JaLCDOI 10.18926/19615
FullText URL Mem_Fac_Eng_OU_33_1_47.pdf
Author Jindai, Mitsuru| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yosiomi|
Abstract In this paper, we propose the recognition methods by image processing using 2D or 3D CAD. In the case of 2D CAD, an object is recognized by comparing five characters calculated from the center of gravity and contour. In the case of 3D CAD, there are two recognition methods. Firstly 3D CAD figure is transformed into 2D CAD figures. And an object is recognized by comparing 2D CAD figures with inputted images. Secondly the three dimensional coordinates of vertexes on an object are calculated from the images taken from some cameras and compared 3D coordinates with those of 3D CAD figures and recognized the sort of an object.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1998-11-30
Volume volume33
Issue issue1
Start Page 47
End Page 52
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002309202
JaLCDOI 10.18926/15297
FullText URL Mem_Fac_Eng_OU_33_2_97.pdf
Author Jindai, Mitsuru| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yoshiomi| Tano Masakazu| Okamoto Katsuyuki| Nishino Akira| Okamoto Asao| Nishimori Naoki|
Abstract We propose the recognition method of bridge soldering base metal on the circuits by comparing CAD figure and input image of image processing to locate the soldering iron tip accurately to secure the high quality Firstly, three dimensional CAD assembly drawing of circuits which are assembled perpendicularly in each other is projected on an imaginary two dimensional screen which is vertical to the optical axis of the camera The projected image is used as the standard CAD figure to inspect the location of the bridge soldering base metal. The positions among the bridge soldering base metals show the line state. So this line (connecting line) is used as the reference line to inspect the location of the bridge soldering base metal. The characteristics of the standard figure are represented by the connecting line, edge line and center points of base metal. Secondly, the position and gradient of connecting line among bridge soldering base metals in the input image is estimated. And the position of base metal and assembly accuracy of circuit units are calculated by comparing the shape and position of each base metal with its standard figure based on the connecting line Furthermore, the length between the opposite edges of the base metals are calculated to inspect the positions and the assemble accuracy of circuit units.
Publication Title Memoirs of the Faculty of Engineering, Okayama University
Published Date 1999-04-27
Volume volume33
Issue issue2
Start Page 97
End Page 103
ISSN 0475-0071
language 英語
File Version publisher
NAID 120002307283