Image processing apparatus

a technology of image processing apparatus and image, which is applied in the field of image processing apparatus, can solve the problems of insufficient versatility of conventional image processing apparatus, inability to obtain a high-frequency component, and inability to obtain a mixture signal, so as to avoid increased circuit scale

US20070247532A1Inactive Publication Date: 2007-10-25MEGACHIPS
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2007-10-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

An image processing apparatus is provided which offers higher versatility than conventional image processing apparatuses. When an input signal to a spatial filtering block is a monochrome signal that contains Y component only, a selector selects its input terminal and a selector selects its input terminal. Then, a low-pass filter output signal of a programmable spatial filter is inputted to a spatial filter, and a low-pass filter output signal of the spatial filer is inputted to a spatial filter. That is, the programmable spatial filter and the spatial filters are connected in series (in cascade), and the cascade-connected three spatial filters perform filtering operation. In this example, low-pass filters with 5×5 taps are connected in cascade in three stages, which enables low-pass filtering with 13×13 taps.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to image processing apparatuses, and particularly to an image processing apparatus having a plurality of image processing blocks that are capable of real-time processing of an image signal inputted from outside.

[0003] 2. Description of the Background Art

[0004] For an image input apparatus such as a digital still camera, Japanese Patent Application Laid-Open No. 2000-236473 discloses a conventional image processing apparatus including an imaging device, an analog signal processing circuit connected to the imaging device, and a Real-time Processing Unit (RPU) connected to the analog signal processing circuit, where the RPU is capable of processing in a real-time manner an image signal outputted from the analog signal processing circuit.

[0005] However, this conventional image processing apparatus does not offer sufficient versatility in the following points:

[0006] the number of taps of spatial fil...

Examples

Embodiment Construction

[0041]A preferred embodiment of the present invention will now be described in detail referring to the drawings. In the drawings, the same reference characters indicate the same or corresponding components.

[0042]FIG. 1 is a block diagram schematically illustrating the entire configuration of a digital still camera according to a preferred embodiment of the present invention. A CCD 1 is followed by an analog signal processing circuit 2. The analog signal processing circuit 2 is followed by an SPU (Sensor Processing Unit) 3. The SPU 3 is followed by an RPU (Real-time Processing Unit) 4. The RPU 4 is connected to a main bus 5. As well as the RPU 4, a CPU 6, an LCD driver 8, a DMA controller 9, a memory interface 10, and a card controller 12 are also connected to the main bus 5. An LCD 7 is connected to the LCD driver 8, an SDRAM 11 is connected to the memory interface 10, and a memory card 13 is connected to the card controller 12.

[0043]The CCD 1 has a three-color-system color filter f...