Thomson Licensing

Daimler Ag

Huazhong University of Science and Technology

Diamler Ag

Interdigital Ce Patent Holdings

Fan Zhang

Zhibo Chen

Ning Liao

Hai Jin

Zhi Chen

Xiao Dong Gu

Kai Xie

Xiaofei Liao

Long Zheng

Zhiyuan Shao

Wen Fei Jiang

A graph processing optimization method that addresses the problems such as the low computation-to-communication ratio in graph environments, and high communication overhead as well as load imbalance in heterogeneous environments for graph processing. The method reduces communication overhead between accelerators by optimizing graph partitioning so as to improve system scalability.

Graph processing optimization method based on multi-FPGA accelerator interconnection

In video quality control and estimation, the joint evaluation of compression artifacts and channel artifacts is a problem. The invention considers the joint perception of both a compression artifact level D(V) and a channel artifact level D(V) in a method for calculating overall distortion in a video being affected by compression artifacts and channel artifacts. The method comprises a step of adding a compression artifact level D(V) and a summand S that is derived from log (D(V)) multiplied with a factor that decreases with increasing compression artifact level D, such as D(V)=D(V)+c&#xb7;(K&#x2212;D(V))&#xb7;log(D(V)). The result obtained is a measure for the overall distortion.

Method and device for calculating distortion of a video being affected by compression artifacts and channel artifacts

Accuracy and efficiency of video quality measurement are major problems to be solved. According to the invention, a method for accurately predicting video quality uses a rational function of the quantization parameter QP, which is corrected by a correction function that depends on content unpredictability CU. Exemplarily, the correction function is a power function of the CU. Both QP and CU can be computed from the video elementary stream, without full decoding the video. This ensures high efficiency.

Method and apparatus for video quality measurement

Because neighboring frames may affect how a current frame is perceived, we examine different neighborhoods of the current frame and select a neighborhood that impacts the perceived temporal distortion (i.e., when frames are viewed continuously) of the current frame most significantly. Based on spatial distortion (i.e., when a frame is viewed independently of other frames in a video sequence) of frames in the selected neighborhood, we can estimate initial temporal distortion. To refine the initial temporal distortion, we also consider the distribution of distortion in the selected neighborhood, for example, the distance between the current frame and a closest frame with large distortion, or whether distortion occurs in consecutive frames.

Method and apparatus for context-based video quality assessment

Wheel or wheel cover

A method and an apparatus for image filtering are described. Structural information is employed during the calculation of filtering coefficients. The structural information is described by the regions defined through an edge map of the image. In one embodiment, the region correlation between the target pixel and a contributing pixel is selected as a structural filtering coefficient. The region correlation, which indicates the possibility of two pixels being in the same regions, is calculated by evaluating the strongest edge cut by a path between the target pixel and a contributing pixel. The structural filtering coefficient is further combined with spatial information and intensity information to form a spatial-intensity-region (SIR) filter. The structural information based filter is applicable to applications such as denoising, tone mapping, and exposure fusion.

Image filtering based on structural information

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Hubei, China

Fan Zhang