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POgiven two images, determine whether one is edited from the other (and which is the original)
 

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  1. POgiven two images, determine whether one is edited from the other (and which is the original)
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    <p>suppose there is an image on web without watermark. And someone downloads it and makes some edits on it like adding watermark etc etc. Is it possible to write a script in php to compare these two images. Like when I submit these two images to the script, it should be able to output the original image and manipulated image. </p> <p>I read google's webmaster page which says</p> <blockquote> <p>Google often finds multiple copies of the same image online. We use many different signals to identify the original source of the image Blockquote</p> </blockquote> <p>This is the main concern of my question</p> <p>One more doubt is will there be any meta tags inside an image. if at all how to read them. Is it possible to edit them. Are there any information(not visual) inside an image which cannot be edited.</p>
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    1. USKrishna Deepak
    1. USKrishna Deepak
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      1. VTUpMod
    1. COWhat you're looking for is VERY hard to accomplish (if not impossible today).
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      1. USPaul Dessert
    2. COHave a look at http://stackoverflow.com/questions/4477417/how-to-work-out-two-imagess-degree-of-similarity-using-php and the links over there...
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      1. USChristopheD
    3. COIf you find information inside an image which cannot be edited my hex editor says she would like to have a look.
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      1. USJon
 

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