Method Details

• encodeImageToBase64

  public static String encodeImageToBase64(BufferedImage image)

  Encodes target image to a Base64 string

  Parameters:

  image - BufferedImage to encode to String

  Returns:

  Base64 encoded String of image

• getLuminance

  public static double getLuminance(int rgb)

  Get luminance value for the given rgb value.

  Parameters:

  rgb - value

  Returns:

  luminance of the rgb value

• imagesSameSize

  public static boolean imagesSameSize(BufferedImage image1, BufferedImage image2)

  Check canvas sizes and resize images to same size

  Parameters:

  image1 - an image

  image2 - an image

  Returns:

  true if images have same size, false otherwise

• cropToBeSameSize

  public static List<BufferedImage> cropToBeSameSize(BufferedImage image1, BufferedImage image2)

  Resize images to be same size. The size is determined by the minimum height and minimum width of the images.

  Parameters:

  image1 - an image.

  image2 - an image.

  Returns:

  a list containing two images with the same dimensions

• createSampleBuffer

  public static final int[] createSampleBuffer()

  Create a 16x16 sample buffer with space for 4 color bands

  Returns:

  sample buffer int array

• getImageProperties

  public static final ImageUtil.ImageProperties getImageProperties(BufferedImage image)

  Extract magical image properties used by the getBlock function.

  Parameters:

  image - a BufferedImage

  Returns:

  an ImageProperties descriptor object

• getBlock

  public static final int[] getBlock(ImageUtil.ImageProperties properties, int x, int y, int[] result, int[] sample)

  Returns the 16x16 RGB block starting at (x,y) from the given image

  Parameters:

  properties - The properties of the image (image + metadata)

  x - The x coordinate of the block (in pixels)

  y - The y coordinate of the block (in pixels)

  result - A sample buffer (32 bits per pixel) for storing the resulting block, or null (a new buffer will be created)

  sample - A sample buffer for storing intermediate values, or null (a new buffer will be created). This parameter is provided mainly for speed (providing it eliminates unnecessary block allocations).

  Returns:

  An array of RGB values for the block

• cloneImage

  public static BufferedImage cloneImage(BufferedImage sourceImage)

  Clones the given BufferedImage

  Parameters:

  sourceImage - The image to copy

  Returns:

  A copy of sourceImage