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55 changes: 39 additions & 16 deletions README.md
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</p>

<h3>
<a href="//www.visioncortex.org/vtracer-docs">Article</a>
<a href="https://www.visioncortex.org/vtracer-docs">Article</a>
<span> | </span>
<a href="//www.visioncortex.org/vtracer/">Demo</a>
<a href="https://www.visioncortex.org/vtracer/">Demo</a>
<span> | </span>
<a href="//github.com/visioncortex/vtracer/releases/latest">Download</a>
<a href="https://github.com/visioncortex/vtracer/releases/latest">Download</a>
</h3>

<sub>Built with 🦀 by <a href="//www.visioncortex.org/">The Vision Cortex Research Group</a></sub>
<sub>Built with 🦀 by <a href="https://www.visioncortex.org/">The Vision Cortex Research Group</a></sub>
</div>

## Introduction
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VTracer is originally designed for processing high resolution scans of historic blueprints up to gigapixels. At the same time, VTracer can also handle low resolution pixel art, simulating `image-rendering: pixelated` for retro game artworks.

A technical description of the algorithm is on [visioncortex.org/vtracer-docs](//www.visioncortex.org/vtracer-docs).
A technical description of the algorithm is on [visioncortex.org/vtracer-docs](https://www.visioncortex.org/vtracer-docs).

## Web App

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-s, --splice_threshold <splice_threshold> Minimum angle displacement (degree) to splice a spline
```
### Usage
### Install
You can download pre-built binaries from [Releases](https://github.com/visioncortex/vtracer/releases).
You can also install the program from source from [crates.io/vtracer](https://crates.io/crates/vtracer):
```sh
cargo install vtracer
```
### Usage
```sh
./vtracer --input input.jpg --output output.svg
```
## Library
The library can be found on [crates.io/vtracer](//crates.io/crates/vtracer) and [crates.io/vtracer-webapp](//crates.io/crates/vtracer-webapp).
## Rust Library
## Install
You can install [`vtracer`](https://crates.io/crates/vtracer) as a Rust library.
Download pre-built binaries from [Releases](https://github.com/visioncortex/vtracer/releases).
```sh
cargo add vtracer
```
or
## Python Library
Install from source (Rust toolchain needed):
Since `0.6`, [`vtracer`](https://pypi.org/project/vtracer/) is also packaged as Python native extensions, thanks to the awesome [pyo3](https://github.com/PyO3/pyo3) project.
```
cargo install vtracer
```sh
pip install vtracer
```
## In the wild
VTracer is used by the following products (feel free to add yours to the list):
VTracer is used by the following projects (feel free to add yours!):
<table>
<tbody>
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</tr>
</tbody>
</table>
## What's next?
There are several things in my mind:
1. Pencil tracing. Instead of tracing shapes as closed paths, may be we can attempt to skeletonize the shapes as open paths. The output would be clean, fixed width strokes.
2. Perfect cut-out mode. Right now in cut-out mode, the shapes do not share perfect boundaries, but have seams.
3. Image cleaning. Right now the tracer works best on losslessly compressed pngs. If an image suffered from jpeg noises, it could impact the tracing quality. We might be able to develop a pre-filtering pass that denoises the input.
If you are interested in working on them or willing to sponsor its development, feel free to get in touch.
96 changes: 96 additions & 0 deletions cmdapp/README.md
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<div align="center">

<img src="https://raw.githubusercontent.com/visioncortex/vtracer/master/docs/images/visioncortex-banner.png">
<h1>VTracer</h1>

<p>
<strong>Raster to Vector Graphics Converter built on top of visioncortex</strong>
</p>

<h3>
<a href="https://www.visioncortex.org/vtracer-docs">Article</a>
<span> | </span>
<a href="https://www.visioncortex.org/vtracer/">Demo</a>
<span> | </span>
<a href="https://github.com/visioncortex/vtracer/releases/latest">Download</a>
</h3>

<sub>Built with 🦀 by <a href="https://www.visioncortex.org/">The Vision Cortex Research Group</a></sub>
</div>

## Introduction

visioncortex VTracer is an open source software to convert raster images (like jpg & png) into vector graphics (svg). It can vectorize graphics and photographs and trace the curves to output compact vector files.

Comparing to [Potrace](http://potrace.sourceforge.net/) which only accept binarized inputs (Black & White pixmap), VTracer has an image processing pipeline which can handle colored high resolution scans.

Comparing to Adobe Illustrator's [Image Trace](https://helpx.adobe.com/illustrator/using/image-trace.html), VTracer's output is much more compact (less shapes) as we adopt a stacking strategy and avoid producing shapes with holes.

VTracer is originally designed for processing high resolution scans of historic blueprints up to gigapixels. At the same time, VTracer can also handle low resolution pixel art, simulating `image-rendering: pixelated` for retro game artworks.

A technical description of the algorithm is on [visioncortex.org/vtracer-docs](https://www.visioncortex.org/vtracer-docs).

## Cmd App

```sh
visioncortex VTracer 0.4.0
A cmd app to convert images into vector graphics.

USAGE:
vtracer [OPTIONS] --input <input> --output <output>

FLAGS:
-h, --help Prints help information
-V, --version Prints version information

OPTIONS:
--colormode <color_mode> True color image `color` (default) or Binary image `bw`
-p, --color_precision <color_precision> Number of significant bits to use in an RGB channel
-c, --corner_threshold <corner_threshold> Minimum momentary angle (degree) to be considered a corner
-f, --filter_speckle <filter_speckle> Discard patches smaller than X px in size
-g, --gradient_step <gradient_step> Color difference between gradient layers
--hierarchical <hierarchical>
Hierarchical clustering `stacked` (default) or non-stacked `cutout`. Only applies to color mode.

-i, --input <input> Path to input raster image
-m, --mode <mode> Curver fitting mode `pixel`, `polygon`, `spline`
-o, --output <output> Path to output vector graphics
--path_precision <path_precision> Number of decimal places to use in path string
--preset <preset> Use one of the preset configs `bw`, `poster`, `photo`
-l, --segment_length <segment_length>
Perform iterative subdivide smooth until all segments are shorter than this length

-s, --splice_threshold <splice_threshold> Minimum angle displacement (degree) to splice a spline
```
### Install
You can download pre-built binaries from [Releases](https://github.com/visioncortex/vtracer/releases).
You can also install the program from source from [crates.io/vtracer](https://crates.io/crates/vtracer):
```sh
cargo install vtracer
```
### Usage
```sh
./vtracer --input input.jpg --output output.svg
```
## Rust Library
You can install [`vtracer`](https://crates.io/crates/vtracer) as a Rust library.
```sh
cargo add vtracer
```
## Python Library
Since `0.6`, [`vtracer`](https://pypi.org/project/vtracer/) is also packaged as Python native extensions, thanks to the awesome [pyo3](https://github.com/PyO3/pyo3) project.
```sh
pip install vtracer
```
2 changes: 1 addition & 1 deletion cmdapp/src/lib.rs
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// Copyright 2020 Tsang Hao Fung. See the COPYRIGHT
// Copyright 2023 Tsang Hao Fung. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
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