Three-dimensional information obtaining method based on correlated imaging

Abstract

The invention discloses a three-dimensional information obtaining method based on correlated imaging, which includes the steps as follows: the detecting light emitted by a light source is projected to the target object after being processed through a spatial light modulator, so as to detect the reflected light from the target object; the reflected light is modulated for twice by a preprocessing unit and stored respectively; and the three-dimensional information of the target object is obtained by calculating the random image stored in a register and the modulated light intensity information. The three-dimensional information obtaining method based on the correlated imaging modulates the three-dimensional object after obtaining the light intensity signal array, only requires twice two-dimensional information calculation to obtain the three-dimensional information, and is suitable for obtaining the remote and quick three-dimensional information.

Description

technical field [0001] The invention belongs to the field of three-dimensional information acquisition, in particular to a three-dimensional information acquisition and processing method based on the principle of correlation imaging, which can be used for long-distance three-dimensional imaging. Background technique [0002] The acquisition of 3D information has been widely used in 3D modeling, target detection and other fields, and various methods have been developed, each with its own advantages and disadvantages and scope of application. Nowadays, there are more popular computer vision-based methods, which can obtain three-dimensional information from two-dimensional graphics, and can realize the acquisition of three-dimensional information in a large field of view; use the time-of-flight method to scan the target object within a certain range, and obtain two-dimensional information. The time-of-flight of the detection pulse can be obtained at the same time as the three-d...

AI Technical Summary

Problems solved by technology

Nowadays, there are more popular computer vision-based methods, which can obtain three-dimensional information from two-dimensional graphics, and can realize the acquisition of three-dimensional information in a large field of view; use the time-of-flight method to scan the target object within a certain range, and obtain two-dimensional information. The time-of-flight of the detection pulse can be obtained at the same time as the three-dimensional information, so as to obtain the depth information of the target object. The image acquisition speed and resolution are limited by the scanning speed and the number of scanning points; the use of contact probe measurement can achieve accurate detection of smaller volume objects. measurement, but the equipment is expensive, the acquisition speed is slow, and it is easy to cause damage to the surface of the target object; the use of structured light for active measurement of the target object has fast scanning speed and high measurement accuracy, which is more suitable for indoor object surface reflection better occasion

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