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Trajectories extracted by previous methods for human action recognition contain irrelevant changes, and the Orientation-Magnitude descriptors of their shapes lack the robustness to camera motion. To solve these problems, action recognition by tracking salient relative motion points is proposed in this paper. Firstly, motion boundary detector which suppresses the camera constant motion is utilized...
Document images captured by a mobile phone camera often have perspective distortions. In this paper, fast and robust vanishing point detection methods for such perspective documents are presented. Most of previous methods are either slow or unstable. Based on robust detection of text baselines and character tilt orientations, our proposed technology is fast and robust with the following features:...
A new image method of velocity measurement based on the smearing effect is presented. The producing mechanism of the smearing effect is introduced, and the relationship between the trailing smear and the relative movement of the camera and the target is also studied. The kinetic model is built to describe the movement of the camera, target and the image. The pixel size and the scale of the camera,...
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