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The mine rescue robot can use the visual system to obtain the information of fire site, and real-time transmit the information and image of site. This paper builds the mobile robot platform, and obtained the fire image using the visual system of this mobile robot. Then an edge detection algorithm of flame image based on wavelet module maxima is proposed. This method is calculating the gradient module...
In this paper, a wavelet-based digital image watermarking algorithm is putforward, advantage of the zero-watermark. In proposed algorithm, the key is generated by XOR operation.This algorithm has very srong robustness, because of the pixel point are hardly changed. At the same time it has very strong invisibility because it dose not modify the data of the original image. Experiments show that a better...
An image classification method based on wavelet transform was brought up, and it adopted the human visual features model and analyzed the image parameter characteristics in smooth and texture regions. It put up optimum carrier image selecting method of original image to be hidden while analyzing the differences between the carrier and being hidden image. On the premise of setting a threshold, it made...
Image unchangeable coefficient rule in discrete cosine and wavelet transformation was proved when it was scrambled in spatial domain. Based on the constructed composite chaotic iterative dynamic system, whose invariant distribution density was one, and in order to initialize for composite chaotic iterative dynamic system, it put forward two construced functions using image scramble constant as input...
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