GoFuckYourself.com - Adult Webmaster Forum - View Single Post - GFY EDUCATIONAL SERIES: How to prevent Piracy

Nathan · 10-10-2010, 11:55 PM

borked, very nice...

now, if we could only setup our own industry wide video fingerprinting so we do not have to pay some company to run it, that would be lovely... q is, can we without using some patent that possibly exists?

Your current hashes, they change if the image is resized (preserving aspect) or lowered in quality, right? So how can we build hashes which are still accurate enough but do not care about resizing or quality loss?

Any thoughts on that?

I am wondering if changing resolution of an image to a very low number, like 50x50 or so, if the colors would get close enough together regardless of how the image is cut or changed in quality?

IE, take a square part of the inside of an image of around 1000x1000, re-size it to 50x50 using a standard re-size technique which interpolates the colors.

Then use this on two versions of the same image, jpeg at 100 and jpeg at 50% quality.. and see what happens to the outcome, compare it visually...

10-10-2010, 11:55 PM
Nathan Confirmed User Industry Role: Join Date: Jul 2003 Posts: 3,108	borked, very nice... now, if we could only setup our own industry wide video fingerprinting so we do not have to pay some company to run it, that would be lovely... q is, can we without using some patent that possibly exists? Your current hashes, they change if the image is resized (preserving aspect) or lowered in quality, right? So how can we build hashes which are still accurate enough but do not care about resizing or quality loss? Any thoughts on that? I am wondering if changing resolution of an image to a very low number, like 50x50 or so, if the colors would get close enough together regardless of how the image is cut or changed in quality? IE, take a square part of the inside of an image of around 1000x1000, re-size it to 50x50 using a standard re-size technique which interpolates the colors. Then use this on two versions of the same image, jpeg at 100 and jpeg at 50% quality.. and see what happens to the outcome, compare it visually... __________________ "Think about it a little more and you'll agree with me, because you're smart and I'm right." - Charlie Munger