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Perceptual image suite open-source tools for journalists |
by QuaDet [contact] |
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![](figs/tools-analysis.png) |
perceptual image analysis |
- intuitive forensics tools for images
- the analysis done within your browser
- extension for: Firefox, Chrome
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![](figs/tools-search.png) |
perceptual image search |
- images sent to search servers even from private sites
- support for altering of the searched images
- extension for: Firefox, Chrome
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Perceptual image analysis (source code)
- helps at assessing of images from the point of view of possible alterations of the images, that is: is it real or fake?
- extracts meta data (exif, headers), analyses levels and variations of colors and luminosity, applies PCA and the error-level analysis.
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![the "EXIF" part of the image analysis](figs/screenshot-exif-640.jpeg) |
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![the "Slopes" part of the image analysis](figs/screenshot-slopes-640.jpg) |
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![the "ELA" part of the image analysis](figs/screenshot-ela-640.jpg) |
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Perceptual image search (source code)
- facilitates search by images even from private sites, including search by altered forms of the images.
It can help in assessing of the images, the question here is: had anyone posted a form of the image?
- and the Perceptual image analysis extension can help to find out since when the images are online then.
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![search by images from private sites](figs/screenshot-file-640.jpg) |
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![search by altered images](figs/screenshot-flip-640.jpg) |
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