@abasb75/dicom-pixel-decoder/Utilities/ybrFull.js

a powerfull javascript dicom pixel data decoder

function yrbFullToRgba(pixelData, pixelModule) {
    var columns = pixelModule.columns, rows = pixelModule.rows, planarConfiguration = pixelModule.planarConfiguration;
    if (!columns || !rows) {
        return pixelData;
    }
    if (pixelData.length !== columns * rows * 3) {
        return pixelData;
    }
    var pixelCounts = rows * columns;
    var _pixelData = new Uint8ClampedArray(pixelCounts * 4);
    if (planarConfiguration === 1) {
        for (var i = 0; i < pixelCounts; i++) {
            var y = pixelData[i];
            var cb = pixelData[pixelCounts + i];
            var cr = pixelData[(pixelCounts * 2) + i];
            _pixelData[i * 4] = y + 1.402 * (cr - 128);
            _pixelData[i * 4 + 1] = y - 0.34414 * (cb - 128) - 0.71414 * (cr - 128);
            _pixelData[i * 4 + 2] = y + 1.772 * (cb - 128);
            _pixelData[i * 4 + 3] = 255;
        }
    }
    else {
        for (var i = 0; i < pixelCounts; i++) {
            var y = pixelData[i * 3];
            var cb = pixelData[i * 3 + 1];
            var cr = pixelData[i * 3 + 2];
            _pixelData[i * 4] = y + 1.402 * (cr - 128);
            _pixelData[i * 4 + 1] = y - 0.34414 * (cb - 128) - 0.71414 * (cr - 128);
            _pixelData[i * 4 + 2] = y + 1.772 * (cb - 128);
            _pixelData[i * 4 + 3] = 255;
        }
    }
    return new Uint8Array(_pixelData);
}
export default yrbFullToRgba;