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An industrial color camera color response testing and calibration device and method

A color camera and color response technology, applied in TV, electrical components, image communication, etc., can solve problems such as deviation, and achieve the effect of accurate calibration, high efficiency, and consistency

Active Publication Date: 2017-06-09
HEFEI I TEK OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the problem of color response deviation correction of industrial cameras in machine vision technology. By embedding a camera color correction module in the image sensing data at the front end of the camera, the accuracy of camera color recognition is improved and the complexity of subsequent system image processing is reduced.

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  • An industrial color camera color response testing and calibration device and method
  • An industrial color camera color response testing and calibration device and method
  • An industrial color camera color response testing and calibration device and method

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Embodiment Construction

[0017] Such as figure 1 As shown, an industrial color camera color response test and correction device of the present invention, the whole device is placed in a dark room, including a computer 2, an LED drive controller 3, an RGB three-color LED array light source 4, an integrating sphere 5, and a colorimeter 6, the camera to be tested 7, the data transmission cable 8, the data acquisition card 9; the camera to be tested 7 and the integrating sphere 5 are all placed on the optical platform 1, the camera to be tested 7 is connected to the data acquisition card 9 through the data transmission cable 8, and the computer 2. Obtain image data through the data acquisition card 9. The light outlet of the integrating sphere 5 is vertically aligned with the camera 7 to be tested, so that the light is evenly irradiated on the sensor of the camera 7 to be tested; the distance from the light outlet of the integrating sphere 5 to the sensor of the camera 7 to be tested is not less than the ...

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Abstract

The invention discloses a method for testing and correcting the color response of an industrial color camera, comprising the following steps: adjusting RGB three-color LED array light sources to output standard test light, collecting multiple image data, and calculating the average value of RGB pixel output responses of different image cameras, Establish a response coefficient correction table with consistent RGB pixel response output under the same RGB light intensity; adjust the light source to other standard lighting conditions, collect multiple image data under the corresponding lighting conditions, and calculate the RGB pixel output response of different images mean. The camera color correction model under different standard lighting conditions is fitted by least squares, so that the camera output color matches the standard color, and this model is input into the camera color correction module to complete the correction.

Description

technical field [0001] The invention relates to the field of industrial camera performance detection in machine vision, in particular to an industrial color camera color response test and correction device and method. Background technique [0002] Machine vision systems are widely used in industry, agriculture, medicine, military, aerospace, meteorology, astronomy, public security, transportation, security, scientific research and other industries. Machine vision technology converts the detected target into a digital image signal through an industrial camera. According to the image pixel distribution, brightness, color and other information, the image processing system extracts the characteristics of the target based on the algorithm, obtains the shape information of the measured target, and then according to the measured target information to control on-site equipment actions. Industrial cameras are key components of image information acquisition in machine vision systems....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00
Inventor 董宁唐世悦吴畅叶加圣
Owner HEFEI I TEK OPTOELECTRONICS CO LTD
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