Hi,
Deconvolution is nothing new. There are two problems with deconvolution:
- the PSF is seldom known
- Deconvolution often causes ringing artefacts
There are cases where the PSF can be guessed. One is defocus. In this case PSF is a disk. That disk is somewhat affected by the way spherical aberration is corrected. The other case is diffraction, where a gaussian works well as a first order approximation.
The Smart Sharpen filter in PS in 'more accurate' mode uses deconvolution, with the above mentioned PFS called lens blur respectively gaussian blur. So for focusing errors you would use lens blur and for diffraction you would use gaussian blur.
There is something called blind deconvolution, where the PSF is not known, but estimated from the image itself.
There is a very good tool called Focus Magic the enclosed image was deconvolution sharpened in LR and Focus Magic was applied on the framed parts. Original image is an attempt to get infinite focus on a Distagon 40/4 FLE at small aperture (f/16 - f/22) on my P45+.
Erik, have you actual followed the link above and read what these guys are doing?
What you are telling me here is well known, I myself am using Topaz InFocus in its guessing mode.
What these guys do is something new:
They determine the PSFs across the whole image with a calibration shot beforehand.
You can use this calibration to remove aberrations after the image is taken.
You can, of course do this for every F-Stop.
And they do it differently, depending on the color channel.
Its not the usual way how deconvolution sharpening is applied, and I believe what they do makes sense and is new.
Its not meant to remove defocus errors after the fact though.
