Page Details:
Looks Like It - The Hacker Factor Blog
http://www.hackerfactor.com/blog/index.php?/archives/432-Looks-Like-It.htmlPerceptual hashes are a different concept compared to cryptographic hash functions like MD5 and SHA1. With cryptographic hashes, the hash values are random. The data used to generate the hash acts like a random seed, so the same data will generate the same result, but different data will create different results. Comparing two SHA1 hash values really only tells you two things. If the hashes are different, then the data is different. And if the hashes are the same, then the data is likely the same. (Since there is a possibility of a hash collision, having the same hash values does not guarantee the same data.) In contrast, perceptual hashes can be compared -- giving you a sense of similarity between the two data sets.
Tags: programming, algorithm, graphics, image, algorithms, hash, search, howto, development, images Saved by: admin
Body By Victoria - Secure Computing: Sec-C
The first disaster is obvious, which is what makes it so wonderful. The model used to be holding a handbag, now she is just holding the straps. In fact, the handbag could be their Ostrich-print logo satchel, stud tote, or embossed leather tote -- all have the same kind of straps. -- What is more fun is how the artist erased the bag. Notice how the ground is made of red tiles. The tiles are square... except where the handbag used to be located. Clearly the artist did not pay attention to detail since they forgot the grout when they copied in the tiles.
http://www.hackerfactor.com/blog/index.php?/archives/322-Body-By-Victoria.html
Tags: photoshop, forensics, analysis, photography, graphics, image, detection, design, manipulation, howto Saved by: admin
The first disaster is obvious, which is what makes it so wonderful. The model used to be holding a handbag, now she is just holding the straps. In fact, the handbag could be their Ostrich-print logo satchel, stud tote, or embossed leather tote -- all have the same kind of straps. -- What is more fun is how the artist erased the bag. Notice how the ground is made of red tiles. The tiles are square... except where the handbag used to be located. Clearly the artist did not pay attention to detail since they forgot the grout when they copied in the tiles.
http://www.hackerfactor.com/blog/index.php?/archives/322-Body-By-Victoria.html
Tags: photoshop, forensics, analysis, photography, graphics, image, detection, design, manipulation, howto Saved by: admin