Customizable hardware-based CIS (contact image sensor) sensing signals acquisition method by using FPGA (Field Programmable Gata Array)

Abstract

The invention relates to a customizable hardware-based CIS (contact image sensor) sensing signals acquisition method by using FPGA (Field Programmable Gata Array). According to the method, the FPGA is adopted as a logic chip for processing signals to generate a CIS working clock reference timing sequence and synchronously collect signals, output signals of the CIS are transmitted into the FPGA after passing through high speed A / D (analog / digital) conversion for filtering and image reconstruction. Based on the actual CIS interface form, hardware configuration file is modified on line, the FPGA hardware I / O (input / output) is customized, so that a single circuit system can be provided with many functions of different circuits to satisfy interface requirements of various types of CISs and facilitate plug and play of various types of CISs, thereby being beneficial to improving the compatibility of a collecting module and reducing the cost of redevelopment of the hardware. Therefore, the method has an application value in the CIS image scanning field.

Description

technical field [0001] The present invention is applicable to the field of image scanning applications. The method uses FPGA to generate the reference clock and synchronous acquisition signals required for CIS sensor signal acquisition. Based on the hardware-based self-defining design method, it is convenient to realize different types of Plug and play for CIS sensors. Background technique [0002] There are many types of image signal acquisition sensors, and the fields of application are very broad. CIS, CCD, COMS, etc. are commonly used as sensors for scanning images. CIS is a kind of linear sensor, which is a photoelectric element used to scan flat images or documents into electronic formats for storage, display, processing or transmission. . The product is light and thin, and because it is easy to assemble, it can be plugged and played, which can save production costs. CIS contact image sensors are widely used in many image transmission systems. [0003] Image signal...

AI Technical Summary

Problems solved by technology

[0003] Image signal acquisition Sensor signal acquisition and processing has been a research hotspot. At present, the information acquisition and processing chips used are mainly single-chip microcomputers. This type of single-chip microcomputer can meet the general image sensor signal acquisition, but it will consume a lot of time and resources of the single-chip microcomputer. At the same time It can only be applied to the acquisition of a single type of signal sensor, it is not compatible, and cannot meet the acquisition requirements of different types of signal sensors

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