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. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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File history
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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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