Image and Video Analysis

A Genetic Algorithm for Efficient Video Content Representation

Computational Intelligence in Systems and Control, Kluwer Academic Publishers, 1999.

The first stage of the proposed algorithm includes a scene cut detection mechanism. Then, video processing and image analysis techniques are applied to each video frame for extracting color, motion and texture information. Color information is extracted by applying a hierarchical color segmentation algorithm to each video frame. Consequently, apart from the color histogram of each frame additional features are collected concerning the number of color segments, and their location, size and shape. Motion information is also extracted in a similar way by using a motion estimation and segmentation algorithm. All the above features are gathered in order to form a multidimensional feature vector for each video frame. The representation of each frame by a feature vector, apart from reducing storage requirements, transforms the image domain to another domain, more efficient for key frame selection. Since similar frames can be characterized by different color or motion segments, due to imperfections of the segmentation algorithms, a fuzzy representation of feature vectors is adopted in order to provide more robust searching capabilities. In particular, we classify color as well as motion and texture segments into pre-determined classes forming a multidimensional histogram and a degree of membership is allocated to each category so that the possibility of erroneous comparisons is eliminated.

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