Image processing method and apparatus

Details Image processing method and apparatus Image processing method and apparatus

1997-03-14

1999-08-10

Chang, Jon

Image analysis

Image transformation or preprocessing

General purpose image processor

382132, G06K 956

Patent

active

059371110

ABSTRACT:
A morphology operation, with which an image portion having a contour of a predetermined size is extracted from an original image, is carried out on an original image signal Sorg representing the original image. A specific image signal, which represents a characteristic value with respect to the image portion having the contour, is thereby obtained. A specific image emphasis coefficient in accordance with the level of the specific image signal is calculated. An edge signal, which represents a characteristic value with respect to an image edge portion in the original image, is detected. The specific image emphasis coefficient is adjusted in accordance with the edge signal. A new specific image emphasis coefficient obtained from the adjustment is employed as an emphasis coefficient .beta., and a processed image signal Sproc is calculated with Formula (1):

REFERENCES:
patent: 4315318 (1982-02-01), Kato et al.
patent: 4571635 (1986-02-01), Mahmoodi et al.
patent: 4794531 (1988-12-01), Morishita et al.
patent: 5761334 (1998-06-01), Nakajima et al.
"Extraction of Small Microcalcifications on Mammogram Using Morphological Filter with Multiple Structuring Elements" vol. J75-D-11, No. 7, pp. 1170-1176, 1992.
"Basic Theory of Mathematical Morphology and its Appication to Mammogram Processing", vol. 12, No. 1 Jan. 1994.

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