Image analysis – Image transformation or preprocessing – General purpose image processor
Patent
1999-04-26
2000-09-26
Tran, Phuoc
Image analysis
Image transformation or preprocessing
General purpose image processor
382173, 382276, 382282, 382307, 358451, 358453, G06K 936, G06K 954, G06K 956, H04N 1387, H04N 1393
Patent
active
06125214&
ABSTRACT:
An operation of an iris filter is carried out on an original image signal representing an image, and the degree of centralization of gradients of the original image signal with respect to a picture element is thereby calculated, each of picture elements constituting the image being taken as the picture element. An image portion, which is associated with a high degree of centralization, in the image is detected in accordance with the calculated degree of centralization. Image emphasis processing is then selectively carried out on the detected image portion. Alternatively, a morphology operation is carried out on an original image signal Dorg by using a multiply structure element Bi and a scale factor .lambda., and a morphology signal Dmor is thereby obtained. The morphology signal Dmor represents whether each of picture elements constituting the image is or is not the one corresponding to an image portion, at which the original image signal Dorg fluctuates in a spatially narrower range than the multiply structure element Bi. Image emphasis processing is then carried out on the original image signal Dorg and in accordance with the morphology signal Dmor.
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Nakajima Nobuyoshi
Takeo Hideya
Yamada Masahiko
Fuji Photo Film Co. , Ltd.
Mariam Daniel G.
Tran Phuoc
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