Method for reducing the amount of processing of an iris filter

Details Method for reducing the amount of processing of an iris filter Method for reducing the amount of processing of an iris filter

1996-01-23

1998-07-21

Johns, Andrew W.

Image analysis

Applications

Biomedical applications

382260, G06K 900

Patent

active

057844828

ABSTRACT:
In an iris filter operation method, an image signal representing a radiation image of an object is obtained, and a tumor pattern is detected from the radiation image in accordance with the image signal. In an n'th operation processing of the iris filter, information representing the address of each of the picture elements, which are located along each of radial lines extending radially from a picture element of interest, is stored in an address storing means. A calculation is made to find a relative address of each of the picture elements of interest, which are set for an n+1'th processing and those that follow, with respect to the picture element of interest, which has been set in the n'th processing. The address calculation in each of the n+1'th processing and those that follow is carried out by adding the calculated relative address to the address of each of the picture elements, which address has been stored in the address storing means.

REFERENCES:
patent: 4952807 (1990-08-01), Adachi
patent: 5212637 (1993-05-01), Saxena
patent: 5231679 (1993-07-01), Matsuura et al.
patent: 5267328 (1993-11-01), Gouge
patent: 5448654 (1995-09-01), Katayama et al.
patent: 5481623 (1996-01-01), Hara
patent: 5572565 (1996-11-01), Abdel-Mottaleb
"Detection of Tumor Patterns in DR Images (Iris Filter)" Collected Papers of the Institute of Electronics and Communication Engineers of Japan, D-II, vol. J75-D-II, No. 3, pp. 663-670, Mar. 1992.

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