Projecting device and projecting calibration method
A technology of projection equipment and correction method, which is applied in the direction of using projection device image reproducer, image data processing, color TV, etc., can solve the problem of digital light ray shift, projection deformation of scanning galvanometer projector, affecting three-dimensional point cloud problems of accuracy
Active Publication Date: 2021-06-25
IND TECH RES INST
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[0003] The cost of scanning galvo projectors is lower than that of digital light processing projectors. However, although the cost of scanning galvo projectors is lower, the digital light generated by scanning galvanometer projectors will have ray shifting. phenomenon, which makes the projection of the scanning galvanometer projector deformed, which in turn affects the accuracy of the output 3D point cloud
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[0016] The technical terms in this specification refer to the customary terms in this technical field. If some terms are explained or defined in this specification, the explanation or definition of this part of the terms shall prevail. Each embodiment of the present disclosure has one or more technical features respectively. On the premise of possible implementation, those skilled in the art may selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.
[0017] In the various embodiments listed below, the same or similar elements or components will be denoted by the same reference numerals.
[0018] figure 1 is a schematic diagram of a projection device according to an embodiment of the present invention. In this embodiment, the projection device 100 may be applicable to a three-dimensional (three-dimension, 3D) camera, mobile phone, tablet computer, notebook computer, etc...
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A projecting apparatus includes a projecting device, an image-capturing device and a processing device. The projecting device projects a reversible structured light code onto a surface. The image-capturing device captures the reversible structured light code projected onto the surface and obtains image data. The processing device is coupled to the projecting device and the image-capturing device. The processing device receives the image data, generates three-dimensional point cloud information via the image data, and obtains scanning shift information corresponding to the projecting device according to the three-dimensional point cloud information and three-dimensional information corresponding to the surface.
Description
technical field [0001] The invention relates to a projection device and a projection correction method. Background technique [0002] Due to the development and evolution of technology, Structured-light 3D scanners (Structured-light 3D scanner) are gradually used by users. Generally speaking, the cost of a structured light 3D scanning camera mainly depends on the projector installed in it. Currently, on the market, the projectors used in the structured light 3D scanning cameras are digital light processing (digital light processing, DLP) projectors, scanning galvanometer projectors, and the like. [0003] The cost of scanning galvo projectors is lower than that of digital light processing projectors. However, although the cost of scanning galvo projectors is lower, the digital light generated by scanning galvanometer projectors will have ray shifting. This phenomenon makes the projection of the scanning galvanometer projector deformed, which in turn affects the accuracy of...
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IPC IPC(8): H04N9/31H04N13/363
CPCH04N9/3141H04N9/3185H04N13/363G06T7/521G01B11/2504G01B11/2518G06T2200/08G06T2207/10028G06T17/20
Inventor 甘凯翔陈柏戎陈俊元郭建春
Owner IND TECH RES INST