the tiger's posture. They then go on to compare the new pattern with previous patterns stored in a library and display the most likely matches. Suitable images may be from researchers, tourists or camera traps and the resulting database of match results can be used to provide the usual benefits of mark/recapture studies: monitoring of population size and other parameters, determining the fate of individual animals, encouraging cooperation between different research groups and so on. This system is also being developed to trace the origin of skins, simply by emailing a digital image of the skin to a central catalogue.

Automated Photo-id for tigers. Funding for the development of this software was provided by a The Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, New York 10460.


The pictures on this page illustrate the process of scanning a stripe pattern from the flank surface of tiger image. By fitting a 3D surface model to the tiger image our programs capture a pattern that is unaffected by the camera angle or













To try out the software first unzip the contents of the following "tiger_demo_folders.zip" file to your c: drive (or any drive which is backed up regularly) , where it will make a "c:\tiger_demo\" folder with a number of subfolders containing sample images and pattern extracts. The "c:\tiger_demo\" folder will also contain an Access database called "tiger_demo.mdb".


Then open the "ExtractCompare_install.zip" file and double-click the "setup.exe" program. Please answer "yes" to retain any files that would otherwise be overwritten by older files.


files last updated 23 June 2010






Matching photo identified by the ExtractCompare program and displayed for visual confirmation

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