PhotoDetective: Image Forensic Toolkit

What is PhotoDetective?

What can PhotoDetective do?

• Is the lighting direction consistent?


• Was the entire shot at the same focal length?


• Have some parts of the image been compressed more than others?


• What color filter array did the camera use to shoot the picture?


• What quality level was the image saved at?


• What quantization table was the image saved with?


• Has an image been recolored?


• Are the jpeg artifacts distributed equally across the image?


• Is an area naturally or artificially blurred?


• What colors are the same in image?


• Does the image contain a hidden thumbnail of itself?


• Has the contrast been enhanced?


• What is the Exif Information?


• Is the camera clipping image colors?

How does PhotoDetective work?

• Principal Component Analysis to detect consistency among artifacts in the image


• Wavelet decomposition analysis to detect whether the image is all at the same focal length


• Edge detection routines to identify naturally blurred vs. artificially blurred areas (used to covered up tampering)


• Error level analysis to detect whether parts of the image come from sources with different error potential (i.e., two different images)


• Noise enhancement to make small artifacts more visible


• Local Min/Max pixel highlighting to determine if the pixels errors display a normal variation


• Lighting gradient coloration to visually show where the light is coming from in an image, and is it consistently in one direction


• Temperature Pseudocolor based on pixel intensity to identify odd or inconsistent coloration


• Pixel color randomization to show pixels that have the same RGB value more easily


• Extreme color highlighting to show where the pixels are pure white and black and if the colors are being clipped by the camera


• Thumbnail extraction from image to show what the picture might have originally looked like before manipulation


• Displaying Exif information to display properties concerning the image's history Extraction of Quantization tables used to save the image


• Minimum-Medium-Maximum RGB value for each pixel to identify coloration inconsistencies Save quality estimation to know what amount of compression has been used on the image.


• Display the histogram of colors to see if a contrast filter has been applied


• Color Filter Array Estimation to know what color filter arrangement the specific camera uses to interpolate the colors

What can I do with PhotoDetective?

• Detectives interested in demonstrating whether an image is edited or authentic can perform a variety of routines that address specific types of alterations.


• Images of the human body in advertising are commonly edited to present a completely unrealistic standard of beauty; much of this editing can be exposed using our tool.


• Digital archivists can learn more about the authenticity of images.


• Consumers hesitant about purchasing a product can now be more informed if preview images have been altered to hide faults and defects.


• Insurance agencies interested in determining whether a claim is fraudulent can do so at the press of a button.

Why PhotoDetective?

System Specifications

• Operating System: Windows XP, Vista, 7, 8, 10


• Architecture: Compatible with 32-bit or 64-bit systems


• Minimum Hard drive space required: 176 MB


• Minimum Ram required: 4GB

Purchase

• $30.00 USD


• Perpetual License


• No Digital Rights Management Restrictions