| 摘要 |
Acquired video signals are forwarded to pre-processing block ( 103 ) for sampling, gain amplification and A/D conversion, and then forwarded to image buffer ( 104 ). Video signals in image buffer ( 104 ) are forwarded to noise estimation block ( 106 ). On the basis of taking conditions, video signals and a reference noise model, noise estimation block ( 106 ) works out the quantity of noise per ISO sensitivity, and per color signal. The calculated noise quantity is forwarded to noise reduction block ( 105 ). On the basis of the noise quantity estimated at the noise estimation block ( 106 ), the noise reduction block ( 105 ) applies noise reduction processing to video signals in image buffer ( 104 ), and video signals after noise reduction processing are forwarded to signal processing block ( 108 ).
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