Projective transformation

To change the image plane a geometrical projective transformation can be used. This transformation can be performed to prepare the video for further processing by OCR algorithms like license plate recognition modules.

Sometimes it is impossible to place a camera in a way that would provide a sufficient angle for such algorithms to perform symbol recognition. In this case the resulting image made by Viinex will help to further rotate the image to make symbols readable for the algorithm.

This scenario can be used at a parking lot or at a toll road checkpoint, when a vehicle is tailgating another vehicle trying to pass, which makes the angle of visibility too wide. The images of license plates become too difficult for recognition. In this case, projective recognition can help, for example, a second stream from the same IP camera that is used for license plate recognition.