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Index › Programming Questions & Help › Syntax Questions › Is it possible to only save certain areas
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Is it possible to only save certain areas? (Read 380 times)
me_tun
Is it possible to only save certain areas?
Jun 19th, 2008, 2:31pm  
I'm mucking around with the facial detection libraries and thought is would be cool to write the faces out to a file using save() or the like for processing images made up from thousands of little faces.

Code:
 void drawFace() {
int [][] res = face.getFaces();
if (res.length>0) {
   for (int i=0;i<res.length;i++) {
	int x = res[i][0];
	int y = res[i][1];
	int w = res[i][2];
	int h = res[i][3];
	rect(x,y,w,h);


I'm not having much luck at the moment, is it possible?

The above code draws a rectangle around the faces nicely but I can't seem to get it to write just those areas out to files.

Thanks for your suggestions!
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PhiLho 
Re: Is it possible to only save certain areas?
Reply #1 - Jun 19th, 2008, 2:57pm  
You can create a PImage and copy the portion of screen there, then save it.
PImage subImage = createImage(subWidth, subHeight, RGB);
subImage.copy(bigImage, posX, posY, subWidth, subHeight, 0, 0, subWidth, subHeight);
subImage.save("one face.jpg");
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me_tun
Re: Is it possible to only save certain areas?
Reply #2 - Jun 19th, 2008, 3:10pm  
Thanks so much.  That's a good suggestion.

I just implemented it and it works great.
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fry
Re: Is it possible to only save certain areas?
Reply #3 - Jun 19th, 2008, 5:45pm  
it's simpler than that:

Code:
PImage sub = get(x, y, w, h);
sub.save("one.jpg");
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PhiLho 
Re: Is it possible to only save certain areas?
Reply #4 - Jun 19th, 2008, 6:59pm  
Cool!
It shows:
1) There are more than one way to skin a cat...
2) Processing is full of nice shortcuts, one just have to read the doc and remember it! Wink
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