From 24338bb477860ef7fdd8ce2f16fe9eeb357ef9eb Mon Sep 17 00:00:00 2001 From: raiden00pl Date: Tue, 24 Oct 2023 14:06:54 +0200 Subject: [PATCH] remove tools/README.md. Migrated to Documentation/applications/tools --- tools/README.md | 30 ------------------------------ 1 file changed, 30 deletions(-) delete mode 100644 tools/README.md diff --git a/tools/README.md b/tools/README.md deleted file mode 100644 index d7045ee9c..000000000 --- a/tools/README.md +++ /dev/null @@ -1,30 +0,0 @@ -# Tools - -## NxWidgets `bitmap_converter.py` - -This script converts from any image type supported by Python imaging library to -the RLE-encoded format used by NxWidgets. - -RLE (Run Length Encoding) is a very simply encoding that compress quite well -with certain kinds of images: Images that that have many pixels of the same -color adjacent on a row (like simple graphics). It does not work well with -photographic images. - -But even simple graphics may not encode compactly if, for example, they have -been resized. Resizing an image can create hundreds of unique colors that may -differ by only a bit or two in the RGB representation. This _color smear_ is the -result of pixel interpolation (and might be eliminated if your graphics software -supports resizing via pixel replication instead of interpolation). - -When a simple graphics image does not encode well, the symptom is that the -resulting RLE data structures are quite large. The palette structure, in -particular, may have hundreds of colors in it. There is a way to fix the graphic -image in this case. Here is what I do (in fact, I do this on all images prior to -conversion just to be certain): - -- Open the original image in GIMP. -- Select the option to select the number of colors in the image. -- Pick the smallest number of colors that will represent the image faithfully. - For most simple graphic images this might be as few as 6 or 8 colors. -- Save the image as PNG or other lossless format (NOT jpeg). -- Then generate the image.