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US 8,508,625 B2Granted
Image processing apparatus
AssigneeCanon Kabushiki Kaisha
InventorShinya Hirai
Life of this patent
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Abstract
A processing circuit which generates a plurality of signals of different frequency bands from a signal and which suppresses noise by synthesizing the signals of different frequency bands and a generation circuit which generates a signal in which an aliasing signal is suppressed are provided. A signal of the highest frequency band among the signals of different frequency bands to be synthesized with one another by the processing circuit includes the signal which is generated by the generation circuit and in which generation of aliasing signals is suppressed.
Claims18
An apparatus comprising:
- a generating unit configured to receive an image signal and generate a plurality of image signals in different frequency bands from the image signal;
- a synthesizing unit configured to synthesize the generated plurality of image signals with one another;
- a first signal generating unit configured to receive an image signal including a plurality of color signals including a first color signal and generate a first signal using image signals obtained by compensating for pixels which do not correspond to the first color signal;
- a second signal generating unit configured to receive an image signal including a plurality of color signals including the first color signal and generate a second signal using the plurality of color signals;
- and
- a mixing unit configured to receive an image signal including a plurality of color signals including the first color signal from the generating unit, determine a mixing ratio between the first and second signals based on the saturation of each pixel of the image signal, and generate a third signal by synthesizing the first and second signals with each other using the mixing ratio,
- wherein an image signal, among the plurality of image signals, which has a highest frequency band includes the third signal.
4 more elements
A method comprising:
- receiving an image signal and generating a plurality of image signals in different frequency bands from the image signal;
- synthesizing the generated plurality of image signals with one another;
- receiving a signal including a plurality of color signals including a first color signal;
- generating a first signal using signals obtained by compensating for pixels which do not correspond to the first color signal;
- receiving a signal including a plurality of color signals including the first color signal;
- generating a second signal using the plurality of color signals;
- determining a mixing ratio between the first and second signals based on the saturation of each pixel of the image signal;
- and
- generating a third signal by mixing the first and second signals with each other using the mixing ratio,
- wherein an image signal, among the plurality of image signals, which has a highest frequency band includes the third signal.
7 more elements
Dependencies are inferred from the claim text.