Method and system for real time synthesizing multi-tap CCD output image data

Abstract

The invention relates to a multi-tap CCD output image data real-time synthetic method and a system. The method comprises the following steps: 1) pixel data output by CCD taps is collected to be written into a dual-port RAM; 2) a writing address generator is established, and the pixel data of the dual-port RAM is written into the corresponding address; 3) a reading address generator is established, all the writing addresses of the dual-port RAM and a chip select signal are subjected to the uniform addressing by the reading address generator; 4) the address of the dual-port RAM and the chip selection signal after the addressing are taken as a read address of the dual-port RAM; 5) all the corresponding read data lines of the dual-port RAM are connected together, the pixel data is sequentially read from the read address according to the addressing sequence and the required image data is synthesized. The invention provides the multi-tap CCD output image data real-time synthetic method and the system with low cost and simple realization process for solving the technical problems in the background technology.

Description

technical field [0001] The invention relates to a method and system for synthesizing image data, in particular to a method and system for synthesizing real-time image data output by a multi-tap CCD. Background technique [0002] For high-speed frame-transfer CCD sensors, because the exposure period is very short, to output image signals in a very short time, it is necessary to increase the frame transfer rate and pixel clock, which brings great challenges to the chip manufacturing process and the design of peripheral drive circuits. difficult, and the signal-to-noise ratio will deteriorate. In order to alleviate this situation, chip manufacturers have adopted a multi-head output design, which divides the photosensitive area and storage area of ​​the CCD into multiple blocks, each with its own output port, and multi-port parallel output. In this way, the frame transfer rate and output pixel clock are greatly reduced. However, it is still necessary to synthesize multiple sig...

AI Technical Summary

Problems solved by technology

When resynthesizing images, external devices must participate in the processing, such as CPU, so this synthesis method has the following disadvantages: data must be first in first out, cannot be accessed randomly, and cannot be disturbed and adjusted, and the system structure and data processing process are complicated and costly. high

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