An image acquisition method for raised characters based on laser vision technology

Li, Xueyong; Lu, Changhou; Zhang, Jianchuan; Xiao, Rujing; Ding, Jie

doi:10.1016/j.optlaseng.2012.08.011

Cited by 8 publications

(5 citation statements)

References 22 publications

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“…PTGui software is adopted to improve the image matching in this paper. From the original photo to the completion of the input to the panoramic photos, mainly includes the following steps in order to load the image, image direction order adjustment, image lens set, projection mode, the control points of the acquisition and suture, image optimization, the output image [7,8].…”

Section: Panoramic Image Stitching Technologymentioning

confidence: 99%

The Design and Implementation of Agricultural Base Virtual Roaming System Based on the 720°Panorama

Zhang¹,

Xu²,

Li³

et al. 2018

dtcse

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Virtual reality technology is the important application in the field of agricultural tools and agricultural researchers which focus with the progress of science and technology and the reform and development of agriculture. This system shows the double 360° spherical domain within the scope of agricultural base of the real environment and achieve the panoramic view, information query, navigation map, sales of agricultural products and source, and a series of auxiliary and interactive functions with the aid of 720° panoramic technology, based on the Krpano development platform and WebStorm code editing tool. The successful application of this system not only indicates that 720° panoramic technical feasibility and practicability, but also for the application of this technology in other industries to provide experience for reference. 1

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Section: Panoramic Image Stitching Technologymentioning

confidence: 99%

The Design and Implementation of Agricultural Base Virtual Roaming System Based on the 720°Panorama

Zhang¹,

Xu²,

Li³

et al. 2018

dtcse

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show abstract

“…On the other hand, according to the laser triangulation principle, light stripes are distorted by the height variation. 28 Hence, height fluctuation in the nearest neighborhood of end point can serve as a criterion to locate its position.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel high-speed dynamic length measurement system for mobile and large-scale cylinder workpiece

Guo

Zhou

Gao

2014

Proceedings of the Institution of Mechanical Engineers, Part B:

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A high-speed length measuring system for mobile and large-scale cylinder workpiece was designed and constructed. This measuring system is characterized by two stationary laser scanning systems placed on two sides of workpiece responsible for the acquisition of points of key parts. Meanwhile, for making the measuring process faster and more flexible, the virtual measurement datum planes play an important role, and are step-by-step generated according to various features of measured surface in an online virtual inspection environment. Moreover, modeling and identification of end point of workpiece are established based on height variations in its nearest neighborhood. The three-dimensional dynamic length measurement data are then obtained by calculating the displacement between end point and corresponding datum plane.The prototypal system has been tested on different real cases with several typical cylinder workpieces (length 1000 6 20 mm, diameter 50 6 25 mm). Compared with the measurement results of coordinate measuring machine, the root-mean-square errors of the measurement data are smaller than 0.035 mm. The system measurement uncertainty is better than 60.040 mm. The measuring time is less than 2 s. The proposed measuring system features high automation and high efficiency, and is most promising for on-machine applications in large geometric dimensional measurement.

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“…Many efforts have been done to get the raised characters' high-contrast image. For example, moiré method, the sinusoidal structured-light method, the single-line laser methods [2] [3]. Although most of them can get the uniform grayscale and well-separated images of characters, there are also many problems.…”

Section: Introductionmentioning

confidence: 99%

Grayscale Image Acquisition for Raised Characters Based on Grating Image

Liu

2014

AMM

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This paper presents a novel image acquisition technology for colorless raised characters. First, a grating image modulated with the height information of raised character is captured through a vision system; then, the Fourier transform method is used to get the phase of the grating image; finally, a rational design phase unwrapping method is designed to reconstruct the grayscale image of raised characters. Experiments show that the proposed method can get the well-separated images of raised characters.

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An image acquisition method for raised characters based on laser vision technology

Cited by 8 publications

References 22 publications

The Design and Implementation of Agricultural Base Virtual Roaming System Based on the 720°Panorama

The Design and Implementation of Agricultural Base Virtual Roaming System Based on the 720°Panorama

Development of a novel high-speed dynamic length measurement system for mobile and large-scale cylinder workpiece

Grayscale Image Acquisition for Raised Characters Based on Grating Image

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