File:Aliasing circles.gif
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Aliasing_circles.gif (360 × 359 pixels, file size: 8.77 MB, MIME type: image/gif, looped, 197 frames, 20 s)
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Summary
| Description |
English: An example of aliasing: if you try to represent circles (in this case I am plotting cos(x²+y²) ) on a square grid (e.g. your monitor) and your pixellation is too coarse, you start getting Moiré-like patterns appearing. |
| Date | |
| Source | https://twitter.com/j_bertolotti/status/1463806938114834432 |
| Author | Jacopo Bertolotti |
| Permission (Reusing this file) |
https://twitter.com/j_bertolotti/status/1030470604418428929 |
Mathematica 12.0 code
L = 7;
frames = Table[
tmp = Table[Cos[x^2 + y^2]/2 + 0.5, {x, 10^-5, L, \[Delta]}, {y, 10^-5, L, \[Delta]}];
ArrayPlot[ ArrayFlatten[{{Reverse@Transpose@Reverse@tmp, Reverse@tmp}, {Transpose@Reverse@tmp, tmp}}] , Frame -> False]
, {\[Delta], 0.01, 0.5, 0.0025}];
ListAnimate[frames]
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:49, 26 November 2021 | | 360 × 359 (8.77 MB) | Berto | Uploaded own work with UploadWizard |
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