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Thermal infrared imager inhomogeneous correction coefficient generation and control method

A non-uniform correction and infrared thermal imaging camera technology, applied in the field of infrared thermal imaging, can solve the problems of slow flash reading and writing speed, slow loading and downloading process, etc., to avoid frequent pauses in the picture, reduce flash storage capacity, and improve circuit The effect of operating efficiency

Active Publication Date: 2013-04-10
WUXI ALEADER INTELLIGENT TECH
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AI Technical Summary

Problems solved by technology

At the same time, due to the slow reading and writing speed of flash, the loading and downloading process of coefficients is also very slow

Method used

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  • Thermal infrared imager inhomogeneous correction coefficient generation and control method
  • Thermal infrared imager inhomogeneous correction coefficient generation and control method
  • Thermal infrared imager inhomogeneous correction coefficient generation and control method

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Embodiment Construction

[0033] Below according to the attached figure 1 Illustrate the realization process of the present invention:

[0034] 1. Step 100 is to start the preparation phase.

[0035] 2. Step 101 is the data collection stage. The black body provides high and low temperature scenes respectively, and the responses of each pixel of the detector are converted into digital signals by ADC and collected to the host computer.

[0036] 3. Step 102 obtains the gain coefficient G of the two-point method through calculation. G is a 15-bit unsigned number, and the obtained gain coefficient generally does not exceed the range of 20%. At the same time, step 102 downloads the gain coefficient G to the parallel flash through the serial port. The baud rate is selected as 115200. The writing speed of the selected parallel flash is faster than that of the serial port, so the gain can be directly written into the flash without buffering.

[0037] 4. Step 200 is the start-up phase of the thermal imager.

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Abstract

The invention discloses a thermal infrared imager inhomogeneous correction coefficient generation and control method. The thermal infrared imager inhomogeneous correction coefficient generation and control method comprises that 1.infrared focal plane response data when infrared focal plane is respectively in high temperature and in low temperature are collected. 2. A gain factor G of a two point correction method is calculated through an upper computer and the gain factor G is downloaded into a parallel flash. 3. A startup loads gain factor G into a static random access memory (SRAM) from the flash. 4. A deviation ratio O is received through one time one point correction coefficient motion. 5. An offset compensation correction coefficient generation is controlled by analyzing a detector work temperature. 6. Steps are that two points plus one point inhomogeneous correction is proceed and correction results are output and the like. The thermal infrared imager inhomogeneous correction coefficient generation and control method removes calculation and storage process of the two-point method coefficient and reduces a half of the flash memory capacity. The load process and the download process of the inhomogeneous coefficient are shortened. The thermal infrared imager inhomogeneous correction coefficient generation and control method quicken a read-write speed of the flash by utilizing the flash design. The efficiency of the circuit is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of infrared thermal imaging, and in particular relates to a method for generating and controlling a non-uniform correction coefficient of an infrared thermal imaging camera. Background technique [0002] The development of infrared focal plane array detector and its infrared image post-processing technology has made infrared thermal imaging cameras more and more used in military, industrial and civilian applications. However, since the infrared thermal imaging detector still has the non-uniform thermal response of the detection unit, the non-uniform correction technology for the detection unit cannot be separated in the infrared thermal imaging camera. [0003] Since the installation of two cold and hot black bodies with different temperatures in the infrared thermal imaging device increases the complexity of the system design and greatly increases the energy consumption of the device, the current commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/52
Inventor 刘燕梅平韦良忠陈黎明蒋俊
Owner WUXI ALEADER INTELLIGENT TECH
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