Encoding array determination method, initialization method, structured light encoding method, optical device and three-dimensional measurement device

Abstract

A method for determining an encoding array, an initialization method, a structured light encoding method, an optical device, and a three-dimensional measuring device. The method for determining an encoding array includes: determining the i-th stripe in an image to be encoded and several stripes in its neighborhood along the encoding direction stripe (S201); according to the code value of the i-th stripe and the code values ​​of several stripes, generate a code value matrix of the i-th stripe (S202); according to the code value matrix of the i-th stripe and The code values ​​of all the previous i-1 stripes (S203), generate a code array, i is greater than or equal to 2. The determination method of the encoding array avoids the slow measurement speed caused by projecting multiple encoded images onto the target object in time sequence in the time encoding method, and avoids the use of adjacent pixel information (such as color, pixel value) in the spatial encoding method or geometric shape) to generate code values ​​resulting in less measurement accuracy.

Description

technical field [0001] The embodiments of the present application relate to the technical field of data processing, and in particular to a method for determining an encoding array, an initialization method, a structured light encoding method, an optical device, and a three-dimensional measuring device. Background technique [0002] Three-dimensional sensing technology can be divided into contact measurement and non-contact measurement. For non-contact measurement, optical three-dimensional measurement based on structured light projection is widely used, and its measurement accuracy and speed are similar to optical measurement of structured light projection. The encoding used in 3D measurement is directly related. [0003] In the prior art, coding methods mainly include a time coding method and a spatial coding method. Among them, in the time encoding method, multiple encoded images are projected onto the target object in time sequence, and each projection generates a code v...

AI Technical Summary

Problems solved by technology

Among them, in the time coding method, multiple coded images are projected onto the target object in chronological order, and each projection generates a code value for each pixel in the coded image, which will result in more coding times and slower measurement speed

In the spatial coding method, only one coded image is projected onto the target object, and the adjacent pixel information (such as color, pixel value or geometric shape) is used to generate the code value. However, because the adjacent pixel information is easily lost, the measured Less precision

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