Find Out if a Photo Has Been Retouched

Web 2.0 has democratized the creation and sharing of different types of content (texts, videos, images). With the resurgence of increasingly easy-to-use tools, retouching and photo/video editing is within everyone’s reach. It is now difficult to detect the true from the false in what is published every second online. Director and screenwriter Andrew Niccol summed it up very well.  Our ability to create fakery has exceeded our ability to detect it.  The observation is fortunately not completely true since there are tools to detect fakes, especially on photos. We were able to realize the phenomenon during hurricane Sandy. Much older images but also montages have gone around the web.

Different Types of Content

 

For this, the site analyzes the different compression levels of an image in order to highlight any changes. The process is called ELA . And will show you an image with its different “error levels”. Here is an example, with the famous assembly of the Statue Mexico WhatsApp Number of Liberty just before the passage of Hurricane Sandy: The white areas indicate different levels of compression but also significant differences in color tone. It is therefore necessary to learn how to analyze this data and to take an interest in particular in the compression rate of the photo. The level of error is higher on low quality photos, so make sure to analyze the least compressed photos possible (85-90% minimum).

The White Areas Indicate Different Levels

Mexico WhatsApp Number
Mexico WhatsApp Number

 

For this, it is quite appropriate to obtain the source image because an image resized and published, even automatically by Twitter or your blog, will necessarily have undergone additional compression. Foto Forensics therefore makes it possible to detect montages but also retouching made on colors, brightness and contrast. A tutorial section explains the procedure to follow to correctly interpret the results and discover the different uses of the tool. In particular, there is a complete explanation of JPG compression as well as the metadata (exif) of a photo . An effective tool and comprehensive resources, Foto Forensics will help you detect fake on the Internet. Given the abundance of fake photos published, it would be wrong to deprive yourself of them.

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