教師著作

Permanent URI for this collectionhttp://rportal.lib.ntnu.edu.tw/handle/20.500.12235/31268

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Author: search.filters.author.Ming-Chih LuSubject: search.filters.subject.CCD camera

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    A Practical Nighttime Vehicle Distance Alarm System
    (2008-10-15) Ming-Chih Lu; Wei-Yen Wang; Chen-Chien Hsu; Yin Yu Lu; Cheng-Pei Tsai
    This paper presents a practical nighttime vehicle distance measuring method based on a single CCD image. The method combines an image-based distance measuring system. To solve the nighttime feature extraction problem, the proposed method uses two taillights as the feature. Based on the proportionality of similar triangles, distance between a CCD camera and the taillights of the vehicle ahead can be measured. The method focuses on detecting the taillights and differentiating the targeted vehicle from others on the basis of partial image analysis instead of whole image processing. The system is both fast and simple. The accuracy of the proposed method is demonstrated in this paper through experiences.
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    Improvements and Applications of the Image-Based Distance Measuring System
    (2007-01-19) Ming-Chih Lu; Chen-Chien Hsu; Yin Yu Lu
    The paper presents practical improvements on the Image-Based Distance Measuring System, achieving the capability of 3-dimensional measurement of distant objects. The configuration of the proposed measurement is very simple, consisting of only a single CCD camera and two laser projectors formed in parallel. Because of the disposition of the laser projectors and the CCD camera, two laser-projected spots will appear on the same scan line of CCD images. Based on an established relationship between pixel counts and photographing distance, 3-D measurement and area information of distant objects can be obtained by using only one scan line in the image frame.