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Printing good-sized complicated practical report forms is one puzzle in application system with B/S architecture. In order to solve this problem, performing data exchange using XML to come true printing is explored. Windows Form in the framework of .NET is embedded in FrontPage. By self-programming, XML document is analyzed and client-side printing is controlled. Fundamental technique on implementing...
The captured images in the frog climatic condition are often blurred and will degrade the performance of the video surveillance system. In order to meet the real-time requirements of video image defogging, this paper proposes a fast video image defogging algorithm based on the dark channel prior. Firstly, atmospheric light value is estimated by more reasonable way. Secondly, the tolerance mechanism...
Anti-counterfeiting technology has been widely used in many fields, especially in printing industry for banknotes and security documents. This paper introduces an anti-counterfeiting method with varied screening angle and gives the realization procedure of this method. Firstly, the continuous-tone cover image is halftoned by ordered dithering halftoning method with 0o and 45o screening angle, respectively...
In this paper, a new robust digital image watermarking algorithm is proposed in Directionlet transform domain. Directionlet transform (DT) is able to capture the directional edges and contours superior to many multi-resolution geometric analysis (MGA) tools. At first, sample the original image with the generator matrix; Then, decompose each coset into the subbands with directionlet transform. For...
Post-compression rate-distortion optimization (PCRD-opt) algorithm in JPEG2000 needs to calculate rate-distortion slope of every truncation point, and increases the cost of computation and storage as well. A new algorithm is proposed for JPEG2000 rate control, which truncates the code stream by the number of coding passes and needn't to calculate rate-distortion slope. Compared with the standard post-compression...
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