Large free form measurement using slit beam

Heo, EunChang; Kwon, MinChel; Kim, ByoungChang

doi:10.1109/iccas.2008.4694335

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…Therefore, this study optioned to use a DSLR (Digital Single Lens Reflector) camera for measurement. Although commercial DSLR lenses distortion are larger than industrial lenses, the image distortion can be fixed by calibration [9].…”

Section: Shape Detectionmentioning

confidence: 99%

“…In 2004, Guan et al used composite pattern structured light for 3D reconstruction, in which the depth information of objects was measured using modulating multi-line structured light measurement technology [7]. Besides cylindrical steel bar measurement, the same method can also be adopted for the measurement for steel plate and other plate-like materials [8][9][10]. -1.85 -1.85 -3.65 5.5…”

Section: Introductionmentioning

confidence: 99%

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Applying Structured Light on Cylinder Straightness Detection Using Break Line Method

Lee

Hsu

Pan

et al. 2015

AMM

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Generally after a cylindrical steel bar is made from hot forming process, its contour will look like ‘U’ or ‘wavy’ topography. The preformed steel bar after steelmaking process needs to remove the outside oxide layer by lathe or peeling machine (commonly known as stripping). As a consequence, the deformation of steel bar will cause subsequent problems, such as eccentric rotating of steel bar as the lathe is running. Although it is necessary to remove the oxide layer, the deformation will increase waste materials. To prevent the problems, a straightening machine is usually used to straighten the cylindrical steel bar before the pickling process. However, most current straightening machines cannot measure cylindrical steel bar contour on-line instantly. This study proposed a test method for measure the contour of a large cylindrical steel bar based on multi-line structured light and machine vision. Break line method were performed to measure the contour of the cylindrical steel bar. The experimental result shows that the measurement error is in the range of ±0.4 mm after calibration. The study result concludes that the proposed method can be applied to straightening machine for real-time online measurement to improve straightening efficiency.

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Section: Shape Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Applying Structured Light on Cylinder Straightness Detection Using Break Line Method

Lee

Hsu

Pan

et al. 2015

AMM

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Binocular vision measurement for large-scale weakly textured ship hull plates using feature points encoding method

Zhao,

Hu,

Wang

et al. 2023

Measurement

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Experimental Evaluation of Highly Accurate 3D Measurement Using Stereo Camera and Line Laser

Nonaka,

Pathak,

Umeda

2023

J. Robot. Mechatron.

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This paper proposes a method to improve the accuracy of 3D measurement of a stereo camera by marking a measured object using a line laser. Stereo cameras are commonly used for 3D measurement, but the accuracy of 3D measurement is affected by the amount of texture. Therefore, a new measurement system combining a stereo camera and a line laser is developed. The accuracy of 3D measurement with a stereo camera is improved by using a line laser to mark arbitrary points on the measured object and measuring the marked points, regardless of the amount of texture on the measured object. Because the laser is only used to mark points on the measurement target, calibration is not required with the stereo camera. Experimental evaluation showed that our proposed method can obtain millimeters.

show abstract

Large free form measurement using slit beam

Cited by 3 publications

References 8 publications

Applying Structured Light on Cylinder Straightness Detection Using Break Line Method

Applying Structured Light on Cylinder Straightness Detection Using Break Line Method

Binocular vision measurement for large-scale weakly textured ship hull plates using feature points encoding method

Experimental Evaluation of Highly Accurate 3D Measurement Using Stereo Camera and Line Laser

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