Tag Archives: smoothing images

Anti-aliasing for improving image quality

About a year ago I have briefly shown in my post “smoothing images” that averaging can be important to get good images without pixel noise. For my kaleidoscope app, see http://geometricolor.ch/sphericalKaleidoscopeApp.html, I have improved on these ideas and that’s what … Continue reading

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Smoothing images

The image quality suffers if the mapping functions X(x,y) and Y(x,y) of the position (x,y) of a pixel of the output image to the position (X,Y) of the sampled input image pixel are strongly contracting or expanding. For contracting mappings … 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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fractals in high resolution

Fractal images are a good reason to draw off-screen in high-resolution, as discussed in an earlier post. Looking at the low-resolution image of “self-similar fractals …” we need some imagination to see that it is really self-similar. Too much details … 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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