Here you can find the source of overlapsPoints(BufferedImage inImage, int inX, int inY, int inWidth, int inHeight, Color inTextColour)
| Parameter | Description |
|---|---|
| inImage | image to test |
| inX | left X coordinate |
| inY | bottom Y coordinate |
| inWidth | width of rectangle |
| inHeight | height of rectangle |
| inTextColour | colour of text |
public static boolean overlapsPoints(BufferedImage inImage, int inX, int inY, int inWidth, int inHeight, Color inTextColour)
//package com.java2s; //License from project: Open Source License import java.awt.Color; import java.awt.image.BufferedImage; public class Main { /**/*from ww w . j a v a 2s .c o m*/ * Tests whether there are any dark pixels in the image within the specified x,y rectangle * @param inImage image to test * @param inX left X coordinate * @param inY bottom Y coordinate * @param inWidth width of rectangle * @param inHeight height of rectangle * @param inTextColour colour of text * @return true if the rectangle overlaps stuff too close to the given colour */ public static boolean overlapsPoints(BufferedImage inImage, int inX, int inY, int inWidth, int inHeight, Color inTextColour) { // each of the colour channels must be further away than this to count as empty final int BRIGHTNESS_LIMIT = 80; final int textRGB = inTextColour.getRGB(); final int textLow = textRGB & 255; final int textMid = (textRGB >> 8) & 255; final int textHigh = (textRGB >> 16) & 255; try { // loop over x coordinate of rectangle for (int x = 0; x < inWidth; x++) { // loop over y coordinate of rectangle for (int y = 0; y < inHeight; y++) { int pixelColor = inImage.getRGB(inX + x, inY - y); // split into four components rgba int pixLow = pixelColor & 255; int pixMid = (pixelColor >> 8) & 255; int pixHigh = (pixelColor >> 16) & 255; //int fourthBit = (pixelColor >> 24) & 255; // alpha ignored // If colours are too close in any channel then it's an overlap if (Math.abs(pixLow - textLow) < BRIGHTNESS_LIMIT || Math.abs(pixMid - textMid) < BRIGHTNESS_LIMIT || Math.abs(pixHigh - textHigh) < BRIGHTNESS_LIMIT) { return true; } } } } catch (NullPointerException e) { // ignore null pointers, just return false } return false; } }