Image analysis – Histogram processing – For setting a threshold
Patent
1989-05-15
1991-08-06
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 51, G06K 940
Patent
active
050383884
ABSTRACT:
Method and apparatus for sharpening edges and details of a digital image without amplifying noise in the digital image provide an output image which is the sum of the input image and its adaptively-amplified high frequency components, which adaptively amplified high frequency components are obtained by subtracting a low-pass filtered image from the input image. An adaptive amplification factor for the high frequency components is determined as a function of a variance of the pixel values surrounding a pixel and the noise power of the imaging system.
REFERENCES:
patent: 4072928 (1978-02-01), Wilder
patent: 4334244 (1982-06-01), Chan et al.
patent: 4517607 (1985-05-01), Ohkouchi et al.
patent: 4532548 (1985-07-01), Zwirn
patent: 4633504 (1986-12-01), Wihl
patent: 4683496 (1987-07-01), Tom
patent: 4783840 (1988-11-01), Song
patent: 4941190 (1990-07-01), Joyce
patent: 4945502 (1990-07-01), Kwon et al.
"Digital Image Enhancement and Noise Filtering by Use of Local Statistics", by Jong-Sen Lee, IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. PAMI-2, No. 2, Mar. 1980, pp. 440-443.
Couso Jose L.
Moore David K.
Polaroid Corporation
Roman Edward S.
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