pixl

pixl is a lightweight image processing library, written in C++11.

The main goals of this project are ease of use and performance. Image decoding/encoding is done by third party libraries. Currently supported image formats are: png and jpeg.

There are also APIs for C, Python and Go.

Usage

#include <pixl/pixl.h>

int main() {
    // Resize image
    auto image = pixl::read("path/to/image.png"); 
    image->resize(256, 256);
    pixl::write(image, "path/to/small_image.png");

    return 0;
}

Transformations & Filters

• [ ] Resize
  • [x] Nearest Neighbor
  • [x] Bilinear
  • [ ] Bicubic
  • [ ] Lanczos2
  • [ ] Lanczos3
• [x] Flip
  • [x] Horizontally
  • [x] Vertically
• [ ] Crop
• [ ] Rotate
• [x] Grayscale
• [x] Invert
• [x] 3x3 Convolution Matrix

Dependencies

The following libraries must be on the system:

• libpng for png decoding & encoding
• libjpeg-turbo for fast jpeg decoding & encoding

Additionally i use Catch for unit testing.

Building

You need CMake to build the library with all examples and tests.
You also need a C++11 compatible compiler.

While the code should work on all major platforms, the only supported OS so far is Linux. Pixl compiles successfully on:

• Linux Mint 17.3
• Arch Linux

Building on Linux

mkdir build && cd build
cmake ..
make

Packaging

Arch Linux

There is a working PKGBUILD in pkg/arch. Once this project leaves the alpha stage i will submit it to the AUR.

Debian/Ubuntu

TBD