Method for storing multi-path high-speed short-blanking interval linear array CCD (charge-coupled device) image data

Abstract

A method for storing multi-path high-speed short-blanking interval linear array CCD (charge-coupled device) image data relates to a method for storing CCD camera image data, solving the problem that high-resolution high-speed aeronautical and astronautical remote sensing camera image data are difficult to store. The method comprises the following steps of: storing various paths of image data into an SDRAM (synchronous dynamic random access memory) assay in parallel; and reading out the image data path by path and storing the image data in a hard disc of a host by an acquisition card. The conversion between an input data bit nbit and a storer bit 16bit is performed on the image data; the reading-writing clock frequency of the SDRAM can be reduced to n / 16 of an original value; the method can be applied to the situations that the effective data amounts in all rows are the same and the row frequency can be increased to 16 / n of an original value; in order to reduce power consumption of the system and reduce the problem of electromagnetic compatibility at a high frequency, the lowest working frequency of the SDRAM is set and a specific formula is given; and in order to save the inner resources of an FPGA (field programmable gate array), the smallest depth of an asynchronous FIFO (first-in, first-out) is set according to an application condition.

Description

technical field [0001] The invention relates to a method for storing image data of a CCD camera, in particular to a method for storing image data of a multi-channel high-speed (digital transmission clock exceeding 100 MHz) short blanking period linear array CCD camera. Background technique [0002] In the application of high-resolution aerospace remote sensing, the field of view and resolution indicators of linear array CCD cameras are continuously improved, and the number of CCD output channels, the number of spliced ​​pieces and the single-channel readout rate are also continuously improved, so that after digitization The amount of image data and the data transmission rate increase sharply, and image acquisition and storage are difficult. Existing high-speed image acquisition cards usually do not have multi-channel acquisition functions, and multi-channel image acquisition cards are expensive and easily lead to more system transmission cables and bulky volume. [0003] SD...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a multi-channel high-speed short-blanking period linear array CCD image data storage method to solve the problem of difficult storage of image data of existing high-resolution and high-speed (digital transmission clock exceeding 100MHz) aerospace remote sensing cameras

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