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Human faces in surveillance video images usually have low resolution and poor quality. They need to be reconstructed in super-resolution for identification. The traditional subspace-based face super-resolution algorithms are sensitive to light. For solving the problem, this paper proposes a face super-resolution method based on illumination invariant feature. The method firstly extracts the illumination...
Accuracy of the human face contour can help evaluate the facial orientation to retrieve facial features to identifying or verifying a human facial expression. Automatic extraction human face contour algorithm with high accuracy is necessary. In this paper, a novel flowchart of the face contour extraction algorithm was proposed for improving accuracy of face contours. Poisson Gradient Vector Flow (PGVF)...
A rapid algorithm for eye state detection is proposed in this paper. It takes use of gray scale characteristics of the eye and upper eyelid bending direction to distinguish the open and closed eye states. Circle similarity of region is proposed as an index to characterize the eye state. And a simple method based on the relation of curve and the straight line linking the two endpoints of curve is proposed...
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