In this paper, a new method of video object segmentation and disparity estimation is proposed for stereoscopic videoconference. The object in left view is first extracted by motion detection combined with spatial segm...
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Morphological image processing is well known as an efficient method in image processing and computer vision. With the wide use of color in many areas, the interest on the color perception and processing has been growi...
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H.264 is an advanced video compression standard, absorbing the advantages of the previous standards. In this paper, block-based stereoscopic video coding is studied, and some schemes of using H.264 are discussed. The ...
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Ray space representation is the main approach to realizing free viewpoint television (FTV) of complex scene. Data compression in ray space is one of key technologies in FTV. Up to now, some methods, such as Fujii'...
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ISBN:
(纸本)0780384075
Ray space representation is the main approach to realizing free viewpoint television (FTV) of complex scene. Data compression in ray space is one of key technologies in FTV. Up to now, some methods, such as Fujii's work which are similar to still image coding techniques, were used to reduce redundancy in ray space. In this paper, a new concept of "slice" in ray space is presented to probe into new efficient approaches to data compression in ray space, and the correlations between adjacent slices, called as inter-slice correlations, are analyzed. The analytical results indicate that more efficient methods of data compression in ray space can be obtained based on the inter-slice correlations. Some experiments are implemented, in which the inter-slice correlations are also used to prediction and compensation in data compression in ray space. Experimental results show that the proposed compression method with the inter-slice correlations is quite effective.
Object based stereo video coding is feasible for stereoscopic videoconferencing systems. In this paper, a new algorithm for stereo object segmentation and tracking is proposed for stereoscopic videoconferencing based ...
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Object based stereo video coding is feasible for stereoscopic videoconferencing systems. In this paper, a new algorithm for stereo object segmentation and tracking is proposed for stereoscopic videoconferencing based on temporal-spatial characteristics between frames of left channel and disparity features between the left and right channels. First, the object is extracted from left channel with an improved watershed algorithm and high-order statistics. Then, a contour correspondence algorithm based on two-level disparity estimation is proposed for object extraction from the right channel according to the extracted object in the left channel. Finally, an object tracking algorithm is given for object segmentation in the following frames of stereo video by means of contour matching. Experimental results show that the proposed algorithm can segment and track video object pair in image sequence of stereo videoconferencing efficiently.
In this paper, an algorithm of recognizing cutting line of clothes lab.ls tape is proposed, which applies vertical edge detection and distance filter to remove noise and locate the cutting line in image. The proposed ...
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ISBN:
(纸本)0780375084
In this paper, an algorithm of recognizing cutting line of clothes lab.ls tape is proposed, which applies vertical edge detection and distance filter to remove noise and locate the cutting line in image. The proposed algorithm is able to calculate the parameters of the cutting line accurately, and can be used in automatic system for clothes lab.ls cutting, so that the manufacture efficiency is improved while the operating cost is decreased compared with handiwork.
Recently, ball grid array (BGA) techniques are developed very fast due to its advantages of more I/O ports, small size, and so on. In this paper, a vision-based algorithm for BGA package inspection is proposed to accu...
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ISBN:
(纸本)0780375084
Recently, ball grid array (BGA) techniques are developed very fast due to its advantages of more I/O ports, small size, and so on. In this paper, a vision-based algorithm for BGA package inspection is proposed to accurately estimate center and diameters of solder-balls of BGA package, so that defects of BGA package, such as missing or extra balls, oversize or undersize balls, over-height or under-height balls, and pitch can be detected for ensuring the quality of BGA package.
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