Correction for wide-angle view distortion

lazyleopard · Post by **lazyleopard** » Sun May 02, 2004 9:38 am

Another back-burner idea: Is there some correction that could be applied to local camera images to correct for the distortion caused by wide-angle lenses and cameras viewing an area from an elsvated position?

Post by **zoneminder** » Sun May 02, 2004 5:28 pm

Corrections could be applied, however I'm not sure they would be all that useful generally. Transformations like these would like involve floating point arithmetic and so probably be quite slow. Plus you'd end up with blank areas of the image as other parts are transformed in. Finally, there would also have to be an easy way of defining the change, something like all the screen modifications you can make in an OSD for a monitor I guess.

Is there any particular function you'd need this for?

lazyleopard · Post by **lazyleopard** » Mon May 03, 2004 11:06 am

Was more a might-be-nice-to-have idea than a firm need. I've got one camera with a 90-degree lens, and the field distortion at the corners is quite severe.

malvo · Post by **malvo** » Mon May 03, 2004 7:55 pm

Have a look at

http://www.opensourcelab.it/trade/productview/10/5/

perhaps they have a filter you need and ZoneMinder can get the images from a loopback