Research On Objective Quality Evaluation And Coding Algorithm Of Stereo Image

Stereo image can record the real information of the world and provide more natural visual sensation than the traditional plane image, so it has more bright applicable future. At present, the stereo image technology has been applied to many fields successfully, such as scientific research, military, education, industry, medication and so on. It has become one of the hottest issues that the scientists are studying on. This paper on stereo technology has done the theoretical analysis and experimental research from the following aspects:Firstly, to do better research on strereo technology, after analysis of the human visual feature, this paper originally proposes stereo visual model based human visual feature, which is based on the results of the research and experimemnts of stereo visual from the perspective of modern medical science. Then select several parameters that influence the human stereo perceive from the study of the model, which provide as the basis and evidence of the research on the stereo image objective quality assessment and coding.Secondly, to persent an effective and convenient assessment approach, this paper demonstrates the significance of the absolute disparity image to the stereo perceive. Combined with human physical and psychological stereo vision, plane image objective evaluation and absolute disparity image, this paper originally proposes a stereo image objective assessment method. This method evaluates stereo image from both the quality of the image and the stereo perceive. Experiments demonstrate that this method performs satisfactorily on the assessment of the stereo image, and the results of the objective assessment show strong correlation with the results of the subjective one.Thirdly, this paper also proposes a double-perspective stereo image coding algorithm, based on disparity estimate of feature points and triangle mesh mapping. To maintain the disparity of two view-points after coding, this algorithm originally extracts feather points with the absolute disparity image, and experiments indicate the decoded stereo image make a good stereo perceive. When coding from the residual pictures, this algorithm proposes the method that only conducting stereo residual coding in Y vector based on the influence of the psychological stereo perceive, luminance and tint feature of human eyes, the tint feature of the stereo image pair and feature of the triangle mesh mapping etc. Experiments demonstrate the advantage of the algorithm: the compression ratio is large, and the quality and stereo perceive of the stereo image are good. This paper also extends double-view stereo image coding to multi-view coding algorithm and provides the coding strategy. At the same time, this paper proposes a novel method to generate new stereo image view and the experiments manifest that this method can generate quadri-view stereo image from double-view stereo image, which have strong stereo perceive.At last, this paper developes a stereo TV hardware developing experimental platform based DM6446 processor, which provides supported hardware to the stereo image experiment and gives a solution to the utility of stereo TV as well. The platform concludes all the hardware interfaces that stereo TV needed, and can support a maximum output of 60 images with a resolution of 1600×1200(or1920×1080)per second. The output adopts digital DVI interface, and can reach a velocity of 1.65Gbps. The hardware platform integrates Linux operation system, develops all the hardware drive programs, and transplants X windows graphical desktop at the same time.