Re: [Image-SIG] RMS difference patch

2008-01-16 Thread Douglas Bagnall
I wrote: > 2 ** (31-20) ** 0.5 > 9.9633077752473778 > > A pixel difference of 10 across the 1 megapixel image will wrap the sum > and crash. But now I've read it and it looks like it should have been >>> (2 ** (31-20)) ** 0.5 45.254833995939045 So, not so bad, but nonetheless a problem

Re: [Image-SIG] RMS difference patch

2008-01-16 Thread Douglas Bagnall
hi Noah > I have a patch that adds an RMS Difference method to the PIL. > Let me know if there is any interest in this. I originally wrote this to > help implement a video stabilization filter. You could also use > this to quantify how much a lossy compression algorithm distorts > an image relativ

[Image-SIG] RMS difference patch

2008-01-16 Thread Noah.org
I have a patch that adds an RMS Difference method to the PIL. Let me know if there is any interest in this. I originally wrote this to help implement a video stabilization filter. You could also use this to quantify how much a lossy compression algorithm distorts an image relative to some other com