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Generating region outlines from grayscale images using contour generation algorithms is one of the basic methods for image segmentation. The results can be used in 3D reconstruction from contours. The algorithm proposed in this paper which uses templates can effectively deal with the cases when contours pass through grid points and reach image boundaries.
This paper presents an image mosaic technique using ORB (oriented FAST and rotated BRIEF) descriptor and an improved blending algorithm. Features of images with overlapping regions are first described by ORB descriptors. This binary descriptor outperforms SIFT and SURF in regard of processing speed. RANSAC algorithm is then applied to reject mismatches. Once the best projective deformation matrix...
Image super-resolution reconstruction can use single or multiple complementary low-resolution images to reconstruct a high-resolution image. The most widely used spatial domain algorithm can combine complex motion model with corresponding interpolation, filtering resampling and iteration to reconstruct a much more better image. Two typical super-resolution reconstruction algorithms in spatial domain...
Caption texts in news video highly summarize the related news story and can be used for effective retrieval. This paper presents an effective caption location method based on edge detection and an improved caption segmentation method combined with Otsu and K-means clustering algorithm. Experiment results show that the caption location method performs well in the news video and the caption segmentation...
The unsharp masking filter is an efficient and effective algorithm frequently applied in image contrast enhancement applications. The principle is based on sharpening object edges by appending a scaled high-pass version of the image to the original. The quality of the processed image is largely dependent on the characteristics of the high-pass signal and the scaling factor. Thus, optimal choices of...
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