We developed new real-time algorithm, based on the correlation function, for the detection of cancelled objects by using computer processing of the passive THz images without their viewing. This algorithm allows us to make a conclusion about presence of forbidden objects on the human body. To see this object with high quality we propose one more algorithm which allows to increase the image quality. Current approach for computer processing of the THz images differs from approaches developed by us early.
We apply new algorithms with success to the images captured by passive THz camera TS4 manufactured by ThruVision Inc. The distance between the camera and person is changed from 4 to 10 metres.