An imaging system and method with controllable dark level index
An imaging system and dark level technology, applied in parts of TV systems, parts of color TVs, TVs, etc., can solve problems such as limitations of dark level adjustment, achieve low cost, strong versatility, and simple implementation Effect
Inactive Publication Date: 2015-09-02
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0007] In order to solve the technical problem that the dark level adjustment in the existing imaging system has limitations, the present invention proposes a general imaging system and method with controllable dark level index in view of the above situation
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[0047] The present invention is described in detail below in conjunction with accompanying drawing
[0048] The schematic diagram of the principle of the present invention is as figure 1 , an imaging system with a controllable dark level index, including a photoelectric imaging sensor, an operational amplifier, an image signal processing chip (with functions of clamping and sample-and-hold (S / H) for input signals), a switch control circuit 13, an analog switch, reference level compensation network, the analog image signal output by the photoelectric imaging sensor is output to the operational amplifier, and the reference level compensation network constitutes an addition and subtraction circuit, the addition and subtraction are enabled by analog switches, and the output of the operational amplifier is connected to the image The input of the signal processing chip is AC-coupled, and the digital image signal output by the image signal processing chip is transmitted to the real-t...
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The invention relates to a black level index controllable imaging system and method. The system comprises a black level test environment, a real-time image acquisition and display system and a photoelectric imaging sensor, an operational amplifier, an image signal processing chip, a switch control circuit, an analog switch and a reference level compensation network, wherein the output end of the photoelectric imaging sensor is connected with the input end of the operational amplifier; the output end of the operational amplifier is connected with the input end of the image signal processing chip through a capacitor; the output end of the image signal processing chip is connected with the input end of the real-time image acquisition and display system; the reference level compensation network is connected with the input end of the operational amplifier through the analog switch; and the switch control circuit controls the switching-on and switching-off of the analog switch according to the sequential relationship between a dummy pixel section and a valid pixel section of an analog image signal output by the photoelectric imaging sensor. The invention solves the technical problem that the existing imaging system has black level regulation limitations. According to the invention, the black level index is bidirectionally controllable.
Description
technical field [0001] The invention relates to an imaging system and method, in particular to an imaging system and method with controllable dark level index. Background technique [0002] Image sensors are optoelectronic components in the optoelectronic industry, mainly divided into CCD chips (Charge Coupled Device), CMOS chips (Complementary Metal-Oxide-semiconductor Transistor) and CIS chips (Contact Image Sensor). [0003] The imaging system is mainly composed of optomechanical components, image sensor, driving circuit and signal processing circuit. The target is imaged on the photosensitive surface of the image sensor through optomechanical components. Under the action of the drive circuit, the image sensor completes the process of conversion, storage, transfer and reading of photoelectric charges, thereby converting optical information into analog image electrical signals, signal processing The circuit converts the analog image electrical signal into a digital image ...
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IPC IPC(8): H04N5/232H04N5/361
Inventor 许哲张健李爱玲单金玲
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI