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Index › Programming Questions & Help › Syntax Questions › writing an image from data
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writing an image from data (Read 312 times)
rule110
writing an image from data
Dec 29th, 2007, 10:32pm  
Is there a way to convert an array/matrix of numbers to a bitmap or jpeg?
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JohnG
Re: writing an image from data
Reply #1 - Dec 29th, 2007, 11:29pm  
Yes, fairly easily.

Code:
//asuming your numbers stored in an array called myInts

PImage img=new PImage(newWidth,newHeight);
for(int i=0;i<myInts.length;i++)
{
  img.pixels[i]=myInts[i]; //assuming they're already in ARBG format
}
img.updatdPixels();
image(img,0,0);
saveFrame("myimage.jpg");


If your numbers are just a simple value and you want it to be greyscale you need to change the img.pixels[i]= line to something like:

Code:
int pixel=(myInts[i]<<16)+(myInts[i]<<8)+myInts[i];
img.pixels[i]=pixel;
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