Demo Code

In this demo, we show a very simple example of using our library: a test image will be pixelized with hexagonical patches. First, an image is opened and class instanses HexagonCells::CCell and HexagonCells::CMarker are created and initialized. Then, after the number of cells in image is known, we draw hexagons upon the image and show it. After a keypress, the application exits.

#include "hCell.h"

using namespace HexagonCells;

int main () 
{
    // CCell class is resposible for calcilating average color values
    // within each hexagon, mapped on the input image
    CCell   cell;

    // CMarker class is responsible for drawing solid and wireframe
    // hexagons on given images
    CMarker marker;

    // We chose the hexagon area S to be equal to 25 pixels,
    // thus the hexagon radius R is calculated as R = 0.6204 * sqrt(S)
    const double R = 3.102;
    cell.setRadius(R);

    // Load and set the test image
    Mat img = imread("test_image.jpg", 1);
    cell.setImage(img);
    
    // Achieving the number of hexagons, corresponding to the input image
    cell_params params = cell.getInfo();
    
    // Drawing solid hexagons on the same input image
    for (register int n = 0; n < params.N; n++)
        marker.markHexagon(img, R, n, cell.getVal(n)); 

    // Optinally mark the drawn hexagons with a grid of custom color
    marker.markGrid(img, R, CV_RGB(0, 128, 64));

    // Show the result
    imshow("Demo", img);
    cvWaitKey();
    return 0;
}

Additionally, if you use the version of the library with pre-build binaries, you can drag-and-drop an image to the Demo.exe application. The pixellized with hexagons version of the image will be created in the same directory with suffix "_hex" in the file name.