When you use the wide lens for motion detection in any reasons such as limited exhibition space, you can see the image distortion ( Image 001 ) on the each edge of video image. To prevent this, I’ve used lens correction Patch ( Thanks to Liubo )

(Image 001 )
When you open this patch, you can see “CHANGE HERE”. You can change the number depending on your lens or camera. Then, you can see the straight image like ( Image 002 ). In my case, I put ’0.4′ instead of ’0′.


( Image 002 )
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