Optical testing of panoramic lenses

Poulin-Girard, Anne-Sophie; Thibault, Simon

doi:10.1117/1.oe.51.5.053603

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…The design and distortion control of modern panoramic systems are analyzed and discussed in [60]. The optical testing of modern panoramic lenses on the market for safety and monitoring applications is reported for the first time in [61]. The first test is on the measurement of image mapping, especially on the reciprocal of IFoV expressed in pixels/degrees.…”

Section: Panomorph Imaging Systemmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

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With the rapid development of high-speed communication and artificial intelligence technologies, human perception of real-world scenes is no longer limited to the use of small Field of View (FoV) and low-dimensional scene detection devices. Panoramic imaging emerges as the next generation of innovative intelligent instruments for environmental perception and measurement. However, while satisfying the need for large-FoV photographic imaging, panoramic imaging instruments are expected to have high resolution, no blind area, miniaturization, and multi-dimensional intelligent perception, and can be combined with artificial intelligence methods towards the next generation of intelligent instruments, enabling deeper understanding and more holistic perception of 360 • real-world surrounding environments. Fortunately, recent advances in freeform surfaces, thinplate optics, and metasurfaces provide innovative approaches to address human perception of the environment, offering promising ideas beyond conventional optical imaging. In this review, we begin with introducing the basic principles of panoramic imaging systems, and then describe the architectures, features, and functions of various panoramic imaging systems. Afterwards, we discuss in detail the broad application prospects and great design potential of freeform surfaces, thin-plate optics, and metasurfaces in panoramic imaging. We then provide a detailed analysis on how these techniques can help enhance the performance of panoramic imaging systems. We further offer a detailed analysis of applications of panoramic imaging in scene understanding for autonomous driving and robotics, spanning panoramic semantic image segmentation, panoramic depth estimation, panoramic visual localization, and so on. Finally, we cast a perspective on future potential and research directions for panoramic imaging instruments.

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Section: Panomorph Imaging Systemmentioning

confidence: 99%

Review on Panoramic Imaging and Its Applications in Scene Understanding

Gao¹,

Yang²,

Sheng³

et al. 2022

Preprint

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show abstract

“…One previous test system measured the widefield lens along angles in a single plane, using a cylindrical structure of 75 cm radius and about 20 cm tall. [1] [2] Another previous test system required space of at least 3m ´ 3m ´ 2m [3] .…”

Section: Introductionmentioning

confidence: 99%

Compact MTF measurement of a fisheye lens

Sun,

Hagen,

Kuwano

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

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In this study, we present a novel approach for the measurement of modulation transfer function (MTF) of fisheye lenses. Fisheye lenses are known for their extreme wide-angle views, and pose unique challenges for MTF testing due to their complex optical properties, and the need for a large space for testing. The objective of this research is to devise a compact testing setup that enables MTF analysis of fisheye lenses within a compact controlled environment. To achieve this, we designed a setup using an adapter lens that reduces the required testing space from a full room to a compact 0.5m x 0.5m x 0.5m enclosure. We show an MTF analysis on one fisheye lens within this controlled environment.

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“…Due to their large field of view and their ability to acquire more information on the scene, fisheye lenses have been widely applied in security surveillance, panoramic image stitching, robot navigation, and small-sized intelligent systems [1][2][3]. In recent years, underwater vision systems have been widely used in fields including underwater resource exploration, target recognition, underwater navigation, obstacle avoidance, and environmental monitoring [4,5].…”

Section: Introductionmentioning

confidence: 99%

Calibration of underwater fisheye camera with multi-frequency heterodyne technique based on light field

Xie

Zhang

et al. 2020

Meas. Sci. Technol.

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In this paper, a novel approach is proposed to calibrate an underwater fisheye camera with the multi-frequency heterodyne technique based on the light field. First, an underwater fisheye camera imaging model based on the light field is established to demonstrate the multiple refractions of light in underwater propagation and the extraordinary imaging characteristics of the fisheye lens, which shows better conciseness and organization. Then, the calibration method applied in the underwater fisheye camera imaging system is proposed to determine the mapping of the light field and the pose of the underwater fisheye camera. The light field mapping of the fisheye lens is obtained with the assistance of the multi-frequency heterodyne technique. Finally, an underwater fisheye camera is developed and the experimental results are obtained to validate the correctness and feasibility of the proposed method. Our underwater imaging system proves capable of achieving higher accuracy in the context of underwater 3D measurement.

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Optical testing of panoramic lenses

Cited by 9 publications

References 8 publications

Review on Panoramic Imaging and Its Applications in Scene Understanding

Review on Panoramic Imaging and Its Applications in Scene Understanding

Compact MTF measurement of a fisheye lens

Calibration of underwater fisheye camera with multi-frequency heterodyne technique based on light field

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