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To narrow down the semantic gap and increase the retrieval efficiency in image retrieval, relevance feedback (RF) has long been an important approach, where the active support vector machine (SVM) based RFs are widely applied to content-based image retrieval (CBIR). However, the performance of these methods are often poor because the low speed of SVM algorithm in high dimension data. Meanwhile, the...
In this paper we present a novel approach to detecting scene text based on the edge and color features. Firstly, because the character edge feature is not sensitive to the luminance changes, we extract the edge features to locate the candidate text region coarsely. Secondly, according to the text row character will keep similar color, we use the K-means clustering to extract color feature and locate...
Mosaic block is easily occurred in the TV signals, which will cause the degraded video. In this paper, we propose an automatic degraded video detection approach based on support vector machine and template matching to detecting mosaic block in video. We develop a detection algorithm based on a cascade of processing steps as follows. First, we use DWT to remove the vertical high frequency of a frame...
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