Papers by Author: Jie Li

Abstract: The current HDR (High-Dynamic Range) images gets expensive display devices with low dynamic range of equipment problems, research objectives are presented methods for using ordinary camera fetching and displaying high dynamic range images. General three-color camera’s use is to obtain 3 different exposures of the same scene images, and binary image pyramid, followed by low-level image panning and rotation registration step by step, using HDR Darkroom Photomatix software obtains high dynamic range images ,tone mapping and detail enhancement, using Photoshop software to fine-tune to get the final high-dynamic range images. Visual evaluation and instrumental measurements shows the synthesis of high dynamic range images can increase reflects the brightness of the scene, details and colour information, application and promotion of the value of the method.

Abstract: Two dimensional code security system can be used to encrypt the user is decoded product, inspection by anti fake system or mobile phone software, can be genuine security information products. The Fourier transform of the amendment in the two-dimensional code patterns on the basis, transforming it into the function value is input to the server system. After a raster image processor (RIP) to draw the value of Bessel curve fitting, and tend to image in a plurality of sine function description, at the same time using the Visual Basic to draw a sinusoidal function diagram, the output image information two-dimensional code generation. Finally, through the internal matching storage printing output pattern and server security code information, you can verify the authenticity of products. It provides a simple and convenient method, and accurate for the commodity information traceability and product anti-counterfeiting identification.

Abstract: It briefly analyzed the disadvantages of ICC (International Color Consortium) color management technology and color management technology based on iCAM (image Color Appearance Model), and then it put forward the thought of multi-spectral color management technology. It specifically designed the basic framework of the multispectral color management, focused on the basic composition and working principle of spectral color management model. Besides it analyzed the composition and basic principle of spectral color gamut mapping framework. Lastly it pointed out the research direction of multispectral color management.

Abstract: The efficient reconstruction of spectral color information was the key research subject of color production technique based on spectrum. For the reality that the current principal component analysis method and independent component analysis method cannot solve the efficient reconstruction of spectral color information satisfactorily, it put forward the mixed frequency component analysis method in the integrated and unique perspective for the first time. And it solved the efficient reconstruction of spectral color information successfully, besides it provided the further theoretical support of color vision stage theory and a new theoretical explanation of eye color visual constancy

Abstract: Based on four fundamental deficiencies of the current color reproduction theory and technique, it proposed a new theoretical and technical approach of multi-spectral color reproduction technique. And it investigated five key issues of multi-spectral color reproduction technique systematically, namely the establishment and optimization of multi-spectral acquisition system, the fusion of multi-spectral image, the reconstruction of spectral color information, the multi-spectral display and print, the establishment of spectral color management standard. Finally it pointed out the main research directions and application prospects of multi-spectral color reproduction technique.