Java Utililty Methods BufferedImage to Gray Scale

List of utility methods to do BufferedImage to Gray Scale

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Description

The list of methods to do BufferedImage to Gray Scale are organized into topic(s).

Method

BufferedImageimageToGrayscale(BufferedImage image)
image To Grayscale 
final BufferedImage grayscale;
if (image.getType() == BufferedImage.TYPE_BYTE_BINARY) {
    return image;
} else if (image.getType() == BufferedImage.TYPE_BYTE_GRAY) {
    grayscale = image;
} else if (image.getType() == BufferedImage.TYPE_INT_RGB
        || image.getType() == BufferedImage.TYPE_BYTE_INDEXED) {
    grayscale = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_BYTE_GRAY);
...
BufferedImageimageToGrayscale(BufferedImage img)
image To Grayscale 
colorConvert.filter(img, img);
return img;
BufferedImagegray(BufferedImage src)
gray 
int width = src.getWidth();
int height = src.getHeight();
BufferedImage grayImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
for (int i = 0; i < width; i++) {
    for (int j = 0; j < height; j++) {
        int rgb = src.getRGB(i, j);
        grayImage.setRGB(i, j, rgb);
return grayImage;
BufferedImagegrayImage(BufferedImage image)
gray Image 
int width = image.getWidth();
int height = image.getHeight();
BufferedImage grayImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
for (int i = 0; i < width; i++) {
    for (int j = 0; j < height; j++) {
        int rgb = image.getRGB(i, j);
        grayImage.setRGB(i, j, rgb + 100);
return grayImage;
voidbyteBufferToGrayBufferedImage(ByteBuffer buffer, BufferedImage bi)
Converts depth values in ShortBuffer to a gray scale BufferedImage. 
if (bi.getType() != BufferedImage.TYPE_USHORT_GRAY)
    throw new IllegalArgumentException(
            "Invalid image type. Expect image " + "type BufferedImage.TYPE_USHORT_GRAY.");
int maxDepth = 1 << 16 - 1;
short[] imageArray = ((DataBufferUShort) bi.getRaster().getDataBuffer()).getData();
buffer.rewind();
while (buffer.remaining() > 0) {
    int pos = buffer.position();
...