Focus Corrector
Have you ever had the experience abandoning a photo due to out of focus? It was a really good shutter chance but unfortunately with poor focus. If it had a good focus... Now this software Focus Corrector (for Windows 95/98/2000/XP/NT) can revive such photo with sharp focus! The method used here is a kind of convolution method which is common among other sharpening methods. The difference from other methods is in adjusting the points around the central point on the convolution matrix, not the central point itself, to strengthen the contrast of the image as illustrated below (mathematical note).
-1 -1 -1
-1  9 -1
-1 -1 -1
usual convolution (ex.)
   
-1/9 -1/9 -1/9
-1/9   1 -1/9
-1/9 -1/9 -1/9
convolution used here
   red: modified part
As described in the mathematical note, the iteration is available on this method, which is different from other convolution methods. Most of convolution methods using convolution matrix are abailable to iterate only twice or three times at most, because excessive iterations cause too exaggerated contrast and make the image rougher. While the iteration by the method described here surely converge to the focused image.

The following pictures are the image of Jupiter originally taken by Hubble Space Telescope (left) and its deconvoluted image (right) by Focus Corrector (parameters: focus depth=1.7, iterations=8).

    


As another example, the upper row of following picture is for the images of asteroid ITOKAWA taken by HAYABUSA probe (JAXA, Japan) and the lower row is for their deconvoluted images (parameters: focus depth=1.8, iterations=8).



For other examples, please visit Gallery (I), (II), (III) and (IV).

Thanks to Dr. T. V. Flandern, some results obtained from this software were introduced in the journal: Meta Research Bulletin (Vol. 14, No. 3. website: http://metaresearch.org).

For better focus on your photo, Focus Corrector will help you!
Focus Depth Level
1.0 (shallow) - 4.0 (deep)
No. of Iterations
1 - 10 (recommended)
Available File Type
bmp
Features
- Up to 700x500 pixels
- Save as bitmap file
Components
Focus Corrector (1.4Mb), User's Manual
Environment
Windows 9X/2000/XP
Price
US$49.85 
Limitations
N/A
Contact
HECO Ltd


Focus Corrector (screen shot)
You can try free version of Focus Corrector
Free Download Focus Corrector for Windows 95/98/2000/XP/NT (Trial)
(zipped: 1.4Mb)