Image noise reduction method based on optimal primary-color...

Details Image noise reduction method based on optimal primary-color... Image noise reduction method based on optimal primary-color...

2011-03-01

2011-03-01

Ometz, David L (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07898582

ABSTRACT:
An image noise reduction method based on an optimal primary-color signal is suitable for a digital camera to reduce noises in a digital image. The image noise reduction method mainly includes the following steps, taking out primary-color signals of a digital image, including taking out high-frequency and low-frequency signals of the optimal primary-color signal and high-frequency and low-frequency signals of the worst primary-color signal by using a high-pass filter and a low-pass filter; next, mixing the high-frequency signal of the optimal primary-color signal with that of the worst primary-color signal, and superposing the mixed signal to the low-frequency signal of the worst primary-color signal, so as to get a digital image signal after noise reduction.

REFERENCES:
patent: 4992876 (1991-02-01), Nishizawa et al.
patent: 5285277 (1994-02-01), Min
patent: 5432869 (1995-07-01), Matsumoto et al.

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