Endoscopic Application of a Compact Compound-Eye Camera

Kagawa, Keiichiro; Kawahito, Shoji

doi:10.7454/mst.v18i3.431

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Beam splitters were used since the 1950s in television cameras [24], which divide light beams into different fractions similar to prisms. Interferometer based techniques [36], filtered lenslet arrays [37], division of focal plane polarimeters [38], spectrometers [39], multi-view multi-spectral mirror systems [40], and tunable sensors [41] can be named, too. These methods are tied to specify problems and are used in few industrial and professional applications.…”

Section: Related Multi-spectral Imaging Techniquesmentioning

confidence: 99%

Camera Array for Multi-Spectral Imaging

Genser

Seiler

Kaup

2020

IEEE Trans. on Image Process.

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Recently, many new applications arose for multispectral and hyper-spectral imaging. Besides modern biometric systems for identity verification, also agricultural and medical applications came up, which measure the health condition of plants and humans. Despite the growing demand, the acquisition of multi-spectral data is up to the present complicated. Often, expensive, inflexible, or low resolution acquisition setups are only obtainable for specific professional applications. To overcome these limitations, a novel camera array for multi-spectral imaging is presented in this article for generating consistent multispectral videos. As differing spectral images are acquired at various viewpoints, a geometrically constrained multi-camera sensor layout is introduced, which enables the formulation of novel registration and reconstruction algorithms to globally set up robust models. On average, the novel acquisition approach achieves a gain of 2.5 dB PSNR compared to recently published multi-spectral filter array imaging systems. At the same time, the proposed acquisition system ensures not only a superior spatial, but also a high spectral, and temporal resolution, while filters are flexibly exchangeable by the user depending on the application. Moreover, depth information is generated, so that 3D imaging applications, e.g., for augmented or virtual reality, become possible. The proposed camera array for multi-spectral imaging can be set up using off-the-shelf hardware, which allows for a compact design and employment in, e.g., mobile devices or drones, while being cost-effective.

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Section: Related Multi-spectral Imaging Techniquesmentioning

confidence: 99%

Camera Array for Multi-Spectral Imaging

Genser

Seiler

Kaup

2020

IEEE Trans. on Image Process.

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“…Optical beam scanning methods are also promising to increase the FoV of the endoscopic imaging systems [ 16 , 17 ]. Kagawa et al showed the possibility to increase the FoV of endoscopes by using a compact compound-eye camera [ 18 ]. Although these approaches offer advantages in terms of image resolution and aberrations, complicated optical and electronic-mechanical designs of the components lessen their durability and stability.…”

Section: Introductionmentioning

confidence: 99%

Large-Field-of-View Visualization Utilizing Multiple Miniaturized Cameras for Laparoscopic Surgery

et al. 2018

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The quality and the extent of intra-abdominal visualization are critical to a laparoscopic procedure. Currently, a single laparoscope is inserted into one of the laparoscopic ports to provide intra-abdominal visualization. The extent of this field of view (FoV) is rather restricted and may limit efficiency and the range of operations. Here we report a trocar-camera assembly (TCA) that promises a large FoV, and improved efficiency and range of operations. A video stitching program processes video data from multiple miniature cameras and combines these videos in real-time. This stitched video is then displayed on an operating monitor with a much larger FoV than that of a single camera. In addition, we successfully performed a standard and a modified bean drop task, without any distortion, in a simulator box by using the TCA and taking advantage of its FoV which is larger than that of the current laparoscopic cameras. We successfully demonstrated its improved efficiency and range of operations. The TCA frees up a surgical port and potentially eliminates the need of physical maneuvering of the laparoscopic camera, operated by an assistant.

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Endoscopic Application of a Compact Compound-Eye Camera

Cited by 2 publications

References 5 publications

Camera Array for Multi-Spectral Imaging

Camera Array for Multi-Spectral Imaging

Large-Field-of-View Visualization Utilizing Multiple Miniaturized Cameras for Laparoscopic Surgery

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