Image analysis – Image transformation or preprocessing – Measuring image properties
Patent
1998-03-11
2000-09-05
Couso, Yon J.
Image analysis
Image transformation or preprocessing
Measuring image properties
382215, 382278, G06K 936
Patent
active
061155055
ABSTRACT:
There is disclosed an area detection apparatus in which a reference image having a predetermined pattern is prepared beforehand, and an area having the same pattern as the reference image is detected from an inputted search image. A reference image, in which only a pattern is determined, but density values for each area are not determined, is prepared. Respective density mean values for partial areas of the noticed area, each of which correspond to the associated one of partial areas of the reference area, are allocated to the reference area. A correlation operation is performed between the noticed area and the reference image to which the density mean values are allocated. The area detection apparatus is capable of detecting areas with greater accuracy, involving no necessity for an especial hardware or no greatly increasing an amount of operations, even if brightness is varied.
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Hasegawa Fumi
Hashima Masayoshi
Kanda Shinji
Maruyama Tsuguto
Couso Yon J.
Technology Research Association of Medical and Welfare Apparatus
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