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47results about How to "Good for target recognition" patented technology

Passive non-cooperative target positioning method based on distributed irradiation source

The invention provides a passive non-cooperative target positioning method based on a distributed irradiation source. In the method, a non-cooperative target is detected through a plurality of irradiation sources distributed in space, and a multi-point ranging positioning technology is utilized at a receiving end so as to acquire three-dimensional position information of the non-cooperative target. At the receiving end, a system works in a passive mode and has higher stealth performance and higher target positioning accuracy. The defect that positioning accuracy of the traditional passive positioning technology is limited by operating wavebands and the size of receiving antennas is overcome, a high-precision three-dimensional position of the non-cooperative target can be acquired even in a lower operating waveband, and the detection and the tracking of a stealth target is facilitated. In addition, by the method, a three-dimensional speed of the target can be extracted from the three-dimensional position information of the non-cooperative target; and compared with the traditional radar which can only acquire the radial speed of the non-cooperative target, the method contributes to target identification. Finally, a receiving end system has a simple structure, a passive detection function can be realized by additionally arranging a signal processing module on the basis of the conventional radar system, and the system has lower cost and is convenient to upgrade and reform on a large scale.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Infrared target detection method based on space-time cooperation framework

The invention relates to an infrared target detection method based on a space-time cooperation framework. The method comprises the following steps: 1. acquiring a background frame Bg and a current frame Ft of a video, combining the background frame Bg and the current frame Ft to carry out background clutter suppression and acquiring a background suppression graph Gt after the background clutter suppression is performed; 2. for the background suppression graph Gt obtained in the step 1, firstly establishing a space-time background model, and then carrying out target positioning aiming at space-time background model information after the model is established; 3. according to an imaging mechanism of the infrared target, analyzing a space difference of the infrared target and the surrounding background, using a fuzzy adaptive resonance nerve network to carry out local classification aiming at the target which is positioned in the step 2 and then extracting the infrared target. The method has the following advantages that: the method does not depend on any target shapes and motion information priori knowledge; the method is suitable for a complex outdoor scene; a signal to noise ratio can be increased; a target detection rate can be increased and a calculated amount can be reduced; false targets can be effectively removed and a false alarm rate can be reduced; the method is beneficial to follow-up target identification.
Owner:WUHAN UNIV

Method and device for automatic detection of foreign objects between screen doors and trains of straight-line subway platform

The invention discloses an automatic detection method and a device of foreign bodies between a linear subway platform shielded gate and a train. Main components comprise a light band, a camera, a display and a computer system. The light band is arranged on a gap belt between the train and the platform shielded gate at the end of the platform. The camera is arranged on an unoperated position of a head of the train or a platform of the front. The camera and the light band are conplane. The camera shoots gap images and light band images between the shielded gate and the train, sharpness of the gap images are strengthened through image processing techniques, the foreign bodies in a gap are detected, and results are sent to a driver and a subway system through the display. Real-time high definition gap images and foreign bodies detection results are provided, and system reliability is improved. The driver has no need to get off and can finish detection tasks, stopping time is reduced, and subway operating efficiency is improved. Artificial detection manners are kept completely, and therefore even though a detection device has a breakdown, normal operation of the subway cannot be influenced.
Owner:SOUTH CHINA UNIV OF TECH +1
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