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Studied in accordance with the technology of photoelectrical detection and detecting transient feeble optical signal, the thesis presents the application system for detecting. On analyzing signal properties, the detecting scheme based on FPGA technology is proposed with the system's core modules designed and their core parts selected. Relational software and hardware is fulfilled and debugged successfully...
A method for threshold selection to detect edge width of objects in the image was presented. Three order spline wavelet was choosed to complete multiscale wavelet edge detection and wavelet edge module values were obtained. After properties of these data was analyzed, a method for threshold selection was proposed using half of maximum of wavelet edge module values. Edge width of objects in the image...
A real-time algorithm is presented to detect moving targets in underwater complex environment. The difference image is obtained by subtraction operation in frames of image sequence. An appropriate threshold is selected and the binary image of the difference image is obtained. Every part of the binary image is segmented into one single image by image segment algorithm. A definition of linear level...
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