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Mirror/flip image (Read 4748 times)
staer
Mirror/flip image
Sep 7th, 2008, 1:50pm  
Is there a simple way to flip video capture on the y-axis/horizontally?? I have managed to flip the video entirely, so the whole thing is upside down, but this obviously defeats the purpose. There a couple examples included which do flip the image, titled Mirror and Mirror2, but they continue on to distort the image. Ideally I would like to flip the image and then apply some sort of Brightness tracking (tracking or threshold, really would like this end to be open for me to do whatever I need to).

So, are there any examples/tutorials/etc that simply flip live video capture?
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antiplastik
Re: Mirror/flip image
Reply #1 - Sep 9th, 2008, 10:27pm  
something like that maybe?

Code:
for (int y = 0; y < video.height; y++) {
 for (int x = 0; x < video.width; x++) {
  pixels[(video.height-y-1)*video.width+x] = video[y*video.width+x];
 }
}
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WWW  
staer
Re: Mirror/flip image
Reply #2 - Sep 10th, 2008, 10:33pm  
Yeah not bad but it flips the image on the x-axis, which is not what I want. I want to flip it on the y-axis - a horizontal flip. So that when a user is looking into the screen if they move right the image moves right, left if they move left, and so on.
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kaworuonline
Re: Mirror/flip image
Reply #3 - Sep 15th, 2008, 6:00pm  
You can see example in Processing Library
http://processing.org/learning/libraries/mirror.html
Or try the code below
Enjoy!

 loadPixels();
   // Begin loop for width
   for (int i = 0; i < width; i++) {
     // Begin loop for height
     for (int j = 0; j < height; j++) {    
       pixels[j*width+i] = img[(width - i - 1) + j*width]; // Reversing x to mirror the image

     }
   }
 updatePixels();
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staer
Re: Mirror/flip image
Reply #4 - Sep 17th, 2008, 11:42am  
Hmm, was just looking at that code. Will try that out, thanks.
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