# Noise edge detection

**URL:** https://discourse.processing.org/t/noise-edge-detection/13367
**Category:** Coding Questions
**Created:** [August 13, 2019, 10:46pm UTC](https://discourse.processing.org/t/noise-edge-detection/13367 "2019-08-13T22:46:06Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![jeremydouglass](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/jeremydouglass/32/20_2.png) [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)
#### Post date: [August 15, 2019, 6:06pm UTC](https://discourse.processing.org/t/noise-edge-detection/13367/2 "2019-08-15T18:06:57Z")

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> [@TimoL](#):
>
> a way to use 2D noise (animated in Z) instead of a single source image.

I’m trying to understand this, but I’m not getting it. What does using noise() have to do with generating an image like your source.jpg? Also, what does “animated in Z” have to do with generating a grid of rectangles – or with a 2D sketch?

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