Structured light system coding method combining positive and negative Gray codes of RGB channel and stripe block translation

A technology of structured light system and coding method, which is applied in the field of structured light system coding that integrates RGB channel positive and negative gray codes and stripe block translation, can solve the problems of low measurement accuracy and accuracy, long measurement time, etc., and reduce measurement Effects of time-consuming, reduced measurement time, and simplified decoding steps

Active Publication Date: 2018-07-27
ZHEJIANG UNIV
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Problems solved by technology

The spatial encoding method generally projects an image containing complex information for measurement, which is suitable for dynamic detection, but the measurement accuracy and accuracy are not high; the temporal encoding method projects multiple interconnected images for detection, which has high precision Measurement results, but only suitable for static detection, and due to the need to project multiple images, the measurement takes a long time

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  • Structured light system coding method combining positive and negative Gray codes of RGB channel and stripe block translation
  • Structured light system coding method combining positive and negative Gray codes of RGB channel and stripe block translation
  • Structured light system coding method combining positive and negative Gray codes of RGB channel and stripe block translation

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[0026] The purpose and effects of the present invention will become clearer by describing the present invention in detail according to the accompanying drawings and preferred embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] Here, the encoding method of the present invention will be described by taking the number of binary encoding bits n=3, the stripe block width m=4, and the acquisition of a structured light system encoded image with a resolution of 32 as an example.

[0028] A structured light system encoding method that integrates RGB channel positive and negative gray codes and stripe block translation, comprising the following steps:

[0029] 1) Use the 3-bit binary Gray code encoding method to time-code the projected image, extract each bit of the Gray code, and obtain 3 forward Gray code encoding sequences, which are recorded as: S 1 =00001111, ...

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Abstract

The invention discloses a structured light system coding method combining positive and negative Gray codes of an RGB channel and stripe block translation. Firstly, a binary Gray coding method is adopted to roughly divide a measured area; then, a stripe block translation method is adopted to finely divide the measured area, coding is conducted on the RGB color channel, and the number of coded images is reduced; meanwhile, a positive and negative coding idea is adopted to eliminate errors caused by a scattering effect. Compared with other time coding methods, the structured light system coding method has the advantages that the number of projections is small, the measurement accuracy is high, meanwhile, the effect of surface colors of a measured object on a measurement result is avoided, decoding operation is simple, and the method has high robustness.

Description

technical field [0001] The invention relates to the field of three-dimensional object measurement, in particular to a structured light system coding method that integrates RGB channel positive and negative Gray codes and stripe block translation. Background technique [0002] Structured light three-dimensional measurement technology is a non-contact active projection measurement technology, which has the advantages of high measurement accuracy, wide application scenarios, strong anti-interference ability, and simple operation. It is an ideal three-dimensional measurement method. The main equipment of the structured light 3D measurement system includes two parts: projector and camera, such as figure 1 As shown, the projector projects the image with coded information onto the measured object, the camera shoots the object, and by decoding the modulated image, the height information of the measured object can be calculated to realize three-dimensional measurement. [0003] The ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/25
CPCG01B11/022G01B11/2509G01B11/2518
Inventor 刘山李栋
Owner ZHEJIANG UNIV
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