Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Patent
1995-07-27
1998-05-19
Shalwala, Bipin
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
358521, 358458, 358461, 358532, 382199, 382206, 382173, 382167, G06K 940, G06K 948, G06K 952, G06K 934
Patent
active
057547092
ABSTRACT:
The present invention relates to an image processing apparatus in which gradation correction on each partial region is performed between an image input means and an edge extracting means so that an edge of a region within an image is accurately extracted. An image dividing means 2, which had already learned a relationship between the condition of an image and the necessity of image division so as to judge the condition of the image based on learning results and divide the image appropriately, divides an input image from an image input means 1 into a plurality of image blocks. An image correction information extracting means 3 calculates correction information on each image block. A gradation correction means 4, which had already learned a relationship between correction information and non-linear correction curves to judge correction information based on learning results and perform gradation correction on a target image block using a selected curve, performs gradation correction and enhances an edge which is to be extracted. An image synthesizing means 5 recombines the respective corrected image blocks. An edge extracting means 6 extracts an edge from a synthesized image. An image output means 7 outputs an edge image.
REFERENCES:
patent: 5018218 (1991-05-01), Peregrim et al.
patent: 5206917 (1993-04-01), Ueno et al.
patent: 5216463 (1993-06-01), Morita
patent: 5296919 (1994-03-01), Maruno et al.
patent: 5463697 (1995-10-01), Toda et al.
patent: 5477335 (1995-12-01), Tai
patent: 5495350 (1996-02-01), Shimizu et al.
patent: 5515181 (1996-05-01), Iyoda et al.
Search Report dated Jun. 17, 1996.
Bischof et al., "Voronoi Pyramids and Hopfield Networks", 12th IAPR International Conference on Pattern Recognition, vol. III, pp. 330-333, Oct. 9-Oct. 13, 1994.
Folsom et al., "A Modular Hierarchical Neural Network for Machine Vision", IJCNN International Joint Conference on Neural Networks, vol. 2, pp. 897-902, Jun. 7-Jun. 21, 1990.
Imagawa Taro
Koda Toshiyuki
Maruno Susumu
Moriya Michiyo
Yamamoto Hiroshi
Matsushita Electric - Industrial Co., Ltd.
Shalwala Bipin
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