发明名称 |
Method And Apparatus For Context-Based Video Quality Assessment |
摘要 |
Spatial distortion (i.e., when a frame is viewed independently of other frames in a video sequence) may be quite different from temporal distortion (i.e., when frames are viewed continuously). To estimate temporal distortion, a sliding window approach is used. Specifically, multiple sliding windows around a current frame are considered. Within each sliding window, a large distortion density is calculated and a sliding window with the highest large distortion density is selected. A distance between the current frame and the closest frame with large distortion in the selected window is calculated. Subsequently, the temporal distortion is estimated as a function of the highest large distortion ratio, the spatial distortion for the current frame, and the distance. In another embodiment, a median of spatial distortion values is calculated for each sliding window and the maximum of median spatial distortion values is used to estimate the temporal distortion. |
申请公布号 |
US2015373324(A1) |
申请公布日期 |
2015.12.24 |
申请号 |
US201314763940 |
申请日期 |
2013.06.09 |
申请人 |
LIAO Ning;CHEN Zhibo;ZHANG Fan;THOMSON LICENSING |
发明人 |
Liao Ning;Chen Zhibo;Zhang Fan |
分类号 |
H04N17/00;H04N19/114;G06T7/00;G06K9/03;G06K9/00;H04N19/103;H04N19/154 |
主分类号 |
H04N17/00 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for estimating visual quality of a video sequence, comprising:
accessing spatial distortion for frames in a plurality of sliding windows that include a current frame in the video sequence; determining a factor indicating at least one of a large distortion density and a representative artifact level for each sliding window responsive to respective spatial distortion for frames in the each sliding window; determining temporal distortion for the current frame responsive to the determined factor; and determining the visual quality of the video sequence responsive to the temporal distortion of the current frame. |
地址 |
Beijing CN |