Name
Title | ||
|---|---|---|
Distributed source coding authentication of images with contrast and brightness adjustment and affine warping. |
Abstract | ||
|---|---|---|
Media authentication is important in content delivery via untrusted intermediaries, such as peer-to-peer (P2P) file sharing. Many differently encoded versions of a media file might exist. Our previous work applied distributed source coding not only to distinguish the legitimate diversity of encoded images from tampering but also to localize tampered regions in an image already deemed to be inauthentic. In both cases, authentication requires a Slepian-Wolf encoded image projection that is supplied to the decoder. We extend our scheme to authenticate images that have undergone contrast, brightness, and affine warping adjustment. Our approach incorporates an ExpectationMaximization algorithm into the Slepian-Wolf decoder. Experimental results demonstrate that the proposed algorithm can distinguish legitimate encodings of authentic images from illegitimately modified versions, despite arbitrary contrast, brightness, and affine warping adjustment, using authentication data of less than 250 bytes per image. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1109/PCS.2009.5167473 | PCS |
Keywords | Field | DocType |
slepian-wolf decoder,encoded image,arbitrary contrast,brightness adjustment,media authentication,authentication data,affine warping adjustment,encoded version,index terms— image authentication,expectation maximization,slepian-wolf encoded image projection,authentic image,expectationmaximization algorithm,distributed source coding,transform coding,file sharing,authentication,public key cryptography,brightness,source coding,bismuth,pixel,decoding,message authentication,unsupervised learning,image reconstruction,p2p,expectation maximization algorithm,image resolution | Affine transformation,Computer vision,Authentication,Image warping,Message authentication code,Source code,Computer science,Transform coding,Theoretical computer science,Artificial intelligence,Distributed source coding,Image resolution | Conference |
Citations | PageRank | References |
3 | 0.38 | 9 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yao-chung Lin | 1 | 119 | 11.14 |
| David P. Varodayan | 2 | 513 | 32.71 |
| Bernd Girod | 3 | 8988 | 1062.96 |