pixel-collector

Collects clumps of adjacent pixels into rectangles. This library easily drops into existing projects as a pair of header/source files.

The C++11 implementation requires std::bind and std::vector. The C implementation does not.

Example usage

#include "stb_image.h"

int main() {
    using namespace PixelCollector;

    int width, height, channels;
    unsigned char * data = stbi_load("sample.png", &width, &height, &channels, 3);

    std::vector<AABB> boxes;
    Color white = {255,255,255};
    collect(data, width, height, channels, boxes, white);
}

See main.cpp and main.c for more.

Example input

A small PNG image, with regions of black, blue, and red. White will be ignored.

Example output

In the format { (x, y), (width, height), color }

AABB{ (2, 3), (106, 8), 0x000000 }
AABB{ (110, 3), (1, 56), 0x000000 }
AABB{ (7, 11), (12, 48), 0x000000 }
AABB{ (44, 28), (7, 9), 0x000000 }
AABB{ (51, 28), (7, 9), 0x0000ff }
AABB{ (44, 55), (15, 4), 0xff0000 }
AABB{ (7, 59), (7, 5), 0x000000 }
AABB{ (14, 59), (100, 4), 0x0000ff }
AABB{ (14, 63), (5, 1), 0x000000 }
AABB{ (44, 63), (15, 3), 0xff0000 }
AABB{ (110, 63), (1, 13), 0x000000 }

License

MIT