images.js

// Медианная фильтрация
$('#btn-filtering-mediana').click(function (e) {
    checkImageLoaded();
    var gsImage2d = copyGrayScaleImage1dTo2d(window.gsImage);
    var d = gsImage2d.data;

    var outputImage = [];

    var windowSize = parseInt($('#input-filtering-mediana-windowsize').val()) || 3;
    var wh = windowSize;
    var ww = windowSize;

    var edgex = Math.floor(ww / 2);
    var edgey = Math.floor(wh / 2);
    for (var f = edgey; f < gsImage2d.height - edgey; f++) {
        outputImage[f-edgey] = [];
        for (var l = edgex; l < gsImage2d.width - edgex; l++) {

            var slidingWindow = [];
            var k = 0;
            for (var i = 0; i < wh; i++) {
                for (var j = 0; j < ww; j++) {
                    slidingWindow[k] = d[f-edgey+i][l-edgex+j];
                    k++;
                }
            }
            slidingWindow.sort();
            outputImage[f-edgey][l-edgex] = slidingWindow[Math.floor(k / 2)];
        }
    }

    renderGrayScaleImage(canvas2, copyGrayScaleImage2dTo1d({
        width: gsImage2d.width - 2 * edgex,
        height: gsImage2d.height - 2 * edgey,
        data: outputImage
    }));
});