PixelZap removes "hot pixels" from digicam imagesCorrects hot pixels caused by long exposures, it will automatically detect, and correct hot pixels. Also corrects hot pixels caused by a defective or aging CCD and corrects only those pixels that are specified by the user. PixelZap uses low-level JPEG compression/decompression techniques to resave a JPEG image with essentially no image quality degradation. It also retains EXIF data in the corrected image, and its default detection and correction algorithms search for hot pixels in 2x2 clusters. This 2x2 clustering occurs because of the way color information is recorded by digital cameras, and allows PixelZap to accurately detect problem pixels, and lowers the chance of PixelZap falsely detecting bright points in the image that are not caused by hot-pixels. PixelZap is a command-line (DOS) program designed to be as small (approx. 130KB) and fast as possible. It is also available as a Windows program (PZapGUI) for those who prefer a graphical version. PixelZap and PZapGUI are released as shareware, but will operate for an unlimited time without registration. However, the unregistered versions are limited to processing images no larger than 640x480.
PixelZap removes "hot pixels" from digicam images