possibility to effectively panorate the background in an animation. (Yes, Gimp has its own animation studio.) For more information about layers and layer size, please read “Resize Layer” on page 321. Layer is Guash. If you have worked on a UNIX sys- tem before, you have probably used xv and its Visual Schnauzer. Visual Schnau- zer displays thumbnails of images, and allows you to browse through the thumbnails drawing it within the frame of two vertical and two hor- izontal guides (just using the guides as visual references). The G imp Us e r’s Man u al 1 1 5 C h a p ter 7 RECTANGULAR AND ELLIPTICAL SELECTION

Dialog, you can opt for The GIMP defaults which reduce the size quite a bit, without hurting the visual quality in a way that I can detect. This would be the safest and quickest thing to do. GNU Image for the third dimension to represent a color at random between black and blue. The other method is visual, by using the array representation. Correlation between two methods is represented in next image: Fade Out This option causes each stroke to fade out over the specified distance. It is easiest to visual for painting tools, but applies to all of the brush tools. It is equivalent to gradually reducing

“Export Image as JPEG” dialog uses default values that reduce size in memory while retaining good visual quality; this is the safest and quickest thing to do. Figure 3.23 “Export Image as JPEG” dialog for the third dimension to represent a color at random between black and blue. The other method is visual, by using the array representation. Correlation between two meth- ods is represented in next image: present you have to use an external program such as xcalib or dispwin. (If one just does a simple visual calibration using a web site such as that of Norman Koren, one might only use xgamma to load a gamma

polygon, etc. These objects can be enlarged without any loss of quality and is therefore useful in visual designs. Common raster image formats are listed below: Extension Name Properties BMP

on their name. A double_click on the thumbnail opens a full dialog where you can also set the visual aspect of the channel in the image window. In front of the thumbnail there is an eye icon: by clicking dialog Here, we are back in the medical domain. "Contrast Sensitivity" is the capacity of the visual system to distinguish slight differences in contrast. Some people with cataracts (which means that This filter is found in the image window menu under Filters Colors Retinex . "Retinex" improves visual rendering of an image when lighting conditions are not good. While our eye can see colors correctly