public void sobel() {
sobel = new BufferedImage(width, height, filtered.getType());
Graphics2D g = sobel.createGraphics();
g.setColor(new Color(0, 0, 0, 0));
g.fillRect(0, 0, width, height);
g.dispose();
int[] tmp = new int[1];
sX = new double[height][width];
sY = new double[height][width];
double maxX = 0;
double maxY = 0;
for (int y = 1; y < height - 1; ++y)
for (int x = 1; x < width - 1; ++x) {
double Xvalue = 0;
double Yvalue = 0;
for (int j = -1; j <= 1; ++j)
for (int i = -1; i <= 1; ++i) {
Xvalue += GX[1 + j][1 + i] * filtered.getRaster().getPixel(x + i, y + j, tmp)[0];
Yvalue += GY[1 + j][1 + i] * filtered.getRaster().getPixel(x + i, y + j, tmp)[0];
}
if (Xvalue > maxX) maxX = Xvalue;
if (Yvalue > maxY) maxY = Yvalue;
sX[y][x] = Xvalue;
sY[y][x] = Yvalue;
}
for (int y = 1; y < height - 1; ++y)
for (int x = 1; x < width - 1; ++x) {
double[] a = {(Math.abs((sX[y][x] / maxX * 255)) + Math.abs((sY[y][x] / maxY) * 255))};
// if (a[0] > 0) binary[y][x] = 1;
// if (a[0] <= 0) binary[y][x] = 0;
sobel.getRaster().setPixel(x, y, a);
}
ImageIcon icon2 = new ImageIcon(sobel);
lbl2.setIcon(icon2);
}
private void buildAccumulator(int r) {
accImage = new BufferedImage(width, height, greyScale.getType());
Graphics2D g = accImage.createGraphics();
g.setColor(new Color(0, 0, 0, 0));
g.fillRect(0, 0, width, height);
g.dispose();
int max = 0;
double[] a = new double[1];
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x) {
a[0] = acc[y * width + x][r - rmin] & 0xFF;
accImage.getRaster().setPixel(x, y, a);
}
ImageIcon icon2 = new ImageIcon(accImage);
lbl2.setIcon(icon2);
}
/** Regenerates the image. */
private synchronized void regenerateImage() {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
float bri2 = this.bri;
float sat2 = this.sat;
float radius = ((float) size) / 2f;
float hue2;
float k = 1.2f; // the number of pixels to antialias
for (int y = 0; y < size; y++) {
float y2 = (y - size / 2f);
for (int x = 0; x < size; x++) {
float x2 = (x - size / 2f);
double theta = Math.atan2(y2, x2) - 3 * Math.PI / 2.0;
if (theta < 0) theta += 2 * Math.PI;
double r = Math.sqrt(x2 * x2 + y2 * y2);
if (r <= radius) {
if (mode == ColorPicker.BRI) {
hue2 = (float) (theta / (2 * Math.PI));
sat2 = (float) (r / radius);
} else { // SAT
hue2 = (float) (theta / (2 * Math.PI));
bri2 = (float) (r / radius);
}
row[x] = Color.HSBtoRGB(hue2, sat2, bri2);
if (r > radius - k) {
int alpha = (int) (255 - 255 * (r - radius + k) / k);
if (alpha < 0) alpha = 0;
if (alpha > 255) alpha = 255;
row[x] = row[x] & 0xffffff + (alpha << 24);
}
} else {
row[x] = 0x00000000;
}
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
} else if (mode == ColorPicker.HUE) {
float hue2 = this.hue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
row[x] = Color.HSBtoRGB(hue2, x2, y2);
}
image.getRaster().setDataElements(0, y, image.getWidth(), 1, row);
}
} else { // mode is RED, GREEN, or BLUE
int red2 = red;
int green2 = green;
int blue2 = blue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
if (mode == ColorPicker.RED) {
green2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else if (mode == ColorPicker.GREEN) {
red2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else {
red2 = (int) (x2 * 255 + .49);
green2 = (int) (y2 * 255 + .49);
}
row[x] = 0xFF000000 + (red2 << 16) + (green2 << 8) + blue2;
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
}
repaint();
}
