Java ByteBuffer Size markDifferencesWithAMarker(final BufferedImage image, final Point[] pixels, final int markingSizeX, final int markingSizeY)

Description

Method to mark areas around the detected differences.

License

Open Source License

Parameter

Parameter	Description
image	the original image for which the differences were found
pixels	the array with the differences.
markingSizeX	Length of the marker on the x axis
markingSizeY	Length of the marker on the y axis

Return

Copy of the original image with marked pixels

Declaration

protected static BufferedImage markDifferencesWithAMarker(final BufferedImage image, final Point[] pixels,
        final int markingSizeX, final int markingSizeY) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.image.BufferedImage;

public class Main {
    /**/*from   ww  w .  j a  v a 2  s  .c o  m*/
     * Method to mark areas around the detected differences. Goes through every pixel that was different and marks the
     * marking block it is in, unless it was marked already. <br>
     * If markingX of markingY are 1, it will simply mark the detected differences.
     *
     * @param image the original image for which the differences were found
     * @param pixels
     *            the array with the differences.
     * @param markingSizeX Length of the marker on the x axis
     * @param markingSizeY Length of the marker on the y axis
     * @return Copy of the original image with marked pixels
     */
    protected static BufferedImage markDifferencesWithAMarker(final BufferedImage image, final Point[] pixels,
            final int markingSizeX, final int markingSizeY) {
        if (pixels == null) {
            return null;
        }

        final BufferedImage imageCopy = copyImage(image);

        final Color highlighterColor = new Color(228, 252, 90, 50);
        final Color pixelEmphasizeColor = new Color(228, 0, 0);

        final Graphics2D g = imageCopy.createGraphics();
        g.setColor(highlighterColor);

        for (final Point pixel : pixels) {
            // the middle of the block should be our pixel to make it marker like
            int x = pixel.x - (markingSizeX / 2);
            int y = pixel.y - (markingSizeY / 2);

            // avoid negative values
            x = x < 0 ? 0 : x;
            y = y < 0 ? 0 : y;

            g.fillRect(x, y, markingSizeX, markingSizeY);
        }

        g.dispose();

        // mark the pixels on the new background
        for (final Point pixel : pixels) {
            imageCopy.setRGB(pixel.x, pixel.y, pixelEmphasizeColor.getRGB());
        }

        return imageCopy;
    }

    /**
     * Creates another image, which is a copy of the source image
     * 
     * @param source
     *            the image to copy
     * @return a copy of that image as <b>BufferedImage</b>
     */
    protected static BufferedImage copyImage(final BufferedImage source) {
        // Creates a fresh BufferedImage that has the same size and content of
        // the source image

        // if source has an image type of 0 set ARGB as type
        int imageType = source.getType();
        if (imageType == 0) {
            imageType = BufferedImage.TYPE_INT_ARGB;
        }

        final BufferedImage copy = new BufferedImage(source.getWidth(), source.getHeight(), imageType);
        final Graphics g = copy.getGraphics();
        g.drawImage(source, 0, 0, null);
        g.dispose();
        return copy;
    }
}

Related

1. generateScaledImage(final BufferedImage bufImg, @SuppressWarnings("unused") final Object hintsArg, final int size)
2. makeBrighterRectangleOnImage(BufferedImage image, int leftPosition, int topPosition, int width, int height, double scaleFactor, Color borderColor, Stroke borderStroke)
3. makeOval(BufferedImage input, int width, int height)
4. makeTarget(BufferedImage image, int x, int y, int width, int height)
5. mapByteBuffer(File cachedFile, int cacheFileSize)
6. markDifferencesWithBoxes(final BufferedImage image, final Point[] pixels, final int markingSizeX, final int markingSizeY)
7. maybeGrow(List l, int size)
8. needsThumbnail(BufferedImage image, int newSize)
9. newArgbBufferedImage(int width, int height)