Image processor and image processing method

Abstract

Provided is an image processing technique compatible with both a CCD and a CIS, which controls storage of image data read by each device in a memory and the read of the stored data for each rectangular area to obtain a high memory efficiency, an image processing apparatus includes an input section which executes input processing of image data read by an image reading device in accordance with the data output format of the device, an output data control section which distributes the image data that has undergone the input processing by the input section in accordance with the output format of the image reading device, an address generation section which generates address information corresponding to the output format to store the distributed image data in a memory, and a memory control section which DMA-transfers the distributed image data to the memory and stores the image data on the basis of the generated address information.

Description

technical field [0001] The present invention relates to a method for controlling storage of image data read by each device into a memory and the storage in units of rectangular areas, which can be adapted to both image reading devices (charge-coupled device (CCD) and contact image sensor (CIS)). Image processing technology for reading out image data. Background technique [0002] FIG. 27 is a block diagram showing the configuration of a scanning image processing circuit in a conventional image processing device. As an image reading device, an optical element such as CCD2010 or CIS2110 is used, and the data in the predetermined output form is respectively controlled by the CCD interface (I / F) circuit 2000 and the CIS interface (I / F) circuit in line units in the main scanning direction. 2100 performs A / D conversion and stores it in the main memory 2200 . In this case, the CCD2010 outputs the data corresponding to R, G, and B in parallel. On the contrary, the signal output fr...

AI Technical Summary

Problems solved by technology

[0004] However, in a circuit configuration in which dedicated line buffers 2400a-d are provided for each processing unit, the maximum number of pixels in the main scanning direction that can be processed depends on the storage capacity of the dedicated line buffers provided for each processing unit, which is a limitation. Major Factors in Processing Throughput

[0005] In addition, in order to improve the processing capability, in the hardware structure of the image processing circuit, the increase in the capacity of the line buffer will increase the cost burden, which becomes a major factor affecting the overall cost reduction of the image processing device.

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