Projective Transformation

Viinex offers the video projective transformation feature for partners who use the middleware with Optical Character Recognition (OCR) algorithms. This feature changes the image plane of codes geometrically to improve legibility and prepare the video for further processing.

In some cases, it’s not feasible to position a camera in a way that would provide a sufficient angle for the OCR algorithms to recognize symbols. In such cases, Viinex’s resulting image can be rotated to enhance symbol legibility.

Additionally, this scenario can be useful in situations such as parking lots or toll road checkpoints where vehicles are tailgating. The resulting images of license plates can be difficult to recognize as the license plates are seen at the very last moment and at a bad angle, but the projective transformation feature can help, for example, with a simultaneous second stream from the same IP camera used for license plate recognition.