3D laser gated viewing from a moving submarine platform

Christnacher, Frank; Laurenzis, Martin; Monnin, David; Schmitt, G.; Metzger, Nicolas; Schertzer, Stéphane; Scholtz, T.

doi:10.1117/12.2066817

Cited by 10 publications

(4 citation statements)

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“…Typical underwater range-gated imaging systems and their imaging results in recent years are shown in Fig. 5 [31,32]. In 2014, Christnacher et al [32] developed SeaLVi4 system, which employs a 21 kHz repetition frequency and 2 ns pulse width laser at 532 nm with 170 mW of power to illuminate a FOV of 17°×13°.…”

Section: Figure 5 Four Range-gated Imaging Systems and Their Images [31 32]mentioning

confidence: 99%

“…5 [31,32]. In 2014, Christnacher et al [32] developed SeaLVi4 system, which employs a 21 kHz repetition frequency and 2 ns pulse width laser at 532 nm with 170 mW of power to illuminate a FOV of 17°×13°. The system was tested in Baltic Sea [33] with an attenuation coefficient of 0.5 m -1 .…”

Section: Figure 5 Four Range-gated Imaging Systems and Their Images [31 32]mentioning

confidence: 99%

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Underwater Optical Imaging: Key Technologies and Applications Review

et al. 2021

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The challenges associated with acquiring the clear images of objects in underwater environment are difficult to overcome due to the absorptive and scattering nature of seawater. Recently, the research community has focused on mitigating these effects. The recent developments in image enhancement algorithms and strategies of signal light enhancement have brought improvement in some application areas. In this work, we review the six most common methods based on signal light enhancement. We present the individual working mechanisms, latest representative advances, and suitable application conditions. Moreover, we also present a detailed comparison of these techniques. In each technique, we present their applicable environments and conditions according to the following indicators: operating distance (from 2 attenuation lengths (AL) to 13.5 AL), resolution (from centimeter to millimeter), and field of view (FOV). By summarizing and analyzing the existing problems that restrict the underwater optical imaging techniques, the future development trends are prospected. INDEX TERMSUnderwater optical imaging, Underwater imaging model, Signal light enhancement, Optical properties of seawater

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Section: Figure 5 Four Range-gated Imaging Systems and Their Images [31 32]mentioning

confidence: 99%

Section: Figure 5 Four Range-gated Imaging Systems and Their Images [31 32]mentioning

confidence: 99%

Underwater Optical Imaging: Key Technologies and Applications Review

et al. 2021

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“…As discussed in the literature [21], all the images produced are processed and used to reconstruct a virtual 3D model of the scene. Thus, the precision of the 3D model depends on the light slice thickness and on the value of the step used to scan the scene.…”

Section: D Range Imagingmentioning

confidence: 99%

“…In this example, the reconstructed field sampled by 200 images has a depth of about 1 km. Figure 14 shows two more results of 3D reconstruction [21]. By adapting the pulse width, this method can digitize either a kilometric scene or a centimetric scene.…”

Section: D Range Imagingmentioning

confidence: 99%

Sixty years of advanced imaging at the French-German Research Institute of Saint-Louis: from the Cranz-Schardin camera to computational optics

Christnacher

Laurenzis

Lutz

et al. 2019

Advanced Optical Technologies

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In 2019, the French-German Research Institute of Saint-Louis (ISL) is celebrating its 60th anniversary. Since the beginning, advanced imaging technologies were one of the institute’s flagship areas of research and, from the Cranz-Schardin camera to computational optics, ISL never stopped innovating. Each technological innovation is a testimony to its time, and the research works in visionics make no exception to this rule. Each decade was marked by innovations that made it possible to develop means of vision or visualization, which ensure that our institute remains at the forefront of the research in this field. High-speed cameras, holography, lasers, or active imaging systems developed at ISL are examples of this. The science of photon, photonics, still has a bright future ahead, and there is no doubt that the latest discoveries and technological advances in this field will be applied to systems that will allow our armed forces to maintain their technological superiority and our soldiers to carry out their missions with greater security.

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