Long-Range Binocular Vision Target Geolocation Using Handheld Electronic Devices in Outdoor Environment

Deng, Fang; Zhang, Lele; Gao, Feng; Qiu, Huangbin; Gao, Xin; Chen, Jie

doi:10.1109/tip.2020.2984898

Cited by 18 publications

(3 citation statements)

References 41 publications

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“…Numerous methods have been proposed for target geolocation, including monocular vision (Lategahn & Stiller, 2014), binocular vision (Deng et al, 2020), and multi-vision (Brickwedde et al, 2019). Comparatively, targets can be located through one shot by monocular vision, thereby reducing hardware cost and deployment complexity in the wild environment.…”

Section: R E S E a R C H A R T I C L E Wltog : An Optimization Approa...mentioning

confidence: 99%

“…However, most surveillance videos lack geospatial information, such as geographical location, attribute characteristics, and temporal characteristics, due to the absence of mapping relationships with the physical world (Xie et al, 2021), which limits the geospatial application of surveillance videos. Numerous methods have been proposed for target geolocation, including monocular vision (Lategahn & Stiller, 2014), binocular vision (Deng et al, 2020), and multi‐vision (Brickwedde et al, 2019). Comparatively, targets can be located through one shot by monocular vision, thereby reducing hardware cost and deployment complexity in the wild environment.…”

Section: Introductionmentioning

confidence: 99%

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WLTOG: An optimization approach for wild large‐range target omnidirectional geolocation based on monocular PTZ camera

Zhou

Yuan

Tang

et al. 2022

Transactions in GIS

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The pan‐tilt‐zoom (PTZ) cameras are increasingly popular in urban management and resource protection due to their omnidirectional coverage and reasonable cost. Traditionally, the research of monocular camera geolocation focuses on small‐range ones with a central projection camera under ideal conditions, making it challenging to meet the requirements of omnidirectional coverage and large‐range geolocation for PTZ cameras. In this article, a wild large‐range target omnidirectional geolocation (WLTOG) algorithm was proposed. Firstly, the WLTOG algorithm is used to transform the target in a single image to the camera's optical axis, thereby obtaining the camera posture value. After that, by using a high‐order overdetermined equation, it fits the nonlinear mapping relationship between multiple pairs of PTZ camera postures and the geospatial coordinates. At last, it realizes the bidirectional calculation between pixel coordinates and geospatial coordinates. The experimental PTZ camera is mounted on a communication tower in a wild environment. Therefore, this method can be utilized to construct an omnidirectional geolocation relationship that meets the requirements of omnidirectional geolocation within 945 m based on unknown accurate internal and external orientation elements. The WLTOG algorithm is conducive to the geometric measurement of video and GIS‐augmented video surveillance.

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Section: R E S E a R C H A R T I C L E Wltog : An Optimization Approa...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

WLTOG: An optimization approach for wild large‐range target omnidirectional geolocation based on monocular PTZ camera

Zhou

Yuan

Tang

et al. 2022

Transactions in GIS

View full text Add to dashboard Cite

show abstract

“…Scholars have recently focused on improving structural parameters. Deng et al [18] improved the binocular localization model based on the structural adjustment of focal length and baseline, and the localization error was well reduced. Shi et al [19] proposed an online binocular sensor measurement method based on iterative gradient descent nonlinear optimization and improved calibration, and the performance was validated with a calibration error of less than 6%.…”

Section: Introductionmentioning

confidence: 99%

Improved Calibration of Eye-in-Hand Robotic Vision System Based on Binocular Sensor

Yu,

Liu,

Yue

2023

Sensors

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Eye-in-hand robotic binocular sensor systems are indispensable equipment in the modern manufacturing industry. However, because of the intrinsic deficiencies of the binocular sensor, such as the circle of confusion and observed error, the accuracy of the calibration matrix between the binocular sensor and the robot end is likely to decline. These deficiencies cause low accuracy of the matrix calibrated by the traditional method. In order to address this, an improved calibration method for the eye-in-hand robotic vision system based on the binocular sensor is proposed. First, to improve the accuracy of data used for solving the calibration matrix, a circle of confusion rectification method is proposed, which rectifies the position of the pixel in images in order to make the detected geometric feature close to the real situation. Subsequently, a transformation error correction method with the strong geometric constraint of a standard multi-target reference calibrator is developed, which introduces the observed error to the calibration matrix updating model. Finally, the effectiveness of the proposed method is validated by a series of experiments. The results show that the distance error is reduced to 0.080 mm from 0.192 mm compared with the traditional calibration method. Moreover, the measurement accuracy of local reference points with updated calibration results from the field is superior to 0.056 mm.

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A binocular stereo visual servo system for bird repellent in substations

Zhou

et al. 2023

Multimed Tools Appl

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Long-Range Binocular Vision Target Geolocation Using Handheld Electronic Devices in Outdoor Environment

Cited by 18 publications

References 41 publications

WLTOG: An optimization approach for wild large‐range target omnidirectional geolocation based on monocular PTZ camera

WLTOG: An optimization approach for wild large‐range target omnidirectional geolocation based on monocular PTZ camera

Improved Calibration of Eye-in-Hand Robotic Vision System Based on Binocular Sensor

A binocular stereo visual servo system for bird repellent in substations

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