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Save for Web allows to find compromise between minimal file size and acceptable quality of image quickly. While adjusting various settings, you may explore how image quality and file size change. Options to reduce file size of an image include setting compression quality, number or colors, resizing, cropping, Exif information removal, etc.

[ edited version of author's www site ] This plugin losslessly decomposes a layer of an image into layers of wavelet scales. This means that you can edit the image on different detail scales (frequencies). The trivial recomposition of the image can be done by GIMP's layer modes so you can see the results of your modifications instantly. Among the applications are retouching, noise reduction, and enhancing global contrast. The plugin can be found under "Filters > Generic > Wavelet decompose"

The wavelet denoise plugin is a tool to reduce noise in each channel of an image separately. The default colour space to do denoising is YCbCr which has the advantage that chroma noise can be reduced without affecting image details. Denoising in CIELAB (L*a*b*) or RGB is available as an option. The user interface allows colour mode and preview channel selection. The denoising threshold can be set for each colour channel independently. The plugin can be found under "Filters > Enhance > Wavelet denoise"

The wavelet decomposition of an image results in multiple images with different frequency content. When amplifying the high frequency parts the recomposed image appears to be sharper than the original one. That way the frequency which should be amplified most can also be selected and a given unsharpness in the original image can be taken into account. The wavelet sharpen plugin enhances apparent sharpness of an image by increasing contrast in high frequency space. The amount of unsharpness of the original image can be taken into account by adjusting the sharpening radius. As an option you can choose to sharpen the luminance (YCbCr) channel of the image only. The plugin can be found under "Filters > Enhance > Wavelet sharpen"

ePDFView is a free lightweight PDF document viewer using Poppler and GTK+ libraries. The aim of ePDFView is to make a simple PDF document viewer, in the lines of Evince but without using the Gnome libraries.

Giram Is a Renderer And a Modeller. It is a Persistance Of Vision (POV-Ray) oriented modeller, but may become more of a general modeller in the future.

A plugin to GKrellM that displays thumbnails of periodically updated images.

An Image viewer that uses Gdk-Pixbuf to load images, and OpenGL to render them.

Gltt is a library that allows you to read and draw TrueType fonts in any OpenGL application. It supports bitmapped and anti-aliased font drawing as well as vectorized and polygonized drawing.

epstool - Create or extract preview bitmaps in EPS files. Features: - Add EPSI or DOS EPS previews. - Extract postscript from DOS EPS files. - Uses Ghostscript to create preview bitmaps. - Scan a bitmap created by Ghostscript to find bounding box. - Create TIFF or Interchange from part of a bitmap created by Ghostscript.