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Real-time image acquisition method and system of large-view field visible infrared dual-channel camera

An image acquisition and real-time image technology, which is applied in the scanning details of the TV system, TV system components, image communication, etc., can solve the problem of data out-of-sync bit rate, etc., and achieve the effect of rational use of system resources

Active Publication Date: 2010-10-13
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for synchronously uploading and receiving data of different types of detectors in a multi-channel camera with a large field of view, and to construct a system in which the software and hardware of dual-band image acquisition coexist to solve the problem of large field of view cameras. The problem of high-speed real-time synchronous acquisition and display of two types of detectors with asynchronous data and different code rates

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  • Real-time image acquisition method and system of large-view field visible infrared dual-channel camera
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  • Real-time image acquisition method and system of large-view field visible infrared dual-channel camera

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and the step of concrete implementation, the present invention will be further described:

[0035] combine figure 1 , the infrared detector, TDI-CCD and optical system are built on the experimental turntable, and the infrared detector and TDI-CCD are located at the back end of the optical system. The readout circuits of the two detectors are respectively connected to the same two detector drive boards by shielded wires. The LVDS of the two driver boards lead out a total of 6 sets of digital differential signals, which are input to the LVDS receiving end of the image acquisition board. The PCI connector of the image acquisition board is connected with the built-in PCI7300A acquisition card in the host computer.

[0036] combine figure 2 , the A / D converter in the detector driver board needs to be adjusted, and the dynamic range of the amplifier should be properly adjusted according to the gain of the detector.

[0037] ...

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Abstract

The invention discloses an asynchronous variable transmission code rate image acquisition method and a system thereof of a large-view field TDI-CCD (Time Delayed Integration-Charge Coupled Device) infrared dual-channel camera. In the dual-channel image acquisition method, the variable code rate data of double channels is synchronized by adopting a mode of software and hardware pipelining, and a double-thread and double-buffering mode in software is combined, thereby effective data can be guaranteed to be not lost. The dual-channel image acquisition system comprises infrared detectors, a TDI-CCD, an experimental optical system, a platform, a detector driving plate, an image acquisition plate, a PCI7300A acquisition card and upper computer image acquisition software and solves the problems of asynchronous data in the large-view field camera and high-speed real-time synchronous acquisition and display of two detectors with different code rates from two aspects of hardware and software, wherein the used hardware and software platform can be directly applied to similar dual-channel image data acquisition tasks and also expanded to multi-channel variable code data acquisition tasks.

Description

technical field [0001] The invention relates to photoelectric instrument technology, and specifically refers to a large field of view visible and infrared dual-channel camera image acquisition method and system thereof, which are directly applied to similar dual-channel camera imaging tasks. Background technique [0002] The imaging mechanisms of various detectors are different. For example, infrared detectors use the infrared radiation ability of the target to reflect the temperature difference between the target and the background in the infrared image with different gray levels, while visible light detectors use the target’s ability to detect visible light. The amount of reflection determines the grayscale value of the image. The TDI-CCD applied in the present invention utilizes the principle of non-coherent addition of noise signals and linear addition of useful signals to obtain visible light images in dim light situations. A camera with a large field of view including...

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Application Information

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IPC IPC(8): H04N3/15H04N5/225G01J5/00
Inventor 赵明林长青刘素芳李建林
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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