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Category Archives: Visualization
How to make black&white images look good
Grayscale pictures are very relevant, even in these highly digital days. One reason is that in print media it is much cheaper to publish images in monochrome rather than in colour. Another reason is the human visual system where, roughly … Continue reading
Posted in Matlab examples, Sekalaista, Visualization
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Explaining sine and cosine visually
Articles and presentations often benefit from geometric illustrations. But how to draw them? There are of course many software options for creating vector graphics, but it is practical to use as few different tools as possible. That’s why I rely … Continue reading
Posted in Geometric illustration, Matlab examples, Visualization
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Plotting a function of one variable
Let’s study one of the most common tasks in the visualization of applied mathematics: plotting a function on a real variable. Matlab’s default settings often need some tuning for a specific purpose. The example is very simple: plot the sine … Continue reading
Displaying Image Data for Comparison
I am often faced with the problem of showing an “original image” and a “reconstructed image,” which may have completely different dynamic ranges. Namely, when working with illposed inverse problems, unsuccessful reconstructions sometimes amplify measurement noise a lot. However, it … Continue reading