data? I thought it was just a way to upscale images.
- klyrs 6y agoIf a blur filter uses a convolution, then it's invertible through a deconvolution.
- im3w1l-alt 6y agoThere will be some information loss from edge effects and quantization noise. But mostly invertible.
- klyrs 6y agoYou're not wrong but invertible filters, noise or no, are simply not anonymizing and should not be used for that purpose.
- ivanbakel 6y agoDeconvolution is any attempt to recover data that has been passed through some known transformation. It can "create new data" because it is effectively mathematically-educated guesswork. In the case of upscaling an image, deconvolution involves looking for images which, when scaled down, resemble the original image being upscaled. That kind of pre-image approach can be applied to blur as well (if the blur process is deterministic).
- leni536 6y agoIt can't, but blurring might remove less data than what you want.
- chestervonwinch 6y agoI think you may be confusing deconvolution as the term is used in neural network literature with deconvolution as defined in mathematics/signal processing.