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It's probably not something like MD5 or SHA1 since they're dealing with images. More like http://research.microsoft.com/... which says:

The algorithm uses randomized signal processing strategies for a non-reversible compression of images into random binary strings, and is shown to be robust against image changes due to compression, geometric distortions, and other attacks.

or

http://www.hackerfactor.com/bl...

Every perceptual hash algorithm that I have come across has the same basic properties: images can be scaled larger or smaller, have different aspect ratios, and even minor coloring differences (contrast, brightness, etc.) and they will still match similar images.

First, there are been two main anonymous persons claiming that the birth certificate was faked based on image analysis of the short form. These have been debunked twice. The main problem with the claim is that an image analysis cannot tell you whether the birth certificate is "counterfeit" but only if the image of the certificate has been altered. Another reasoned look at the image analysis reveals that the image has been altered only in one area: where the certificate number was blacked out. The rest of the so called image analysis relies on highly flawed analysis like the fact that when zooming on a low resolution image it produces pixelation which proves the image was faked. These two so-called anonymous experts have never had their credentials vetted but their claimed expertise has shown not to withstand a true expert in the field.

When the long form was released, there were similar claims. These were debunked as well.

Second, the State of Hawaii has released and verified the long and short form certificates as far back as 2008. So according your definition of sane and rational person, they would have to discount the State of Hawaii (whose Republican governor in 2008 said Obama was born there) to believe that the birth certificates have been faked. That's not sane or rational.

First, there are been two main anonymous persons claiming that the birth certificate was faked based on image analysis of the short form. These have been debunked twice. The main problem with the claim is that an image analysis cannot tell you whether the birth certificate is "counterfeit" but only if the image of the certificate has been altered. Another reasoned look at the image analysis reveals that the image has been altered only in one area: where the certificate number was blacked out. The rest of the so called image analysis relies on highly flawed analysis like the fact that when zooming on a low resolution image it produces pixelation which proves the image was faked. These two so-called anonymous experts have never had their credentials vetted but their claimed expertise has shown not to withstand a true expert in the field.

When the long form was released, there were similar claims. These were debunked as well.

Second, the State of Hawaii has released and verified the long and short form certificates as far back as 2008. So according your definition of sane and rational person, they would have to discount the State of Hawaii (whose Republican governor in 2008 said Obama was born there) to believe that the birth certificates have been faked. That's not sane or rational.

In theory, since a movie is just a series of still frames, the same techniques could be used to modify individual frames as are used to "photoshop" a still image, (albeit, tediously). You might find the tools and tutorials at this site of some help in analyzing individual frames: http://fotoforensics.com/

You might also find some of the information at the associated Hacker Factor blog of use: http://www.hackerfactor.com/blog/index.php?/categories/17-FotoForensics

http://www.hackerfactor.com/blog/index.php?/archives/428-After-Birth.html This is an analysis of Obama's long form birth certificate by an image analysis expert. Check his previous posts for details of his experience. He concludes that it is genuine.

There is an analysis of the screenshot at http://www.hackerfactor.com/blog/index.php?/archives/396-No-Nukes.html

The conclusion is that it is probably a screenshot of a wast water treatment plan, not a nuke facility.

Well, according to Gender Guesser, you come across as:
Genre: Informal
Female = 530
Male = 892
Difference = 362; 62.72%
Verdict: MALE
It's been going on for ages.

> As long as no individual app needs more than 4GB of memory you're (mostly) OK.

Yeah, but if you want to do some fun stuff, it's easy to use 6 GB of RAM in a single process. Though, to be fair, there are ways to cut that down significantly.

When the first vote came up to congress on 13-Feb-2008, the only thing covered on every news channel was the baseball steroids scandal. There was no mention of the congressional debate or vote.
http://www.hackerfactor.com/blog/index.php?/archives/151-Wag-The-Dog.html

When the revised bill came up to congress on 14-March-2008, it was not covered by the mass media. Instead, they repeatedly covered a "captured Al Qaeda leader"... who isn't a leader, wasn't captured recently, and isn't even missed by Al Qaeda.
http://www.hackerfactor.com/blog/index.php?/archives/164-No-Respect.html

If more people knew about the domestic spying bill, more people would be mad. And if more people knew about the government's manipulation of the mass media, more people would be furious.

When the first vote came up to congress on 13-Feb-2008, the only thing covered on every news channel was the baseball steroids scandal. There was no mention of the congressional debate or vote.
http://www.hackerfactor.com/blog/index.php?/archives/151-Wag-The-Dog.html

When the revised bill came up to congress on 14-March-2008, it was not covered by the mass media. Instead, they repeatedly covered a "captured Al Qaeda leader"... who isn't a leader, wasn't captured recently, and isn't even missed by Al Qaeda.
http://www.hackerfactor.com/blog/index.php?/archives/164-No-Respect.html

If more people knew about the domestic spying bill, more people would be mad. And if more people knew about the government's manipulation of the mass media, more people would be furious.