碩士 / 明志科技大學 / 電子工程研究所 / 100 / A lot of AOI literature to discuss the image grabbing technology of the regular CCD camera and the developed method of the correction parameters, to achieve more precision applications of vision metrology. These methods of the fisheye images can’t get good results by scholars follow, because the fisheye images refers the image center for the flat surface of tangent ray tracing to produce more serious barrel distortion and the color has intense recession. However, there has large depth of field and much wider fields of view.
The cone of shape approximate cylindrical is a common component, general testing of its internal and external surfaces is hot and waiting for a breakthrough topic in the current. Image cup’s internal and image of quality for the cup example in this paper. C.J. Chang put forward the nature of the fisheye projection model as a benchmark of calibration methodology has a wide range of fisheye images is effect and measurement techniques, but the image are not discussed optical properties of edge for determining the characteristics of location. We construct a system for image grab and evaluation of cup’s internal. The axis is overlapping cup and fisheye camera use the symmetry image, this fundamental step to build panoramic view of the measurement system to cup’s internal can be analyzed.
We arrange equidistant and size of the special image in a different position within the cup, it make an assessment of image quality in the cup; The Modulation Transfer Function is attained for image of edge. Because fisheye image has serious distortion of brightness and shape, iso12233 put forward the method get Line Spread Function for image of five degree edge can’t objective analysis MTF of fisheye image. Based on this, the paper put forward method to deal with fisheye image have brightness distortion, first, normalize the intensity of overall image, then Cartesian coordinate conversion polar coordinate refer to the distortion center get edge of LSF can to analyze fisheye image of MTF.
| Identifer | oai:union.ndltd.org:TW/099MIT00428020 |
| Date | January 2012 |
| Creators | Cheng, Chang-Min, 鄭章民 |
| Contributors | Chang,Chuang-Jan, Hwang,Shu-Lin, 張創然, 黃樹林 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 79 |
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