Photoacoustic computational ghost imaging

Torke, Paul R.; Nuster, Robert; Paltauf, Guenther

doi:10.1364/ol.452229

Cited by 5 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondly, single-pixel imaging may use exotic detectors whose 2D format with high specialization are impractical to manufacture. For instance, employing an ultrasonic transducer as detector, SPI has been used for photoacoustic imaging 66 , 67 . SPI paired with the photomultiplier tube has found applications in single-photon imaging 68 , for time-of-flight 3D imaging 69 , 70 , and imaging objects hidden from direct linefa-of-sight 71 .…”

Section: Discussionmentioning

confidence: 99%

A compressive hyperspectral video imaging system using a single-pixel detector

Xu,

Lu,

Saragadam

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Capturing fine spatial, spectral, and temporal information of the scene is highly desirable in many applications. However, recording data of such high dimensionality requires significant transmission bandwidth. Current computational imaging methods can partially address this challenge but are still limited in reducing input data throughput. In this paper, we report a video-rate hyperspectral imager based on a single-pixel photodetector which can achieve high-throughput hyperspectral video recording at a low bandwidth. We leverage the insight that 4-dimensional (4D) hyperspectral videos are considerably more compressible than 2D grayscale images. We propose a joint spatial-spectral capturing scheme encoding the scene into highly compressed measurements and obtaining temporal correlation at the same time. Furthermore, we propose a reconstruction method relying on a signal sparsity model in 4D space and a deep learning reconstruction approach greatly accelerating reconstruction. We demonstrate reconstruction of 128 × 128 hyperspectral images with 64 spectral bands at more than 4 frames per second offering a 900× data throughput compared to conventional imaging, which we believe is a first-of-its kind of a single-pixel-based hyperspectral imager.

show abstract

Section: Discussionmentioning

confidence: 99%

A compressive hyperspectral video imaging system using a single-pixel detector

Xu,

Lu,

Saragadam

et al. 2024

Nat Commun

View full text Add to dashboard Cite

show abstract

“…SPI combined with electrooptic detection has been used in terahertz (THz) imaging [7][8][9][10][11] . SPI implemented with ultrasonic transducers has found applications in photoacoustic imaging 12,13 .Recent years have witnessed the growing popularity of SPI owing to the hardware progress in spatial light modulators (SLMs) and software advances in image reconstruction. To date, the dominant SLM used in SPI is the digital micromirror device (DMD), which is capable of reconfigurable and nonmechanical display of mega-pixel patterns at refresh rates of up to 32 kHz 1 .…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Compressed ultrahigh-speed single-pixel imaging by swept aggregate patterns

2022

View full text Add to dashboard Cite

Single-pixel imaging (SPI) has emerged as a powerful technique that uses coded wide-field illumination with sampling by a single-point detector. Most SPI systems are limited by the refresh rates of digital micromirror devices (DMDs) and time-consuming iterations in compressed-sensing (CS)-based reconstruction. Recent efforts in overcoming the speed limit in SPI, such as the use of fast-moving mechanical masks, suffer from low reconfigurability and/or reduced accuracy. To address these challenges, we develop SPI accelerated via swept aggregate patterns (SPI-ASAP) that combines a DMD with laser scanning hardware to achieve pattern projection rates of up to 14.1 MHz and tunable frame sizes of up to 101×103 pixels. Meanwhile, leveraging the structural properties of S-cyclic matrices, a lightweight CS reconstruction algorithm, fully compatible with parallel computing, is developed for real-time video streaming at 100 frames per second (fps). SPI-ASAP allows reconfigurable imaging in both transmission and reflection modes, dynamic imaging under strong ambient light, and offline ultrahigh-speed imaging at speeds of up to 12,000 fps.

show abstract

Hadamard acoustic correlated imaging based on photoacoustic modulation with a single transducer

Liang,

Bai,

Jin

et al. 2024

AIP Advances

View full text Add to dashboard Cite

Conventional ultrasound technology based on spot scanning or phased array encounters significant challenge in real-time imaging with a single detector. In this paper, we present a Hadamard acoustic correlated imaging based on photoacoustic modulation with one transducer. The process of accurately generating the Hadamard acoustic field is to apply the carbon-nanotubes–polydimethylsiloxane composite to absorb the optimized Hadamard basis pattern. Taking advantage of correlated imaging, our system without scanning can reduce imaging artifacts and its resolution could be about four times higher than that of traditional ultrasound imaging. The use of a single transducer rather than an array of transducers can reduce the cost of the imaging system. Therefore, the proposed scheme can find applications in biomedical imaging and nondestructive evaluation.

show abstract

Photoacoustic computational ghost imaging

Cited by 5 publications

References 16 publications

A compressive hyperspectral video imaging system using a single-pixel detector

A compressive hyperspectral video imaging system using a single-pixel detector

Compressed ultrahigh-speed single-pixel imaging by swept aggregate patterns

Hadamard acoustic correlated imaging based on photoacoustic modulation with a single transducer

Contact Info

Product

Resources

About