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Three-dimensional information acquisition device and method based on compressed sensing pulse code modulation

A technology of pulse code modulation and three-dimensional information, which is applied in the direction of measuring devices, optical devices, instruments, etc.

Inactive Publication Date: 2015-07-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, there is no literature report on the application of compressive sensing theory to the field of 3D information acquisition of spatial 3D coded modulation

Method used

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  • Three-dimensional information acquisition device and method based on compressed sensing pulse code modulation
  • Three-dimensional information acquisition device and method based on compressed sensing pulse code modulation
  • Three-dimensional information acquisition device and method based on compressed sensing pulse code modulation

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Experimental program
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Embodiment 1

[0055] Such as figure 1 As shown, a three-dimensional information acquisition device based on compressed sensing pulse code modulation, the spatial light modulator in the device adopts a reflective spatial light modulator, and the reflective spatial light modulator here can be a reflective liquid crystal on silicon device ( LCOS) or a reflective digital micromirror device (DMD), etc., preferably a reflective digital micromirror device (DMD) in this embodiment.

[0056] The above-mentioned three-dimensional information acquisition device includes: a pulsed laser light source 1, an imaging system 2, a DMD spatial light modulator 3, a converging lens 4, a single-point detector 5, an image generation and loading module 6, a high-speed data acquisition module 7, and a calculation and storage module 8 , synchronous detection module 9 and beam splitting prism 10.

[0057] The pulsed laser light source 1 emits pulsed laser light to irradiate the target scene, the imaging system 2 col...

Embodiment 2

[0080] Such as Figure 4 Shown is a three-dimensional information acquisition system based on compressive sensing using a transmission-type spatial light modulator as a spatial light modulator. Here, the transmissive spatial light modulator may be a transmissive liquid crystal on silicon device (LCOS) or the like. Figure 4 The transmission-type liquid crystal device is taken as an example, including a pulsed laser light source 1, an imaging system 2, a transmission-type spatial light modulator 11, a converging lens 4, a single-point detector 5, an image generation loading module 6, a high-speed data acquisition module 7, a calculation A storage module 8 , a synchronous detection module 9 and a beam splitting prism 10 .

[0081] In this system, the transmission-type spatial light modulator 11 is used as the spatial light modulator, the pulsed laser light source 1 emits pulsed laser light to irradiate the target scene, and the imaging system 2 collects the diffuse reflection l...

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Abstract

The invention discloses a three-dimensional information acquisition method based on compressed sensing pulse code modulation. The method includes: emitting a pulse laser via a pulse laser source to irradiate a target scene and be imaged onto a spatial light modulator, and then performing code modulation to a target scene image according to a two-dimensional random modulation image loaded thereon; converging light intensity of the modulated image to obtain total light intensity of modulated different distance echoes, and receiving via a single-station detector; utilizing a high-speed data acquisition module to acquire total light intensity of detected different distance echoes of the single-station detector; and using a one-dimensional random modulation matrix for modulating the total light intensity of the different distance echoes, summing to obtain total light intensity of all distance echoes subjected to twice modulation, repeating the steps for multiple metering of the target scene to obtain total light intensity of echoes of multiple metering, and finally utilizing a compressed sensing algorithm for one-time calculation to complete acquisition of three-dimensional information of the target scene. The invention further discloses a three-dimensional information acquisition device based on compressed sensing pulse code modulation.

Description

technical field [0001] The present invention relates to the field of three-dimensional information acquisition, in particular to a three-dimensional information acquisition device and method based on compressed sensing pulse code modulation. 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. The more popular ones today are: [0003] Based on the method of computer vision, three-dimensional information can be obtained from two-dimensional graphics, and three-dimensional information of a large field of view can be obtained; using the time-of-flight method, the target object is scanned within a certain range, and two-dimensional information can be obtained at the same time The time-of-flight of the detection pulse is used to obtain the depth information of the target object. The im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 刘旭李东李海峰夏新星王金成刘向东
Owner ZHEJIANG UNIV