| 摘要 |
Systems, methods and articles of manufacture for establishing true authorship of a master resolution image are described herein. Embodiments of the present invention relate to reducing unauthorized copying of images posted for public display on image transaction sites where posted images for sale by true authors are susceptible to unauthorized copying by oilier individuals, Further embodiments allow a true author to post a master resolution version of the image in a secured area of the image transaction site that is shielded from public viewing while posting a downgraded version of the image in a public viewing area of the image transaction site. In one embodiment, an unauthorized copy is verified when the unauthorized copy is a copy of the downgraded version of the image in the public viewing area so when compared to the master resolution version, the image can be verified as an unauthorized copy of the downgraded version.
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