CODEWITHSUNDEEP
javaarraysimagecolors
jalgames
jalgames

Reputation: 789

Converting Image to Color array

I load an image in Java and want to convertit to a RGB-Array so I can read the color of each single pixel. I searched on Google, but I only found how to convert Color-Arrays to Images.

Upvotes: 3

Views: 6739

Answers (1)

stacker
stacker

Reputation: 68962

The following lines illustrate the usage of the API methods:

BufferedImage bi = ImageIO.read( new File( "image.png" ) );
int[] data = ( (DataBufferInt) bi.getRaster().getDataBuffer() ).getData();
for ( int i = 0 ; i < data.length ; i++ ) {
    Color c = new Color(data[i]);
    // RGB is now accessible as
    c.getRed();
    c.getGreen();
    c.getBlue();
}

If you face issues due to the color model, create a copy first

BufferedImage img2 = new BufferedImage( bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_INT_RGB );

img2.getGraphics().drawImage( bi, 0, 0, null );

and use img2 in the above code.

Upvotes: 3

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