Category Archives: Extra

two circles

Lately I have played around with inversion at circles trying to find some new kind of fractals. Thus I found a simple mapping that gives interesting designs. They are not fractal, instead overlapping circles appear. Inversion at a single circle … Continue reading

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class MakeOutputImage with anti-aliasing

In the earlier post “Smoothing and anti-aliasing” I discussed how to smooth images and reduce aliasing.This is an important part of the class MakeOutputImage. This class is rather a template for programming and not a finished module. You find its … Continue reading

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Smoothing and anti-aliasing

Aliasing arises if you want to show a structure that varies rapidly within the distance between pixels. Then you will see artefacts that are quite different. We can use this to get new strange images such as I showed in … Continue reading

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interpolation of pixels

If you look at my earlier post “Nautilus” you see that it is difficult to get good results for strongly distorted images. They have regions where the input image is strongly magnified and one input pixel could cover many pixels … Continue reading

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looking up colors

I wrote the code for the improved class Coordinates and for reading and writing images because I wanted to manipulate images with methods you won’t find in Photoshop and the like. But we still need a method to look up … Continue reading

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high resolution images with off-screen drawing

In an earlier post I have shown how to make smooth images at any scale using the pdf-renderer. But you can do this only with graphics objects such as line, point, shape, ellipse and so on. It won’t work if … Continue reading

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smooth images with the pdf-renderer

The images of the tilings look good on the computer screen but not so if printed out. We do not want to see pixels on paper. We could remedy this using roughly 16 times as much pixels, because the computer … Continue reading

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