Studies on Fruit Grading-System with Stereo Vision
Date Issued
2006
Date
2006
Author(s)
Lee, Shi-Tin
DOI
zh-TW
Abstract
Abstract
In this thesis a new stereo vision device and an algorithm to estimate depth from the stereo were proposed. The device could obtain omni-directional images of three-dimensional objects, it consists a pair of conic mirrors and a CCD camera. The conic mirrors are configured such that the 360° image of an object is collected and then projected onto the camera. Using this image and with a normal project image the depth of object could be estimated. Experiments were carried out on some regular shape objects i.e. cube, cone and staged cylinder and a fruit sweet sop. The estimated spatial distance errors were 2.5mm, and 8 mm for points on the same horizontal plan and for points at different vertical distance respectively that meant 3% and 10% relative errors for the width and depth of a sweet sop respectively. The device developed could be used for the fruit grading system based on size and shapes.
Subjects
座標轉換
影像處理
影像重建
分級
stereo vision
image process
fruit grading system
Type
thesis
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