Method and system for decomposing phase of structured light system based on reference image
A technology of structured light system and reference image, which is applied in the field of phase resolution of structured light system based on reference image, can solve complex problems and achieve the effect of reducing working condition requirements and improving scanning efficiency
Active Publication Date: 2020-04-07
深度创新科技(深圳)有限公司
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[0005] The traditional method is to re-project multiple gray-coded binary fringe images to calculate the number of cycles, which is relatively complicated, so it is necessary to improve this technology
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[0046] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0047] The invention discloses a new practical phase resolution method, which only needs to project 4 images to the target scene, including 3 phase shift fringe images and 1 reference texture image. Before the modeling begins, a flat target (such as a wall) is photographed with a structured light system. In the collected image of the planar target, the fringe image is used to calculate the number of cycles corresponding to each pixel of the reference texture image. When modeling, as long as the corresponding relationship between the current texture map and the texture map in the preparation process is established, the pixel points of the current view can be directly mapped to the cycle number, and then combined with the relative phase value obtained by the phase shift method, the absolute phase can be obta...
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The invention discloses a reference image-based structured light system phase demodulation method. The method comprises the following steps: in preparation, the system controls the structured light system to project and shoot a plane scene, two images which are a black and white binary fringe image and a texture image are projected on a target plane, corresponding two images are acquired, the fringe image is analyzed, and a periodic number corresponding to each pixel point in the texture image is obtained; and in a modeling process, the system controls the structured light system to project and shoot a plane scene, four images which are three phase shift fringe images and a texture image are projected on the target plane, the corresponding relationship between the texture image acquired currently and the texture image acquired in the preparation process is built, a periodic number corresponding to each pixel point in the current view is acquired, the relative phase of each pixel is obtained through the phase shift method for the three images, and in combination of the periodic number, the relative phase of each pixel in the current view is obtained.
Description
technical field [0001] The invention relates to the field of three-dimensional surface scanning modeling, in particular to a reference image-based structured light system phase resolution method and system. Background technique [0002] 3D surface scanning modeling has a wide range of applications in product inspection, reverse engineering, 3D printing, anthropometry, human-computer interaction, animation production and other fields. Currently popular methods include laser scanning method, stereo vision method, time-of-flight (ToF) method and structured light method, etc. [0003] The phase shift method is known for its high precision. Phase-shift structured light systems can generally be divided into single-projection-single-camera systems and single-projection-dual-camera systems. [0004] The classic phase shift method needs to project at least three phase-shifted fringe images to the target surface, and recover the phase value at each pixel of the camera image by analy...
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IPC IPC(8): G01B11/25
CPCG01B11/254
Inventor 朱宪伟徐玉华周阳
Owner 深度创新科技(深圳)有限公司