Scan screen for color

Question

I would like, in Java, to scan the screen for a particular color.

Any idea how to do that?

Thought so. This was one of the first approaches used for a game I used to play. The textures could be swapped around for with ones that had solid colour and an external program would scan the screen. It became obsolete when someone found a way to access variables directly in memory. — James P., Jun 25 '10 at 07:07

Romain Hippeau · Accepted Answer · 2010-06-14T11:25:20.283

14

    Robot robot = new Robot();
    Rectangle captureSize = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
    BufferedImage bufferedImage = robot.createScreenCapture(captureSize);
    // ...

    int color = image.getRGB(x, y);

    int  red = (color & 0x00ff0000) >> 16;
    int  green = (color & 0x0000ff00) >> 8;
    int  blue = color & 0x000000ff;
    // ...

edited Jun 14 '10 at 11:25

answered Jun 13 '10 at 19:15

Romain Hippeau

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@Reuben Mallaby The joys of cut and paste. color, you are finding the r g and b values from the color. I updated my post – Romain Hippeau Jun 13 '10 at 20:03
@Thorbjørn Ravn Andersen - To fix the Robot – Romain Hippeau Jun 14 '10 at 02:29
Romain, "_why_" refers to you swallowing the exception instead of doing an `e.printStackTrace()`. – Thorbjørn Ravn Andersen Jun 14 '10 at 06:28

score 2 · Answer 2 · answered Jun 13 '10 at 19:10

2

Use Java.awt.Robot to take a screenshot as an Image and proceess that.

answered Jun 13 '10 at 19:10

Thorbjørn Ravn Andersen

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Scan screen for color

2 Answers2