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Handwritten signature is widely used for human identity authentication in daily life. In order to improve the recognition accuracy and promote the success rate, it is necessary to preprocess the signature image. In this paper, the signature image preprocessing included smooth filtering, image binaryzation, signature area acquisition, and edge thinning. Furthermore, an improved adaptive median filtering...
The medical image is widely used in medicine diagnosis for the science-sound qualitative and quantitative analysis. To achieve a clear image, the technology of the image segmentation is the key point. Therefore, this paper proposes a new image segmentation approach using the proportion of foreground to background method. Based on the traditional grayscale image segmentation and the edge detecting...
Based on the existing IR-UWB indoor-positioning receiving system[1], a novel charge-pump PLL receiving system with AGC is proposed to accurately estimate UWB pulse arrival time, and achieve the goal of accurate indoor ranging and positioning. Pulse rising-edge detection??APulse-broadening circuit is mainly discussed, and some new phenomena are analyzed, which can be used for narrow pulse detection...
A new edge detection method is presented based on the information measure, and the new method is applied to the coronary angiogram. Firstly, the blood vessel path points are found by using the square template, and the quasi-center curve of the vessel segment is obtained by using the minimum gray scale criteria and the smoothing technical. Then the orientation information measure concept of an image...
In order to improve the precision, speed, integration and reliability of the linear CCD system, which was used to detect the sub-pixel edge of picture, a new digital system based on auto focusing was designed. The system captures the image of the tested work piece through a CCD, puts the image data into computer, gathers coordinate of tested edge of work by the method of digital image processing and...
The vehicle license plate (VLP) location is the key technique of the vehicle license plate recognition system. The region of license plate has rich edge information and fixed color feature. The location method fusing gray edge and color feature is more accurate and easier than the method only in gray space or in color space. The experiments on 200 Chinese automobile RGB real color images taken from...
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