Browsing by Author "Chu, C"

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Asymmetric 2+1 pass stereo matching algorithm for real images
(2006-05-01)
Chu, C
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Chang, CC
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資訊工程學系
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Department of Computer Science
An asymmetric 2+1 pass stereo matching algorithm is proposed for generating a depth map from the input of two real stereo images. In the first pass, the Canny edge detector is used to acquire edge images from the inputs. Component images are then generated from the edge images. The edges of each component in the left component image are cut to obtain asymmetric left and right component images. The concept of a disparity-space image (DSI) by components is introduced and dynamic programming (DP) techniques are applied to match the asymmetric left and right component images. In the second pass, the previous DSI is modified, applying the DP methods to acquire the matched pixel pairs of the matched component pairs, and to generate ground control pairs (GCPs). In the final pass, these GCPs are incorporated into the DP algorithms to determine the optimal path and acquire the depth image. The results show that the proposed approach produces reliable and efficient matching and preserves the shapes of objects effectively for real stereo images. The proposed algorithm makes contours clearer than other conventional methods for real stereo images. (C) 2006 Society of Photo-Optical Instrumentation Engineers.
Laboratory evaluation of NH3 injection technology to reduce HCl emissions from incinerators
(1997-04-01)
Bai, H
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Chu, C
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交大名義發表
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環境工程研究所
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National Chiao Tung University
A laboratory-scale experimental study is conducted to investigate the fundamental properties of NH3-HCl reaction in a simulated incinerator duct system. The NH3 injection technology is a dry HCl removal process which produces solid products. The test results showed that under typical incineration operation conditions, the outlet concentration of HCl can meet the emission standards for incinerators in Taiwan. An excessive injection of NH3 above stoichiometric requirement may not lead to the NH3 slip problem. This is because that the excessive amount of NH3 would probably diffuse onto the product particles. However, the enhancement of NH3 utilization is economically not feasible. The outlet concentrations of HCl and NH3 are almost independent of their inlet concentrations for residence time longer than I second. Moisture content and the NH3/HCl injection ratio are two of the most important factors which affect the HCl removal and NH3 utilization.