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A new method to embed the watermarks in the amplitude of the quaternion is proposed this paper. Firstly, ununiformity of each unit quaternion block in host image is calculated to pick up the potential block adaptively. Secondly, frequency matrix of host color image is obtained by using quaternion Fourier transform. After that, the water marks are embedded into the amplitude of AC coefficient. Experimental...
Thresholding a gray-level image into two levels is the first step and also a critical part in most document image analysis systems since any error in this stage will propagate to all later analysis. Various algorithms have been proposed over past years, however, with a complex background, problem remains unsolved. In this paper, we proposed a new document image binary method which is based on the...
At present, the textile image is separated by manpower with low efficiency. In order to deal with this problem, this paper proposes a novel algorithm for textile image separation based on back propagation artificial neural network. The factors that can affect the result of image separation are the RGB values of a pixel itself, the color of its adjacent pixels, and its boundary probability. According...
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