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Image processor and image processing method

An image processor and image processing technology, applied in image communication, instruments, static indicators, etc., can solve problems such as system performance degradation and inability to use the system bus

Inactive Publication Date: 2008-01-02
FUJITSU MICROELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the system bus is used for image overlay processing, other modules such as the CPU cannot use the system bus
This degrades system performance

Method used

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Embodiment Construction

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0032] Fig. 1 shows a first embodiment of the invention. This example illustrates the basic principle of the invention. The image processor has an image processing circuit IMGPC. The image processing circuit IMGPC has a line memory LM, an image processing part IMGPU, and an image superimposition circuit IMGSPC. The image processor is installed in, for example, a digital camera. In a digital camera in which an image processor is installed, an image output unit IMGOU that supplies image data to an image processing circuit IMGPC corresponds to, for example, a unit having an image sensor of the camera and an AD converter.

[0033] The line memory LM is connected to the image processing section IMGPU and the image superposition circuit IMGSPC. The line memory LM has a source image area SAREA and a decoration image area DAREA allocated to it. The source imag...

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Abstract

A line memory has a source image area and a decoration image area allocated thereto. The source image area sequentially retains partial source image data corresponding to at least one line of a screenful of a source image. The decoration image area retains decoration image data corresponding to a decoration image for decoration of the source image. An image superimposing circuit repeatedly performs superimposing processing to superimpose the partial source image data retained in the line memory with partial decoration image data corresponding to the partial source image data, until a screenful of the source image is superimposed. Thus, the source image data and the decoration image data can be superimposed without use of a system bus. This can prevent increase in system bus utilization.

Description

technical field [0001] The present invention relates to an image processor and an image processing method for superimposing an input image from a camera or the like with a decoration image for decorating the input image. Background technique [0002] Typically, such image processors store input source images from cameras or the like in system memory. Decoration images used to decorate source images are pre-stored in system memory. Then, the source image held in system memory is overwritten with the decoration image so that the source image is superimposed with the decoration image. The overlay image is read from system memory, eg, by a display controller for the display. The system memory is connected to a plurality of modules including a CPU controlling the system, a display controller, and the like via a system bus. [0003] In addition, there is another image processor having a line memory whose capacity can accommodate image data of at least one line of a superimposed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/377
CPCH04N1/3871
Inventor 山田淳打田淳
Owner FUJITSU MICROELECTRONICS LTD