ILLEGAL MOTOR VEHICLE WHISTLING CANDID PHOTOGRAPHY SYSTEM BASED ON IMAGE REGISTRATION

摘要

The invention discloses a system for capturing vehicle horn based on image pairing, includes an integrated microphone array configured to acquire audio and an image in real time, a high-definition camera configured to acquire a high-resolution image in real time, a control unit, and an image pairing system. The invention also discloses an image pairing method based on the above system, including the steps of: obtaining a feature point and a feature point descriptor of two frame images by acquiring a low-resolution image and a high-resolution image at the same time respectively; obtaining feature point similarity by calculation of a feature point descriptor; obtaining six pairs of feature points of the two frame images, in which the six pairs of feature points have the highest similarity and positions are fixed on an image, as matching feature points based on feature point similarities ranking, or manually selecting six pairs of feature points as matching feature points; and calculating an inter-image transformation coefficient of the two frame images via linear coordinate transformation to achieve accurate calibration of a horn snapshot system. The invention can calibrate relative position information of the integrated microphone array and the high-definition camera automatically and accurately. According to the invention, the positions of the integrated microphone array and the high-definition camera can be calibrated after triggered by the vehicle horn each time.