A Method of Repairing the Phase Error Caused by Saturation Using Phase Fusion Algorithm

A technology of fusion algorithm and phase error, applied in the field of phase error to achieve the effect of repairing saturation error and expanding the scope of application

Active Publication Date: 2016-08-17
SICHUAN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to propose a phase fusion algorithm to repair the phase error caused by light intensity saturation

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  • A Method of Repairing the Phase Error Caused by Saturation Using Phase Fusion Algorithm
  • A Method of Repairing the Phase Error Caused by Saturation Using Phase Fusion Algorithm

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Embodiment Construction

[0010] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0011] In order to make the object, technical solution and advantages of the invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0012] attached figure 1 It is a flow chart of the phase fusion algorithm of the present invention to repair the saturation error. The equipment used consists of a CASIOXJ-A155V projector, a Prosilica GC650C camera and an ordinary computer. Among them, the resolution of the projector is 800×600, and the resolution of the camera is 640×480.

[0013] attached figure 2 It is the front view and side view of the 3D reconstruction of the wall of the scanned object when the ...

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Abstract

The invention is a method for repairing the phase error caused by saturation by using a phase fusion algorithm, and relates to how to repair the phase error caused by saturation in the field of three-dimensional measurement. Adjust the camera so that the pixels are not saturated, the projector projects a solid-color grayscale pattern on the surface of the object, and uses the camera to record the scanned image; when the camera overflows, the projector projects multiple groups of structured light patterns to scan the object, two adjacent The maximum gray value (amplitude) of the group pattern increases, and the camera records the scanned image; calculates the modulation intensity and phase of the scanned structured light image; combines the captured pure color image to normalize the modulation intensity; selects each pixel The maximum normalized modulation intensity of , and its corresponding phase is taken as the final phase. The present invention fuses by selecting the phase corresponding to the maximum normalized modulation intensity, and is not limited by the degree of saturation. When the measurement system is nonlinear, it can also effectively repair the saturation error and expand the applicable range of repairing the saturation error.

Description

technical field [0001] The invention relates to the technical field of optical three-dimensional data processing, in particular to using a phase fusion algorithm to repair phase errors generated by saturation. Background technique [0002] Phase measurement profilometry is an active, non-contact three-dimensional measurement technique. It has the advantages of high speed and high precision. This technology is widely used in fields such as product inspection, biometric identification, and 3D modeling. The measurement system of this technology is composed of a common computer, projector and camera. This technology projects a set of sinusoidal gratings onto the surface of the measured object through a projector, and the camera captures image data synchronously, and then processes the captured data to obtain the three-dimensional shape of the object. However, when the intensity values ​​of some pixels in the acquired image exceed the maximum quantization value of the camera, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/25
Inventor 刘凯孙伟文李娜
Owner SICHUAN UNIV
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