Tags, photographic tampering
15.10.–15.12.2015
4. Photo Forensics: As Seen on CSI

A digital camera contains a vast array of sensor cells, each with a photo detector and an amplifier. The photo detectors measure incoming light and transform it into an electrical signal. The electrical signals are then converted into pixel values. In an ideal camera, there would be a perfect correlation between the amount of light striking the sensor cells and the pixel values of the digital image. Real devices have imperfections, however, and these imperfections introduce noise in the image. mehr

Veröffentlicht: 27.11.2015
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1. Photo Forensics: From Stalin to Oprah

We know to be wary of the photo hoaxes that litter the online landscape, the impossibly perfect women in fashion magazines, and the scandalous images in tabloids. But can we trust photographs in reputable news outlets, prestigious scientific journals, and government publications? In this series of posts, I will examine how the ubiquity of photographic tampering has eroded our faith in images. I will also discuss recent technological advances in the field of photo forensics that have the potential partially to restore this faith.

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Veröffentlicht: 15.10.2015
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