这就可以由彩色条纹的颜色识别零级条纹和条纹级次，由彩色条纹色序判断条纹级次的增减。
The zero orders and the fringe orders can be found by the use of the colors and the color order of the color fringes, and the increase or decrease of the fringe orders can also be judged.
外极线约束将可能的候选点限制在直线分布，引入编码光用来确定光栅条纹的级次。
Epipolar constraint was applied to limit candidate-matching point to a line distribution and coding structured light was used to tell the grating index.
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