/**
* Alter the color of each pixel in the image. Make the image sepia.
*
* @param bi The BufferedImage on which the color variation is done.
*/
public static void sepia(BufferedImage bi) {
// Get image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
int sepia = 25;
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
// Equalizes all RGB values, and then uses Sepia depth to increase Red and Green amounts by
// specified value to achieve sepia effect
int equalizer = (red + green + blue) / 3;
red = equalizer + (sepia * 2);
blue = equalizer;
green = equalizer + sepia;
// Restriction for values of RGB so to make sure image does not become over manipulated
if (red > 255) red = 255;
if (green > 255) green = 255;
if (blue > 255) blue = 255;
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Alter the color of each pixel in the image. Make the image cooler in color.
*
* @param bi The BufferedImage on which the color variation is done.
*/
public static void cooler(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
// Apply changes to the rgb value.
if (blue <= 190) {
blue += 5;
}
if (red >= 130) {
red--;
}
if (green >= 130) {
green--;
}
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Alter the color of each pixel in the image. Make the image greyscaled.
*
* @param bi The BufferedImage on which the color variation is done.
*/
public static void greyScale(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
// return R G B and alpha values in integer form
int rgb = bi.getRGB(x, y);
// unpack to get individual integers
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
int average = (red + green + blue) / 3;
// get rgb values in integers for manipulation
if (red <= 255) {
red = average;
}
if (green <= 255) {
green = average;
}
if (blue <= 255) {
blue = average;
}
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Alter the color of each pixel in the image. Make the image negatively colored.
*
* @param bi The BufferedImage on which the color variation is done.
*/
public static void negative(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
// calling unpack pixel to get individual values for RGB
// this allows for manipulation of these values easily
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
red = 255 - red;
green = 255 - green;
blue = 255 - blue;
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Mirrors the image horizontally by reassigning specific pixels around the image.
*
* @param bi The BufferedImage on which the translation is done
*/
public static void mirrorHorizontally(BufferedImage bi) {
// Get image size to be used in loops to assign rgba values
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// Temp image
BufferedImage newBi = new BufferedImage(xSize, ySize, 3);
// mirroring by flipping half an image
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(xSize - x - 1, y);
// retrieving the four rgba values using unpack pixel
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
int newColour =
packagePixel(
red, green, blue,
alpha); // packs pixels to be placed into the buffered image that was initially
// used.
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/** Displays the redone manipulated image to the user. */
public static BufferedImage redo() {
try {
previousImage = imageRedo.get(imageRedo.size() - 1);
addImage(imageRedo.get(imageRedo.size() - 1));
imageRedo.remove(imageRedo.size() - 1);
} catch (ArrayIndexOutOfBoundsException e) {
}
return previousImage;
}
/**
* Alter the color of each pixel in the image. Make the image brighter or darker.
*
* @param bi The BufferedImage on which the brightness variation is done
* @param side If true, then make the image bright ,else make image dark
*/
public static void brightness(BufferedImage bi, boolean side) {
// Get image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// The values that are to be changed in the image
int redNew = 0;
int greenNew = 0;
int blueNew = 0;
// assigning new values for rgb
if (side == true) {
redNew = 5;
greenNew = 5;
blueNew = 5;
} else {
redNew = -5;
greenNew = -5;
blueNew = -5;
}
// assigning new rgba values usign size of image as limit for loops
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
// Apply changes to the rgb value.
if (blue <= 205 && blue >= 50) {
blue += blueNew;
}
if (red <= 205 && red >= 50) {
red += redNew;
}
if (green <= 205 && green >= 50) {
green += greenNew;
}
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Rotates the image 90 degrees counter clock-wise by reassigning specific pixels around the
* image.
*
* @param bi The BufferedImage on which the translation is done
* @return BufferedImage The manipuated image
*/
public static BufferedImage rotateCCW(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// Temp image
BufferedImage newBi = new BufferedImage(ySize, xSize, 3);
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
newBi.setRGB(y, xSize - x - 1, bi.getRGB(x, y));
}
}
addImage(newBi);
return newBi;
}
/**
* Rotates the image 90 degrees clock-wise by reassigning specific pixels around the image.
*
* @param bi The BufferedImage on which the translation is done
* @return BufferedImage The manipuated image
*/
public static BufferedImage rotateCW(BufferedImage bi) {
// getting image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// Temp image
BufferedImage newBi = new BufferedImage(ySize, xSize, 3);
// rotating picture
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
newBi.setRGB(ySize - y - 1, x, bi.getRGB(x, y));
}
}
addImage(newBi);
return newBi;
}
/**
* Blurs the image.
*
* @param bi The BufferedImage on which the blur effect is done.
* @return BufferedImage The manipuated image
*/
public static BufferedImage blur(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
BufferedImage newBi = new BufferedImage(xSize, ySize, 3);
float[] matrix = {
0.111f, 0.111f, 0.111f,
0.111f, 0.111f, 0.111f,
0.111f, 0.111f, 0.111f,
};
BufferedImageOp op = new ConvolveOp(new Kernel(3, 3, matrix));
bi = op.filter(bi, newBi);
addImage(bi);
return newBi;
}
/**
* Swap the major colors of the image (red,green,blue)
*
* @param bi The BufferedImage that is being manipulated.
* @param type The type of switch to be performed.
*/
public static void swapColors(BufferedImage bi, int type) {
// Get image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
// Swapping the rgb values
int redNew = red;
int greenNew = green;
int blueNew = blue;
if (type == 0) {
redNew = green;
greenNew = red;
} else if (type == 1) {
redNew = blue;
blueNew = red;
} else if (type == 2) {
greenNew = blue;
blueNew = green;
} else if (type == 3) {
redNew = green;
greenNew = blue;
blueNew = red;
}
// assigning newly swapped rgb values
int newColour = packagePixel(redNew, greenNew, blueNew, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/**
* Flips the image horizontally by reassigning specific pixels around the image.
*
* @param bi The BufferedImage on which the translation is done
*/
public static void flipHorizontal(BufferedImage bi) {
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// Temp image, to store pixels as we reverse everything
BufferedImage newBi = new BufferedImage(xSize, ySize, 3);
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
newBi.setRGB(xSize - x - 1, y, bi.getRGB(x, y));
}
}
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
bi.setRGB(x, y, newBi.getRGB(x, y));
}
}
addImage(bi);
}
/**
* Flips the image vertically by reassigning specific pixels around the image.
*
* @param bi The BufferedImage on which the translation is done
*/
public static void flipVertical(BufferedImage bi) {
// getting image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// temporary image to flip
BufferedImage newBi = new BufferedImage(xSize, ySize, 3);
// flipping pixels
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
newBi.setRGB(x, ySize - y - 1, bi.getRGB(x, y));
}
}
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
bi.setRGB(x, y, newBi.getRGB(x, y));
}
}
addImage(bi);
}
/**
* Mirrors the image vertically by reassigning specific pixels around the image.
*
* @param bi The BufferedImage on which the translation is done
*/
public static void mirrorVertically(BufferedImage bi) {
// Get image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// Temp image
BufferedImage newBi = new BufferedImage(xSize, ySize, 3);
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, ySize - y - 1);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}
/** Displays the initial un-manipulated image to the user. */
public static BufferedImage reset() {
previousImage = images.get(0);
addImage(previousImage);
return previousImage;
}
/**
* Alter the color of the image by changing the rgba value. Make a specific color more dominant in
* the image.
*
* @param bi The BufferedImage on which the color variation is done
* @param colorSet The idicator that spcifies which color variation to carry out. 0 for blue, 1
* for green, 2 for red, 3 for yellow, 4 for purple.
*/
public static void colorify(BufferedImage bi, int colorSet) {
// Get image size
int xSize = bi.getWidth();
int ySize = bi.getHeight();
// The values that are to be changed in the image
int redNew = 0;
int greenNew = 0;
int blueNew = 0;
// blueify
if (colorSet == 0) {
redNew = -2;
greenNew = -2;
blueNew = 10;
}
// greenify
else if (colorSet == 1) {
redNew = -2;
greenNew = 10;
blueNew = -2;
}
// redify
else if (colorSet == 2) {
redNew = 10;
greenNew = -2;
blueNew = -2;
}
// yellowify
else if (colorSet == 3) {
redNew = 5;
greenNew = 5;
blueNew = -2;
}
// purpleify
else if (colorSet == 4) {
redNew = 5;
greenNew = -2;
blueNew = 5;
}
// Using the 2d array image size as the limit for the nested loops to assign the new colors
for (int x = 0; x < xSize; x++) {
for (int y = 0; y < ySize; y++) {
int rgb = bi.getRGB(x, y);
int[] rgbValues = unpackPixel(rgb);
int alpha = rgbValues[0];
int red = rgbValues[1];
int green = rgbValues[2];
int blue = rgbValues[3];
// Apply changes to the rgb value.
if (blue <= 205 && blue >= 50) {
blue += blueNew;
}
if (red <= 205 && red >= 50) {
red += redNew;
}
if (green <= 205 && green >= 50) {
green += greenNew;
}
int newColour = packagePixel(red, green, blue, alpha);
bi.setRGB(x, y, newColour);
}
}
addImage(bi);
}