swt.h is a header-only Stroke Width Transform implementation in C

Hi r/computervision, a while ago, I introduced [quickdoc](https://www.reddit.com/r/computervision/comments/15ngbm4/quickdoc_a_webassembly_based_site_that_can/), a document scanning utility. I've been expanding its capabilities, and as a natural extension, I'm creating an OCR system from scratch in C. This journey started with implementing the Stroke Width Transform (SWT), a crucial step in the OCR process.

I introduce [swt.h](https://github.com/aadv1k/swt.h) \-- a stb-style header only implementation for SWT, here is a brief overview of the process

* convert the image to grayscale
* apply a threshold, (otsu, or in …

analysis apply case computervision gradient image loop ray stroke threshold through