(Up to the Homepage.)
It might not be obvious what settings to use to clean up your own images, so on this page I'll put some examples, which might help. Be warned! Some of these images will be big. (The thumbnails are of parts of the picture. Click to see the full image.)
All of the full-sized images were scanned in straight, without adjusting brightness, contrast or gamma, and saved with 100% quality. Apologies to the purists - it's true that 95% wouldn't have made much difference, but I don't want to be accused of cheating - I use all the information I can get when I deconvolve an image. The thumbnails are saved with 80% quality.
|This is the 160 kByte original of a disasterously shaken picture taken on a hazy day,||and here's the result. (12 pixels, automatic quality, 50 amplification - I use 8 pixels, automatic, 50 amplification by default, when I process images, but that can be excessive. ) I think the striations are from imperfections of the film - reducing the amplification or setting "portrait" quality gets rid of them, but you lose some of the fine detail.|
|This is a picture (140 kBytes) of a crowd scene from a festival - it's a good picture, honest, but I've blown it up to the point where it looks blurred. [If you really want to play, here's a version blown up twice as large, but it's 440 kBytes, and don't forget to set larger blur. Interesting characters you catch sometimes. Look under the "p"s of "Cappuccino". Respect to the guy.]||...and here's a cleaned up version, using my favourite settings (8 pixels, portrait because they're people, 50 amplification), except that, just to show what it does, I've set neutral colour.|
|Here is a picture which simply cannot be deconvolved neatly. First, the sky is overexposed and the dark parts of the boat are underexposed. (I have cut down the contrast to make the picture make sense at all.) Secondly, it has foreground which is in focus, and background which is out of focus. Thirdly, a lot of the background contains regular structures, the masts, which confuse the program (they are mistaken for vertical shake).||The best approach here is to point Unshake to the sort of re-focusing to be done. There is a region of background which is blurred, but does not contain masts, and is not underexposed. Save this clip in the source directory, and deconvolve it as best you can...|
...16 pixels, portrait, amplification 50 is used here, but the precise
settings are not critical. Now for the trick...
Select the full image, which is displayed in the source window, but instead of clicking on DeBlur, click on ReDraw. The full image will be drawn, using the blur deduced from the smaller clip.
|The result has the foreground over-sharpened, because it was originally sharp, and an inevitable halo around the underexposed regions, but in general, the parts of the picture which are in the same focal plane as the clip are sharpened - at least, enough to reveal the detail. You can change the amplification; it is now 100 for this picture.|