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Camera integration time adjusting time based on beam function and image feature

A technology of integration time and beam function, which is applied in the field of exposure time adjustment of intersecting measurement cameras, and can solve problems such as excessive target energy

Active Publication Date: 2014-11-05
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0006] The technical solution of the present invention is to overcome the deficiencies of the prior art and provide a camera integration time adjustment method based on the beam function and image features, which can stabilize the gray level of the target image within the capability of the camera measurement system through the adjustment of the camera integration time. Within the scope of stable work, it effectively solves the problem of too strong or too weak target energy, thus laying the foundation for accurate light spot extraction

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  • Camera integration time adjusting time based on beam function and image feature
  • Camera integration time adjusting time based on beam function and image feature
  • Camera integration time adjusting time based on beam function and image feature

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[0060] Taking the test results of a certain camera as an example, the parameters related to the integration time setting mainly include: focal length 26mm, entrance pupil diameter 7mm, theoretical object distance 2m, measurement range 1m-8m, image 8-bit output, full well gray level 255 , the integral time adjustment equivalent is 0.1ms, the specific implementation process is as follows:

[0061] (1) Complete the test of determining the camera integration time coefficient; collect the target images of each test point and record the best camera integration time T of each target image i ;

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Abstract

The invention discloses a camera integration time adjusting time based on a beam function and an image feature. Corresponding camera integration time adjusting functions are constructed in combination with the physical feature differences and confusion circle change of a target image among different measuring distances, and the camera integration time is dynamically adjusted to stabilize the grey level of the target image within a range in which a camera measuring system can work stably, so that the problem of influence on normal measurement of an optical imaging sensor due to the change of the energy of the target image along with the change of the measuring distance is effectively solved, and the working capacity of the lunar orbit rendezvous and docking optical imaging sensor in a large-range complex environment is increased.

Description

technical field [0001] The invention relates to a camera integration time adjustment method based on beam function and image features, which can stabilize the gray level of the target image within the range where the camera measurement system can work stably through the adjustment of the camera integration time, and is mainly used in spatial intersection measurement cameras exposure time adjustment. Background technique [0002] Lunar orbital rendezvous and docking is one of the key technologies of the third phase of the lunar exploration project. In the translational approach section of the rendezvous to approach distance, that is, when the distance between the two aircraft is from 150 meters to the completion of docking (about 0.3 meters), the optical imaging sensor is the only device that can simultaneously provide position and attitude six-degree-of-freedom measurement information. Mission critical equipment. [0003] The measurement target of lunar orbit rendezvous an...

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Application Information

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IPC IPC(8): H04N5/235
Inventor 郭绍刚赵春晖刘鲁龚德铸华宝成刘启海
Owner BEIJING INST OF CONTROL ENG
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