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Step 1: Renaming and rotating

Page history last edited by juliano 11 years ago

When you press “1” or “2” on Homer’s startup menu, all the images inside the input folder are automatically renamed and rotated according to your preferences. The original files are left untouched, while the renamed files are saved in a new folder inside the input one. The script renames and rotates about 2 images per second on average, depending on the speed of your computer.

In order to rotate the images, Homer uses a program called jpegtran, a command-line utility included in the libjpeg library, which has the advantage of performing “lossless” transformations: that is, the rotation is done “without decompressing and recompressing the data, and so causing a reduction of image quality due to generation loss” [5].


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