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TDI-CCD (time-delayed-integration charge coupled device) camera real-time image motion digital compensation system and compensation method

A technology of TDI-CCD and image motion compensation, which is applied in parts of TV system, image communication, TV, etc.

Inactive Publication Date: 2011-08-17
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0008] As a result, each line of image has an image shift

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  • TDI-CCD (time-delayed-integration charge coupled device) camera real-time image motion digital compensation system and compensation method
  • TDI-CCD (time-delayed-integration charge coupled device) camera real-time image motion digital compensation system and compensation method
  • TDI-CCD (time-delayed-integration charge coupled device) camera real-time image motion digital compensation system and compensation method

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Embodiment Construction

[0034] In the present invention, a 4096x 16-level TDI-CCD is used for real-time acquisition and image motion compensation experiments. Used in the experiment: the control of the optical-mechanical system adopts the console of Zolix Company, which drives the TDI-CCD detector and the push-broom optical system; the digital hardware pipeline structure of data acquisition and image motion compensation adopts Verilog HDL in Xilinx Company Spartan3XC3S1500 series FPGA Hardware implementation; the TDI-CCD image motion compensation and acquisition control software of the upper computer is written by Visual C++6.0, and the control parameters are sent and the image data is collected and received in time-sharing through the 68013A interface chip of Cypress Company.

[0035] The preparation of the platform before the experiment is as follows: place the TDI-CCD line array vertically on the turntable supported by the mechanical mechanism. The direction of turntable rotation is opposite to the...

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Abstract

The invention discloses a TDI-CCD (time-delayed-integration charge coupled device) camera real-time image motion digital compensation system and a compensation method. The image motion digital compensation method disclosed by the invention takes full advantage of a prerequisite condition of the ratio of push-broom speed to TDI-CCD charge transfer speed, and an IIR filter form of image motion compensation is inverted and deduced from a mechanism generated from the image motion at an integral direction; the real-time system of digital image motion compensation in a collecting process is realized by adopting a stream line mode and combining a hardware structure of the IIR filter; regarding that a digital image motion compensation module in a hardware comprises add and subtract operation, in the operation process, signed number of expansion digits is adopted to prevent data overflow and improve operation accuracy. The compensation system is composed of the TDI-CCD, an optical mechanical system, a detector driving and collecting plate, a USB (universal serial bus) interface device and an upper computer image motion compensation control and collecting software, comparing through the images compensation before and after, the real-time compensation of the image motion at the integral direction can be realized through the method and the system.

Description

technical field [0001] The invention relates to a camera image motion digital compensation system and compensation method, in particular to a TDI-CCD camera real-time image motion digital compensation system and compensation method. Background technique [0002] TDI-CCD is one of the core detectors currently used in low-light scenarios. Compared with ordinary linear CCD, TDI-CCD utilizes time-delay integration technology to arrange level-level detection pixels in the scanning direction to form level-TDI-CCD. The signal charges collected in the first exposure integration period are not output directly, but are accumulated with the signal charges of other stages in the vertical direction, and are serially output from the last stage. The output amplitude of the accumulated N-level correlated signal is N times that of the single-level, and the noise of each level is uncorrelated and superimposed to be the single-level times, thereby increasing the signal-to-noise ratio to tha...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N7/26
Inventor 赵明林长青潘胜达李建林
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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