Method for improving the quality of an image

Details Method for improving the quality of an image Method for improving the quality of an image

2006-10-31

2006-10-31

Ahmed, Samir (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S260000, C382S274000, C382S275000, C358S003260, C358S003270, C358S463000

Reexamination Certificate

active

07130479

ABSTRACT:
In a method for improving the quality, particularly the signal-to-noise ratio, of an image, first image data are subjected to a mathematical operation in the position domain that improves the image quality, with picture elements in the environment of the individual picture element, for each individual picture element of the image to be subjected to the mathematical operation are provided with mutually independent, first weighting factors that have a magnitude dependent on the spatial distance of the respective picture element of the environment from the individual picture element, and with which the mathematical operation is implemented for the individual picture element. Picture elements in the environment of the individual picture element for each individual picture element of the image are additionally provided with mutually independent, second weighting factors that have a magnitude dependent on intensity differences or color differences of the respective picture element of the environment compared to the individual picture element. The method enables an improvement of the image quality with approximately unaltered sharpness and can be realized as a real-time procedure in medical imaging.

REFERENCES:
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patent: 6091848 (2000-07-01), Yamamoto
patent: 6512841 (2003-01-01), Yamada et al.
patent: 6950211 (2005-09-01), Trifonov et al.
“Image Enhancement,” Lim, from Digital Image Processing Techniques, Ekstrom, Ed., Academic Press, 1984, pp. 11-25 and 33-41.

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