Count pixels

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TheC0der - 23 Aug 2006 11:15 GMT

Hello everybody!
I need to know how many white(or other colors) pixels are in Graphics,
but i didnt found way :(. I see that there is solution for Image, but
this cant help me.
I have one more question - (may be is silly) How to copy Image to
Graphics and Graphics to Image?
Thanks for your attention.

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Ingo R. Homann - 23 Aug 2006 12:03 GMT

Hi,

> Hello everybody!
> I need to know how many white(or other colors) pixels are in Graphics,
> but i didnt found way :(. I see that there is solution for Image, but
> this cant help me.
> I have one more question - (may be is silly) How to copy Image to
> Graphics

g.drawImage();

> and Graphics to Image?

AFAIK impossible. The solution is to create an Image, to get its
Graphics and to paint on this graphics.

Hth,
Ingo

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Josh Falter - 24 Aug 2006 14:20 GMT

Disclaimer: There may be a slick way to do the counting of white
pixels, but off the top of my head I know that java.awt.Robot has a
getPixelColor(x,y) function that you could use if you got desperate.

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Oliver Wong - 24 Aug 2006 18:31 GMT

Think of the Graphics object as a pen, and the Image object as a sheet
of paper. You use the Graphics object to draw on the Image, just like you
use a pen to draw on a paper. However, the Graphic object itself does not
store the picture your drew, just like the pen doesn't store the picture.
The picture is stored on the paper, or the Image object.

- Oliver

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Count pixels

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