Coherent Line Drawing

This project implemented a non-photorealistic rendering technique presented by Kang et al, that can automatically generates a line drawing from a photograph. This project provide an easy-to-use, real-time interactive graphic user interface system.

• Original academic paper
• Introduction in Chinese

WebGL Version (run in browser)

Live demo — a GPU port of the full pipeline running entirely in the browser, no installation required. Every stage runs as a WebGL2 fragment shader, so all parameters update in real time. See webgl/ for details.

Workflow (Youtube)

Build

Requirement

• C++ 17
• CMake
• OpenCV 4
• WxWidget 3 (not required for cmd application)
• Boost (not required for gui application)

If you prefer C++ 11 version, there is a branch called cpp11, the function is equivalent.

It should work fine in Windows/Linux/MacOS.
I provided some scripts that can use in Linux:

# Usage: build.sh [options]# Options:# -c, --clean Clean build# -d, --debug Build with debug mode# -j, --jobs Use N cores to build
$ ./build.sh
# Usage: linter.sh [options]# Check code style# Options:# -i In-place format
$ ./linter.sh

Command Line Version

I provide another command line application that can directly use without graphic interface, the entry point is src/cmd.cpp. The options is list as following, also you can refer to ./test.sh to see how to use:

# Coherent-Line-Drawing Options:# -h [ --help ] Help message# -s [ --src ] arg Source image path# -o [ --output ] arg Output image path# --ETF_kernel arg (=5) ETF kernel size# --ETF_iter arg (=1) Refining n times ETF# --CLD_iter arg (=1) Iterate n times FDoG# --sigma_c arg (=1) Line width# --sigma_m arg (=3) Degree of coherence# --rho arg (=0.997) Noise# --tau arg (=0.8) Thresholding

Pre-Build GUI Version

You can download pre-build version at here.
Including Windows and macOS versions.

Screenshots