COMPANY: Shapiro Consulting Group | URL: www.asiva.com | TYPE: Plug-in | PLATFORM: Mac, Windows | PRICE: $39
		The Asiva® JPEG Deblocker Plug-in prepares a JPEG file for subsequent image enhancement by smoothing out the blocks in low saturation high luminance areas while preserving detail in the rest of the image, so you should run this plug-in on a JPEG file before doing anything else. You may not notice any visible change after running the plug-in, but will upon performing additional color editing. The JPEG algorithm attempts to compress images in such a way that storage requirements are minimized while keeping the image perceptually undistorted as much as possible. This is accomplished by finding regions in the image that have a low amount of detail and lumping those pixels into 16 x 16 square pixel blocks that will have the same color information. Because the human eye is far more sensitive to changes in luminance than in color (chrominance), JPEG uses much more compression for chrominance values than for luminance. This optimizes the compression with minimal visible degradation. We should try to avoid using JPEG compressed files to enhance, and create them only as an output file permutation for e-mail or WEB, however sometimes they are the only existing version to work with. The problem of JPEG blocks manifests itself when we attempt to manipulate the color information with some sort of filter or operation. Let's just say that we want to make the image more vivid by increasing saturation and luminance where they are lacking. Important Note: You are going to have to either step backwards in your Photoshop History, or close the source JPEG image without saving and reopen it, because you DO NOT want to alter the source JPEG image in any way before Deblocking it with Asiva. After running the Asiva JPEG Deblocker plug-in. Note you cannot really see any difference, and you will not be able to necessarily tell that the plug-in did anything until you perform another filter or operation.