Three-dimensional reconstruction data acquisition system based on intensity transmission equation

Abstract

The invention provides a three-dimensional reconstruction data acquisition system based on an intensity transmission equation. The system comprises a first controllable rotary circular guide rail, a second controllable rotary circular guide rail, a first CCD fixed on the first controllable rotary circular guide rail, a second CCD fixed on the second controllable rotary circular guide rail and an illumination light source. According to the system, the two controllable rotary circular guide rails are used for driving the CCDs fixed on the two controllable rotary circular guide rails to rotate ata constant speed at the same time, multi-angle intensity images can be obtained, focusing images and defocusing images required by phase recovery of the intensity transmission equation can be obtained at the same time, the defect of mechanical translation of the CCDs in a traditional TIE technology is overcome, and a powerful guarantee is provided for rapid and accurate multi-angle intensity transmission equation phase recovery and subsequent real-time three-dimensional reconstruction.

Description

technical field [0001] The invention relates to the technical field of optical measurement and three-dimensional reconstruction, in particular to a three-dimensional reconstruction data acquisition system based on an intensity transmission equation. Background technique [0002] Different from traditional two-dimensional imaging, three-dimensional imaging carries the role of obtaining more information from the real world, so it has a wider range of applications. The so-called three-dimensional information generally refers to the depth information of an object other than two-dimensional image information, which is contained in the optical wave field of the object. Therefore, in some cases, three-dimensional imaging can be regarded as the amplitude and phase imaging of the object light wavefront. [0003] The amplitude of the object light wave can be directly acquired by the camera, but the phase cannot be directly detected. The most classic phase measurement method is inter...

AI Technical Summary

Problems solved by technology

[0003] The amplitude of the object light wave can be directly obtained by the camera, but the phase cannot be directly detected

The most classic phase measurement method is interferometry, but this method has the following disadvantages: (1) light waves enter the sensor area along different independent paths, and the measurement results will be seriously damaged by vibration (caused by environmental interference); ( 2) The time coherence requirements of the light source are very high, which requires more complex interference devices, etc.

[0010] In addition to the complex structure, the above two systems cannot simultaneously acquire focused images and defocused images, so they cannot quickly and accurately recover phase information based on the intensity transfer equation, which makes subsequent 3D reconstruction difficult to achieve real-time reconstruction

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