public class SignatureChecks {

    @SuppressWarnings("unused")
    public static void main(String[] argv) {

        // Check if the signatures of all required function in class Color are correct
        float color;
        int value;
        float[][] gray = new float[4][4];
        int[][] image;
        color = Color.getRed(0);
        color = Color.getGreen(0);
        color = Color.getBlue(0);
        color = Color.getGray(0);
        value = Color.getRGB(0.0f, 0.0f, 0.0f);
        value = Color.getRGB(0.0f);
        image = Color.toRGB(gray);
        gray = Color.toGray(image);

        // Check if the signatures of all required function in class Filter are correct
        float[][] kernel = new float[3][3];
        color = Filter.at(gray, -1, -1);
        gray = Filter.filter(gray, kernel);
        gray = Filter.smooth(gray);
        gray = Filter.sobel(gray);

        // Check if the signatures of all required function in class Filter are correct
        int[] path, seam;
        float[] costs = new float[]{1, 1, 1};
        int[][] successors = new int[][]{{0, 1}, {}, {4}};
        float[][] energy = new float[4][4];
        path = Seam.path(successors, costs, 0, 2);
        seam = Seam.find(energy);
        image = Seam.merge(image, seam);

    }
}