Motion estimation and quality enhancement for a single image in dynamic single-pixel imaging

Jiao, Shuming; Sun, Mingjie; Gao, Yang; Lei, Ting; Xie, Zhenwei; Yuan, Xiaocong

doi:10.1364/oe.27.012841

Cited by 62 publications

(19 citation statements)

References 30 publications

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“…It is difficult to perform the multi-hyperuniform optical sampling with an actual detector array, because such a chromatic detector array would be impossible to manufacture. However, it is possible to perform a multi-hyperuniform optical sampling experiment utilizing the computational imaging methods which have emerged during the last decade [30][31][32][33]. Single-pixel imaging, being a typical computational imaging method, forms an image by sampling the scene with varying structured illuminations, and associating the illumination patterns with the corresponding light intensities recorded with a single-pixel detector.…”

Section: Resultsmentioning

confidence: 99%

Bionic Birdlike Imaging Using a Multi-Hyperuniform LED Array

Zhao

Cao

et al. 2021

Sensors

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Digital cameras obtain color information of the scene using a chromatic filter, usually a Bayer filter, overlaid on a pixelated detector. However, the periodic arrangement of both the filter array and the detector array introduces frequency aliasing in sampling and color misregistration during demosaicking process which causes degradation of image quality. Inspired by the biological structure of the avian retinas, we developed a chromatic LED array which has a geometric arrangement of multi-hyperuniformity, which exhibits an irregularity on small-length scales but a quasi-uniformity on large scales, to suppress frequency aliasing and color misregistration in full color image retrieval. Experiments were performed with a single-pixel imaging system using the multi-hyperuniform chromatic LED array to provide structured illumination, and 208 fps frame rate was achieved at 32 × 32 pixel resolution. By comparing the experimental results with the images captured with a conventional digital camera, it has been demonstrated that the proposed imaging system forms images with less chromatic moiré patterns and color misregistration artifacts. The concept proposed verified here could provide insights for the design and the manufacturing of future bionic imaging sensors.

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Section: Resultsmentioning

confidence: 99%

Bionic Birdlike Imaging Using a Multi-Hyperuniform LED Array

Zhao

Cao

et al. 2021

Sensors

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“…In Ref. 25 , motion estimation was performed during the capture of a single frame, where the estimated motion of the object was incorporated into the reconstruction algorithm. While this approach performed well on both simulated and measured data, it suffers from several limitations.…”

Section: Single-pixel Imaging Of Dynamic Objects Using Multi-frame Motion Estimation Sagi Monin Evgeny Hahamovich and Amir Rosenthal *mentioning

confidence: 99%

“…In contrast to Ref. 25 , we perform motion estimation between subsequent frames, rather than within the same frame, leading to significant reduction in complexity. While our algorithm may be applied to any type of trajectory, it assumes that within a single frame the motion is approximately linear.…”

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Single-pixel imaging of dynamic objects using multi-frame motion estimation

Monin¹,

Hahamovich²,

Rosenthal³

2021

Sci Rep

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Single-pixel imaging (SPI) enables the visualization of objects with a single detector by using a sequence of spatially modulated illumination patterns. For natural images, the number of illumination patterns may be smaller than the number of pixels when compressed-sensing algorithms are used. Nonetheless, the sequential nature of the SPI measurement requires that the object remains static until the signals from all the required patterns have been collected. In this paper, we present a new approach to SPI that enables imaging scenarios in which the imaged object, or parts thereof, moves within the imaging plane during data acquisition. Our algorithms estimate the motion direction from inter-frame cross-correlations and incorporate it in the reconstruction model. Moreover, when the illumination pattern is cyclic, the motion may be estimated directly from the raw data, further increasing the numerical efficiency of the algorithm. A demonstration of our approach is presented for both numerically simulated and measured data.

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“…However, the optical setup has certain experimental complexity such as precise alignment requirement of optical elements, fabrication difficulty of HOE and availability of laser source. Different from the coherent imaging system [11,12], an incoherent optical system such as a single-pixel imaging (SPI) system [16][17][18][19][20][21] will have significantly lower experimental complexity. In fact, this has been revealed in some previous works about optical computing [22] and holography [23].…”

Section: Introductionmentioning

confidence: 99%

Visual cryptography in single-pixel imaging

Jiao¹,

Feng²,

Gao³

et al. 2020

Opt. Express

Self Cite

117

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Two novel visual cryptography (VC) schemes are proposed by combining VC with single-pixel imaging (SPI) for the first time. It is pointed out that the overlapping of visual key images in VC is similar to the superposition of pixel intensities by a single-pixel detector in SPI. In the first scheme, QR-code VC is designed by using opaque sheets instead of transparent sheets. The secret image can be recovered when identical illumination patterns are projected onto multiple visual key images and a single detector is used to record the total light intensities. In the second scheme, the secret image is shared by multiple illumination pattern sequences and it can be recovered when the visual key patterns are projected onto identical items. The application of VC can be extended to more diversified scenarios by our proposed schemes.

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Motion estimation and quality enhancement for a single image in dynamic single-pixel imaging

Cited by 62 publications

References 30 publications

Bionic Birdlike Imaging Using a Multi-Hyperuniform LED Array

Bionic Birdlike Imaging Using a Multi-Hyperuniform LED Array

Single-pixel imaging of dynamic objects using multi-frame motion estimation

Visual cryptography in single-pixel imaging

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