In this letter, compressive temporal ghost imaging with chaotic laser is applied to optical encryption good time-controllable random characteristics and a second-order time correlation property. The security, feasibility, applicability of our method are verified on the basis research mechanism. experiment suggests can obtain high-quality recovery signal, resist noise attack, apply different kinds signals. This technique be immediately telecommunication advantages high wide applicability,...

In this paper, we propose a method of physically-secured high-fidelity free-space optical data transmission through scattering media using physically- and dynamically-generated scaling factors. Optical channel characteristics are explored, factors physically dynamically generated to serve as security keys in the developed system. The dynamic provide layer for transmission. To best our knowledge, it is first time generate system realize encryption. existing controlled by two devices, i.e.,...

In this Letter, we propose a physically enhanced ghost encoding scheme that is realized by exploring optical channel characteristics, i.e., and dynamically generated scaling factors. It found factors can be to serve as security keys in scheme, dramatically enlarging the key space enhancing of schemes. To best our knowledge, first time dynamic have been controlled path realize encoding. addition illumination patterns used schemes, proposed method applies variable beam attenuator an...

Free-space optical data transmission through non-static scattering media, e.g., dynamic and turbid water, is challenging. In this paper, we propose a new method to realize high-fidelity high-robustness free-space highly water using series of scaling factors correct light intensities recorded by single-pixel bucket detector. A fixed reference pattern utilized obtain the during in free space. To verify proposed method, different turbidity levels, strengths water-flow-induced turbulence laser...

We propose a new approach for high-fidelity free-space optical data transmission through dynamic smoke using series of 2D arrays random numbers as information carriers. Data to be transmitted in environment is first encoded into numbers. Then, the generated and fixed reference pattern are alternately embedded amplitude-only spatial light modulator, illuminated propagate free space. Real-time thickness (OT) calculated describe temporal change properties wave environment, noise errors caused...

In this paper, a new and robust method is proposed to realize high-fidelity non-line-of-sight (NLOS) optical information transmission through turbid water around corner. A series of 2D random amplitude-only patterns are generated by using the zero-frequency modulation method, which used as carriers. The laser beam modulated propagates water, wave diffused further reflected single-pixel detector collect light intensity at receiving end. To demonstrate feasibility effectiveness NLOS free-space...

Visual cryptography (VC) is developed to be a promising approach encoding secret information using pixel expansion rules. The useful can directly rendered based on human vision without the usage of decryption algorithms. However, many VC schemes cannot withstand occlusion attacks. In this paper, new scheme proposed binary amplitude-only holograms (AOHs) generated by modified Gerchberg-Saxton algorithm (MGSA). During encryption, image divided into group unrecognizable and mutually-unrelated...

An optical encryption method based on compressive ghost imaging (CGI) with double random-phase encoding (DRPE), named DRPE-CGI, is proposed. The information first encrypted by the sender DRPE, DRPE-coded image system of computational a secret key. key N vectors generated and will be shared receiver who authorized user. decrypts key, aid CGI sensing technique, then reconstructs original technique DRPE-decoding. experiments suggest that cryptanalysts cannot get any useful about even if they...

In the process of spectral reflectance reconstruction, sample selection plays an important role in accuracy constructed model and reconstruction effects. this paper, a method for training based on camera response is proposed. It has been proved that value close correlation with reflectance. Consequently, paper we adopt technique drawing sphere space to select samples which have higher test samples. addition, Wiener estimation used reconstruct Finally, find smallest color difference root mean...

In this paper, we propose a new, to the best of our knowledge, and robust method optically transmit analog signals in free space through turbid water. proposed method, each pixel original signal is sequentially encoded into random amplitude-only patterns as information carrier. A single-pixel detector utilized collect light intensity at receiving end. To verify feasibility effectiveness number optical experiments are carried out different kinds water conditions, e.g., clean water, mixed with...

By studying the traditional spectral reflectance reconstruction method, and relative power distribution of a lighting source are sparsely decomposed, orthogonal property principal component basis is used to eliminate basis; then data obtained by solving sparse coefficient. After theoretical analysis, based on prior knowledge single-pixel detector carried out software simulation experiment. It can reduce complexity cost system, has certain significance for improvement multispectral image...

In order to improve the reconstruction accuracy and reduce workload, algorithm of compressive sensing based on iterative threshold is combined with method adaptive selection training sample, a new put forward. The three kinds sample are used reconstruct spectral reflectance testing algorithm, color difference error compared. experiment results show that precision better than sensing.

A new approach to realizing physically-secured ghost diffraction and transmission is proposed in this letter.A series of random 2D arrays numbers are used as optical information carriers transmit original data, e.g., analog signals or images ghosts.Computer-generated magnification factors applied for data encoding, physically-generated scaling generated with absorptive filters free-space transmission.The computer-generated serves security keys, explored realize high-fidelity high-security...

Optics has provided a promising means for the development of information hiding in recent years. However, conventional optical systems can only hide limited number images, and implementation complexity is usually high methods. In this paper, we propose new scheme to implement based on single-input multiple-output (SIMO) binary amplitude-only holograms (AOHs) using modified Gerchberg-Saxton algorithm (MGSA). Different from methods with multiplexing capacity, proposed retrieve large different...

Computational ghost imaging is a good optical encryption method, but it can have difficulty large-sized object and be time consuming. To solve the problem, we propose novel method based on block adaptive compressive sensing with computational imaging. In this model, divide image into several blocks. Then, each considered as single while performing Each has its own sampling ratio according to human visual system. recovery process, use algorithm reconstruct image. Compared imaging, quality of...

In this article, the algorithm of compressing sensing is used to improve imaging resolution and realize ghost via compressive for a phase object based on theoretical analysis lensless Fourier phase-shifting digital holography. The holography uses bucket detector measure total light intensity interference four-step method obtain differential light. experimental platform built software simulation, results show that can high-resolution distribution figure object. With same sampling times,...

Accurate data transmission is important in biological applications and biomedical devices. Realizing high-fidelity optical wireless with a large penetration depth desirable. Here, sequence of amplitude-only patterns at the transmitter considered as information carrier to encode transmitted data. The total light intensity receiving end collected recorded by bucket detector. We verify feasibility effectiveness proposed approach different thicknesses sample. experimental results demonstrate our...

Ghost imaging offers great potential, with respect to standard imaging, for objects in optically harsh or noisy environments. It can solve the problems that are difficult by conventional techniques. Recently, it has become a hot topic quantum optics. In this paper, we propose scheme ghost based on rosette scanning, named imaging. Sampling small area sampling instead of whole object, instantaneous field view scanning is used as modulation light This reduces energy loss, number samples, and...