Evaluation of the minimum circumscribed circle based on the chord and its two corresponding minimum angles

Li, Xiuming; Li, Yujie; Chen, Runqi; Chi, Jinling; Shi, Xiuzhi; H, Lin

doi:10.1016/j.measurement.2022.111754

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…A least outer circle is the smallest circle that can enclose a given shape, described by a center coordinate and a radius. In image processing, the minimum enclosing circle is often used to describe and analyze the shape and position of an object [24]. In OpenCV, the function cv2.minEnclosingCircle() can be used to compute the minimum enclosing circle [21], which is usually returned as a tuple (center, radius), where center is the coordinates of the center of the circle and radius is the radius.…”

Section: Minimum External Circlementioning

confidence: 99%

Automated Alignment of U-Notch in Iron Caps Using Machine Vision: A System for Suspended Insulators

Kang,

Zhang,

Wang

2024

PMDF

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In the automated production line for suspended insulators, precise alignment of the U-shaped notch in iron caps is crucial for effective gluing. This study introduces a system based on machine vision that automates the alignment process. The system initially preprocesses the images of iron caps to segment the U-shaped contour. It utilizes the method of quadratic maximum contour connectivity domain to accurately identify the target U-shaped region. The alignment process involves calculating the coordinates of the largest external rectangle's longest edge and the external circle's center point. These coordinates are instrumental in determining the necessary rotation angle for proper notch alignment. The fixture then adjusts the iron cap based on this calculated angle, ensuring precise alignment. Experimental validations of this system have demonstrated a notch alignment error within 0.5 degrees with 96.51% accuracy and an error within 1 degree with 100% accuracy. The algorithm's execution time is a swift 0.034 seconds. Both the error margins and operational speed satisfy the stringent requirements of the automatic production line.

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Section: Minimum External Circlementioning

confidence: 99%

Automated Alignment of U-Notch in Iron Caps Using Machine Vision: A System for Suspended Insulators

Kang,

Zhang,

Wang

2024

PMDF

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A unified approach for evaluation of the minimum circumscribed circle and maximum inscribed circle

Hao,

Tang,

Zuo

et al. 2024

Meas. Sci. Technol.

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a unified method is proposed to evaluate the minimum circumscribed circle and maximum inscribed circle. Initial three candidate points are selected with the one-point operator and two-point operator. The two-point operator is also used to select candidate points or determine redundant data points during iterations. Examples from the literatures confirm the effectiveness and accuracy of the proposed algorithm.

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Evaluation of the minimum circumscribed circle based on the chord and its two corresponding minimum angles

Cited by 2 publications

References 12 publications

Automated Alignment of U-Notch in Iron Caps Using Machine Vision: A System for Suspended Insulators

Automated Alignment of U-Notch in Iron Caps Using Machine Vision: A System for Suspended Insulators

A unified approach for evaluation of the minimum circumscribed circle and maximum inscribed circle

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