数字图形和识别（Digital graphics and recognition）.doc

数字图形和识别（Digital graphics and recognition） Digital image authentication 2008-07-25 09:37:19| classification: default classification | Tags: | font in Small subscription The photos of the big money countless examples in history. Some people change their photos to make their image more attractive, while others try to remove people or things they dislike from pictures. Previously, fake photos need to be released through the tedious operation to a few hours in the dark room; today, anyone with a computer, can be as easy as blowing off dust and forged fake photos, very clever, very difficult to find out others. There are several traces of the change in this picture. Using the digital forensics techniques described later, we can find where these hands are made. (see below.) Almost every month, there is a fake picture exposure. In February, a photograph showing the endangered Tibetan antelope (Tibetanantelope) passing through the Qinghai Tibet railway bridge was pulled out. In this award-winning photo, the new high-speed train roared past, while the Tibetan antelope seemed to have nothing to do with it. Hundreds of Chinese media reproduced this picture in 2006 to celebrate the opening of the Qinghai Tibet railway. But soon it was noticed in the picture: the odd part of the Tibetan antelope is pregnant ewe lamb, but could not see, that season at the opening of the Qinghai Tibet railway, they should have a lamb. This year, after the photo was shown publicly in the Beijing metro, more flaws were pulled out, such as the stitching of two photos. Thus, people openly questioned. After the incident, the photo producer Liu Weiqiang was his Daqing evening news agency dismissed, and the newspaper editor also resigned. Chinas official news agency made a public apology and promised to remove all photos taken by Liu Weiqiang from the database. Like many other infamous photo forgery events, some highly vigilant people have carefully observed and found such flaws in this fraudulent case. H