image analysis

Ghost photos, Digital Image Ballistics / Forensics

This tutorial covers techniques for image analysis that are helpful in determining whether or not a photo has been edited / tampered in any way. Analysis of EXIF files and image quantization tables are covered. Both techniques will also work for images manipulated with “ghost photo” apps.

Image Analysis: A Spectral Selectivity Metric

A digital image can be treated as a data set to extract information. Each pixel's intensity value is a measure of how much energy was used to generate it within the band of spectrum used to produce the image. The sum of the pixel intensities is a measure of the total energy used to create … Read moreImage Analysis: A Spectral Selectivity Metric