Image processing apparatus and method
AssigneeCanon Kabushiki Kaisha
InventorsShingo Nozawa, Taizo Hori
Life of this patent
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Abstract
There are provided an image processing apparatus and its method, in which a first image signal and a second image signal whose resolution is higher than that of the first image signal is selectively inputted, a low frequency component and a high frequency component are separated from the second image signal, the first image signal or an image signal of the separated low frequency component is encoded, and an image signal of the separated high frequency component is encoded.
Claims14
An image processing apparatus comprising:
- a) input means for selectively inputting a first image signal and a second image signal whose resolution is higher than that of said first image signal;
- b) separating means for separating a low frequency component and a high frequency component from said second image signal input by said input means, wherein said separating means converts an image signal of said low frequency component so that the resolution thereof is equal to that of said first image signal;
- c) first coding means for encoding said first image signal or the image signal of the low frequency component separated by said separating means;
- and
- d) second coding means for encoding an image signal of the high frequency component separated by said separating means.
An image processing method comprising the steps of:
- inputting selectively a first image signal and a second image signal whose resolution is higher than that of said first image signal;
- separating a low frequency component and a high frequency component from said second image signal inputted in said input step, wherein said separating step converts an image signal of said low frequency component so that the resolution thereof is equal to that of said first image signal;
- encoding said first image signal or the image signal of said separated low frequency component;
- and
- encoding an image signal of said separated high frequency component.
An image processing apparatus for separating a low frequency component and a high frequency component from a first image signal, converting a resolution of an image signal of said low frequency component, encoding the converted low frequency compnent, encoding an image signal of said high frequency component, and decoding the image signal of the low frequency component and the image signal of the high frequency component which were independently encoded, comprising:
- (a) first decoding means for decoding said encoded image signal of the low frequency component;
- (b) second decoding means for decoding said encoded image signal of the high frequency component;
- and
- (c) synthesizing means for synthesizing the image signal decoded by said first decoding means and the image signal decoded by said second decoding means.
An image processing method of separating a low frequency component and a high frequency component from a first image signal, converting a resolution of an image signal of said low frequency component, encoding the converted low frequency component, encoding an image signal of said high frequency component, and decoding the image signal of the low frequency component and the image signal of the high frequency component which were independently encoded, comprising the steps of:
- decoding said encoded image signal of the low frequency component;
- decoding said encoded image signal of the high frequency component;
- and
- synthesizing said decoded image signal of the low frequency component and said decoded image signal of the high frequency component.
Dependencies are inferred from the claim text.