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> I think it is time for you to give it a second look.
I've looked at deconvolution sharpening...and it really only works really well when you can determine the precise point spread function (PSF). Smart Sharpen has the ability to do deconvolution sharpening but with only a single iteration.
Deconvolution correction was originally designed to correct for astral drift on long range telescopes where it's relatively easy to mathematically determine the PSF. It's much more difficult to determine the PSF for camera shake or subject movement with subject movement a bit easier to correct for than camera shake where movement may not be a single direction.
Contrary to removing camera shake blur (which none of us are discussing here), determining the PSF just for removing anti-alias blur is not very complicated or complex, as Smart Sharpen Lens Blur testifies. I wouldnt mind seeing Lens Blur deconvolution sharpening ´(including tonerange limiters) within ACR.
>"...their load on the CPU..."
I wondered the other day if GPUs are proficient for this sort of calculations...
I guess you could load lots of stuff onto GPUs (I don't know the specifics of what exactly). But already I never, ever, see my quad processor max out in Photoshop. Max I've seen has been around 80% developing (saving) several photos in ACR.
Not that I am proficient at it , but the ability to perform Fourier Transforms, Convolutions, Deconvolutions etc, already exist in Photoshop CS3 Extended ,as a connection to MatLab.
There is a folder inside the Photoshop Extended , Installation folder, that allows you to create a Photoshop Toolbox in MATLAB. This toolbox creates an easy to use workflow for scientist and researchers using MATLAB and Photoshop in combination. This is a set of MATLAB "m" files that expand MATLAB functions and allow MATLAB users to call Photoshop commands directly from the MATLAB command prompt. This enables the ability to get and set pixel values directly in MATLAB and then view the resulting image in either one.
For more info: