Function processWithClassicLab

web/js/algorithms.js:306–316

* Algorithm: Classic LAB (recommended for classical pixel art) * - Averages blocks (clean solid-color blocks, no dithering) * - Palette generated via Median Cut in CIELAB space → more perceptually * distinct colors than RGB Median Cut * - Color matching uses LAB distance → nearest color is the

(imageData, blockSize, palette)

 * color fidelity — especially for skin tones, gradients, and similar hues.
 */
function processWithClassicLab(imageData, blockSize, palette) {
    const { grid, rows, cols } = extractBlockGridAverage(imageData, blockSize);
    const labPalette = buildLabPalette(palette);
    for (let row = 0; row < rows; row++) {
        for (let col = 0; col < cols; col++) {
            const [r, g, b] = grid[row][col];
            grid[row][col] = nearestLabColor(r, g, b, labPalette);
        }
    }
    paintBlockGrid(grid, rows, cols, imageData, blockSize);
}

/**
 * Algorithm: LAB + Floyd-Steinberg Dithering