GIMP

In spite of working mostly for server software and server setup using powerful non-graphic command line tools and scripting languages, it is sometimes fun to work with something very graphical. I did talk about Clojure Art, which is fun and creates interesting visual results and helps getting into the phantastic language Clojure. But more than […]

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Combining multiple scans

When images are scanned multiple times, maybe there is a way to construct an image that is better than any of the scans from them. In this case it is assumed, that one scan has a higher resolution, but another scan got the colors better. It has already been found out, which two scans belong […]

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Comparing Images

A practical problem that I have is to sort my digital photos. Some of them have been taken with analog cameras and they have been scanned. Some of them have been scanned several times, using different resolution, different providers or different technologies. So one issue that occurs is having two directories which contain more or […]

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How to draw lines, circles and other curves

These ideas were developed more than 30 years without knowing that they were already known at that time… Today the graphics cards can easily do things like this in very little time. And today’s CPUs are of course really good at multiplying. So this has lost a lot of its immediate relevance, but it is […]

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Conversion of ASCII-graphics to PNG or JPG

Images are usually some obscure binary files. Their most common formats, PNG, SVG, JPEG and GIF are well documented and supported by many software tools. Libraries and APIs exist for accessing these formats, but also a phantastic free interactive software like Gimp. The compression rate that can reasonably be achieved when using these format is […]

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