Stripe color coding method for grating stripe images based on Gray code principle

Abstract

The invention provides a stripe color coding method for grating stripe images based on the Gray code principle, using six colors in a three-dimensional scanning system. The six colors which are not easy to be influenced by factors such as lights, and the like or are not easy to be interfered with other colors in eight pure colors are selected to carry out color stripe coding, thereby the color and the amount of colored stripes are selected; the stripes of the six selected colors are respectively coded; colored stripe combination of the stripes of the six selected colors having the length of four colored stripes and satisfying the Gray code principle is listed to be used as a region to be selected to carry out colored stripe coding until combination number of the rest unused colored stripe coding in the region to be selected is less than five, and colored stripe coding with unique sequence period and random coding period initial position is obtained. The colored stripe coding is used to design projection grating, and the precision and the accuracy of a phase method in the three-dimensional scanning system are improved.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional information reconstruction. Based on the gray coding principle, six colors are used to obtain a color stripe coding method with a unique sequence period and the stripe position can be determined according to any four adjacent stripes in the sequence, and particularly relates to a method A fringe color coding method for raster fringe images based on the gray coding principle using six colors. Background technique [0002] In recent years, in the three-dimensional measurement technology, the application of color images has become more and more extensive, and the color grating technology in the structured light method has also made great progress. The purpose of using color fringe coding, that is, projecting color grating, is to project a color fringe pattern arranged according to a certain rule on the measured object and collect the image with a color CCD to analyze and obtain information ...

AI Technical Summary

Problems solved by technology

However, these codes do not choose the most distinguishable color for coding. Due to the influence of external factors such as light during image acquisition, some adjacent colors will be difficult to distinguish in the later color image segmentation, and accurate boundaries cannot be obtained.

[0014] To sum up, there are two main problems in the design of color projection raster images: 1. Appropriately select the type and quantity of colors, and balance the requirements for the amount of information contained in the image and the requirements for the segmentation accuracy of the color image, because the more types of colors contained in the image More, the more phase information of the object represented, and at the same time, it will incr

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