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Original wavelet sharpen plugin from registry.gimp.org with compile fixes.
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README ====== The wavelet sharpen plugin increases apparent sharpness of an image. The amount of unsharpness in the original image can be taken into account. The plugin is not compareable to the builtin 'Sharpen' filter of the GIMP, however the results are simmilar to the ones with the builtin 'Unsharp mask' filter. LICENCE ------- Copyright (C) 2008 by Marco Rossini. Distributed under the General Public License GPLv2+. See the file COPYING which contains the license. INSTALLATION ------------ See the file INSTALL for instructions how to install the plugins. USAGE ----- There are two circumstances that makes it necessary to use the sharpen filter: 1. To reduce the effects due to aliasing of an picture which is in focus. a) Set the amount of sharpening using the slider. b) You may want to have the checkbox 'Sharpen luminance only' activated in order to avoid having colour artifacts (especially in noisy images). c) The sharpening radius can be left at 0.5. 2. To sharpen a picture which is out of focus. a) Set the amount of sharpening rather high (at first). b) Adjust the sharpening radius using the slider to choose the frequency part in the image which is to be increased in contrast. This means for blurred pictures you may want to set the value high (which sharpens slow- ly varying image features, leaving high frequency noise alone). Use low values if the image has many details. c) Set the sharpening amount back to a value that pleases your eye. d) You may want to have the checkbox 'Sharpen luminance only' activated in order to avoid having colour artifacts (especially in noisy images).