Efficient Measurement of Key-Cap Flatness for Computer Keyboards With a Multi-Line Structured Light Imaging Approach

Miao, Huisi; Xiao, Changyan; Wei, Min; Li, Yucheng

doi:10.1109/jsen.2019.2928148

Cited by 14 publications

(8 citation statements)

References 22 publications

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“…As an actuator, SMC MHZ2-25D pneumatic gripper is installed at the end of the manipulator, which is used to grab and place objects. By controlling the opening and closing of the pneumatic gripper, articles can be grabbed and sorted [7].…”

Section: Figure 1 Mechanical Arm Modelmentioning

confidence: 99%

Design and Implementation of Intelligent Robot Control System Integrating Computer Vision and Mechanical Engineering

Liu,

Zhu

2024

IJCSIT

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With the rapid development of science and technology and industry, robot technology has become a key pillar in many fields, especially in industrial manufacturing, robots have been widely used in automated operations. However, in the face of the complex and changeable demands of modern industry, simple mechanized operation can no longer be satisfied, and intelligence has become the inevitable trend of robot technology development. By combining computer vision technology, this study provides robots with powerful environmental awareness and target recognition capabilities, thus achieving higher-level autonomous operation and decision-making. Aiming at the intelligent sorting system, this research adopts XYZ mechanical arm as the execution platform, equipped with TCS34725 color sensor to identify the color of articles, and integrates Hikvision industrial camera and NVIDIA Jetson TX2 image processor to capture and process image data, so as to achieve accurate positioning of articles. In the aspect of software design, this research realizes the function of accurately sorting different color items from the conveyor belt by combining color recognition algorithm and image processing technology with mechanical engineering control. The test results of the system show that the system has high accuracy and stability in color recognition and object positioning, and the trajectory accuracy of the manipulator meets the requirements, which verifies the realization of the research goal. The intelligent robot control system designed in this paper not only improves the level of industrial automation and reduces labor costs, but also broadens the application fields of robots in complex environments.

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Section: Figure 1 Mechanical Arm Modelmentioning

confidence: 99%

Design and Implementation of Intelligent Robot Control System Integrating Computer Vision and Mechanical Engineering

Liu,

Zhu

2024

IJCSIT

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“…This method effectively addresses the challenge of obtaining accurate angle and position data, allowing for the efficient retrieval of a 3D shape of an object. Miao et al 22 . proposed an online rapid keycap flatness inspection device that is based on multiline structured light imaging and machine vision.…”

Section: Introductionmentioning

confidence: 99%

“…This method effectively addresses the challenge of obtaining accurate angle and position data, allowing for the efficient retrieval of a 3D shape of an object. Miao et al 22 proposed an online rapid keycap flatness inspection device that is based on multiline structured light imaging and machine vision. The device uses a multistep image processing method to accurately extract the centerline of the projected stripes on the keycaps with printed characters, thereby indirectly improving the measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency flatness detection method for medium-thick steel plates based on multiline parallel laser vision

Xia,

Wang,

Wang

et al. 2023

Opt. Eng.

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.To resolve the disparity between accuracy and speed in the current surface flatness detection of medium and thick steel plates, which predominantly relies on the single-line laser vision method, we propose a high-efficiency flatness detection method for medium-thick steel plates based on multiline parallel laser vision. On the basis of building a flatness detection system, we present the adaptive cropping algorithm and improved variable threshold Otsu thresholding segmentation algorithm (IVT-Otsu) for image preprocessing. Then, the centerline of subpixel-level laser stripes is accurately extracted using a weighted quadratic grayscale center of gravity method. Meanwhile, a pruning algorithm-based multiline laser stripe center extraction method is proposed to address the phenomenon of spotting and branching in the center of multiline parallel laser, to efficiently obtain the surface depth information and flatness index of medium-thick steel plate. Results of the experiment indicate that the proposed method better fulfills the accuracy and efficiency requirements for online inspection when extracting the laser centers and calculating the flatness.

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“…For instance, Wu 38 designed a 3D measurement system utilizing a three-line laser to measure the diameter of a sphere with a measurement error of 0.01 mm. In reference 39 , a multi-line structured light measurement method was employed, achieving a detection accuracy of 99.74% for various computer keyboards. Li 40 designed a multi-line structured light measurement system, with the measurement error of objects being within 0.4 mm.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional vision measurement method based on double-line combined structured light

Wang,

Sun,

Gao

et al. 2023

Sci Rep

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In this paper, a structured light vision measurement method using a scanning laser line and a positioning laser line is proposed. The novel method enables the scanning laser plane to slide along a slide rail while maintaining intersection with the positioning laser plane, eliminating the need to determine the scanning direction and moving step. During the measurement process, the laser plane equations need to be recalibrated for each new position, so a real-time calibration method is given. Initially, the geometric barycenter method is employed to detect the subpixel coordinates of the light stripe intersection point. Subsequently, these coordinates are projected into the camera coordinate system using the initial equations of the positioning laser plane. Finally, leveraging the normal information of the initial equation of the scanning laser plane and the three-dimensional coordinates of the light stripe intersection point, the real-time calibration of the scanning laser plane equations can be accomplished. The proposed method enables the three-dimensional reconstruction of objects, and its accuracy is verified through measurements on gauge blocks. Experimental results demonstrate that this method achieves precise and stable three-dimensional reconstruction of object surface shape.

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Efficient Measurement of Key-Cap Flatness for Computer Keyboards With a Multi-Line Structured Light Imaging Approach

Cited by 14 publications

References 22 publications

Design and Implementation of Intelligent Robot Control System Integrating Computer Vision and Mechanical Engineering

Design and Implementation of Intelligent Robot Control System Integrating Computer Vision and Mechanical Engineering

High-efficiency flatness detection method for medium-thick steel plates based on multiline parallel laser vision

A three-dimensional vision measurement method based on double-line combined structured light

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