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Visualization of flow fields with geometric primitives is often challenging due to occlusion that is inevitably introduced by 3D streamlines. In this paper, we present a novel view-dependent algorithm that can minimize occlusion and reveal important flow features for three dimensional flow fields. To analyze regions of higher importance, we utilize Shannon's entropy as a measure of vector complexity...
We present the first commissioning data of our TOF-PET test device featuring MPPC read-out of small size LFS crystals. We discuss the characteristics of the test device and present results from two different multi-channel read-out ASIC chips which offer a high timing performance.
In order to extract all the billiard objects from Snooker videos, an effective algorithm of the billiard segmentation is proposed in this paper. This method is divided into the follow two steps: first, we use an automatic segmentation method of local peak edges to extract the Snooker table, this step is mainly served for the image preprocessing; and then is the detection of video objects. Through...
The CCD pixels nonuniformity may give a greater margin of error to measurement results in the high-precision CCD measurement and servo control system. The paper analyzes the image pixels nonuniformity caused by noises, and establishes the corresponding image model. Adaptive threshold value segmentation algorithm is used for image binarization. An algorithm using two point linear method for pixel nonuniformity...
This paper presents a new error concealment algorithm, which is suitable for the H.264/AVC coding standard and the hardware implementation. This algorithm can be dividing into two major categories. In the spatial domain, we use the reliable neighboring pixel values with edge detection method to conceal all the lost pixels in the block. In the temporal domain, we propose a variable block size error...
In this paper a method is proposed to segment the board in Snooker games automatically. The algorithm involves the following steps: first, separable second derivative of Guassian steerable filters, which are linear combination of basis filters and can implement filtering with variant direction, are used to extract the edges in both horizontal and vertical directions. The input image f(x,y) is convolved...
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