Image analysis – Pattern recognition – Feature extraction
Patent
1993-12-28
1996-10-22
Couso, Yon J.
Image analysis
Pattern recognition
Feature extraction
382113, 382282, G06K 948
Patent
active
055685668
ABSTRACT:
A drawing processing apparatus for extracting figures from a drawing as numerical data, comprises a drawing input section for inputting a background drawing and a to-be-processed drawing having a figure on the background drawing, and outputting the drawings as image data, an image storing section for storing the image data corresponding to the background drawing and the to-be-processed drawing input by the drawing input section, a registration section for registering the background drawing and the to-be-processed drawing with each other using the image data read out from the image storing section, a vector forming section for dividing figures on the registered background drawing and to-be-processed drawing into a plurality of segments, and converting the segments into segment data of numerical values, thereby representing the segments as vectors, and a selecting section for selecting vectors, which correspond to the vectors formed from the figure on the background drawing, from among the vectors formed from the figure on the to-be-processed drawing.
REFERENCES:
patent: 3942169 (1976-03-01), Fujimoto et al.
patent: 4718103 (1988-01-01), Shojima et al.
patent: 4748678 (1988-05-01), Takeda et al.
patent: 4817172 (1989-03-01), Cho
patent: 5007098 (1991-04-01), Kumagai
patent: 5140650 (1992-08-01), Casey et al.
"Computer Vision", Chapter 3, 3.2.3 Background Subtraction pp. 72-73; Dana H. Ballard, Christopher M. Brown; 1982.
"Digital Picture Processing", Chapter 9, 9.2 Registration pp. 23-31; Azriel Rosenfeld, Avinash C. Kak; 1982.
Asano Mieko
Hori Osamu
Shimotsuji Shigeyoshi
Couso Yon J.
Kabushiki Kaisha Toshiba
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