Optimized Iterative Algorithm to Generate Computer-Generated Holograms Based on the Intermediate Angular-Spectrum Method

Pi, Dapu; Liu, Juan; Wang, Yongtian

doi:10.1109/jphot.2022.3162632

Cited by 7 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared with 2D information, three-dimensional (3D) information can accurately record the depth, location, and spatial relationship of information, which has greater capacity and richer information and shows more apparent advantages in terms of storage capacity, transmission, and display [10]. Consequently, encryption of 3D information has emerged as a critical area of research, including diffraction imaging [11], integral imaging [12,13], digital holography [14,15], and computer-generated hologram (CGH) [16,17]. Among them, CGH has the advantages of flexible operation, easy storage, and simple reconstruction in virtual and realistic 3D objects and has attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

Ji,

Xi,

et al. 2024

Laser Phys. Lett.

View full text Add to dashboard Cite

A method is proposed to enhance the security of three-dimensional (3D) objects through computer-generated hologram (CGH) encryption and hiding. The process begins by encoding the 3D object using an iterative angular-spectrum layer-oriented method to create an optimized phase-only CGH. Next, the encrypted image is produced by modulating the phase-only CGH with a chaotic random phase mask (CRPM) generated through Henon mapping. Subsequently, a combination of discrete wavelet transform (DWT) and singular value decomposition (SVD) is utilized to embed the encrypted data into a visually secure image, ensuring the encryption and concealment of 3D objects. During decryption, the accurate decryption procedure and keys must be applied to achieve the final reconstruction. The utilization of CGH in conjunction with CRPM effectively enhances the security of 3D objects, while the integration of DWT and SVD ensures the visual security properties of the encrypted data, providing a dual layer of protection for 3D objects. Experimental simulation results demonstrate that this approach achieves high-security encryption and concealment of 3D objects, ensuring high-quality decryption of 3D objects during the reconstruction process.

show abstract

Section: Introductionmentioning

confidence: 99%

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

Ji,

Xi,

et al. 2024

Laser Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…In order to accelerate the convergence speed of iterations, many researchers have begun to optimize the GS algorithm and proposed some iterative algorithms. These algorithms mainly improve image quality by introducing a certain degree of freedom to the amplitude of the image plane during iteration rather than strict constraints [3][4][5][6] . The main idea is to divide the image plane into signal and noise regions and apply different constraint strategies.…”

Section: Introductionmentioning

confidence: 99%

Iterative phase hologram generation with adaptive weighted constraints for color holographic display

Ding,

Wang,

Wang

et al. 2023

Holography, Diffractive Optics, and Applications XIII

View full text Add to dashboard Cite

Compared with monochromatic holographic displays, color holographic displays have rich depth and color information, which can give observers a more pleasant visual effect. Inspiring by the adaptive weighted GS method, we introduced an optimized iterative method based on exponential weighted constraint to calculate phase-only holograms of color images. After channel separation of the target image to obtain each component image, the input complex amplitude is formed with quadratic phase and iterated. During the iteration, subtract the amplitude of the reconstructed image from the amplitude of the target image to construct an exponential constraint. This exponential constraint is applied to the signal area of the image plane. After calculating the three-channel phase hologram, a color holographic reconstruction can be obtained using the time multiplexing method. Simulated and optical experiments verify the effectiveness of this method.

show abstract

“…As the number of 3D objects increases, the speckle noise becomes more pronounced. Existing iterative methods do not adequately address this issue [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Multiplane Holographic Imaging Using the Spatial Light Modulator

Zhai,

Li,

et al. 2023

Photonics

View full text Add to dashboard Cite

The optimization of imaging accuracy and speed is a crucial issue in the development of computer-generated holograms (CGH) for three-dimensional (3D) displays. This paper proposes an optimized iterative algorithm based on the angular spectrum method (ASM) to achieve high-quality holographic imaging across multiple planes. To effectively utilize spatial resources for multi-image reconstruction and mitigate the speckle noise caused by the overlapping of target images, constraint factors are introduced between different layers within the same region. The seeking rule of the constraint factor is also analyzed. By utilizing both constraint factors and variable factors, the presented method is able to calculate phase holograms for target figure imaging at four different planes. Simulation and experimental results demonstrate that the proposed method effectively improves the overall quality of the different planes, thus holding great potential for wide-ranging applications in the field of holography.

show abstract

Optimized Iterative Algorithm to Generate Computer-Generated Holograms Based on the Intermediate Angular-Spectrum Method

Cited by 7 publications

References 25 publications

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

An encrypted hiding scheme for 3D objects based on CGH and Henon mapping

Iterative phase hologram generation with adaptive weighted constraints for color holographic display

Multiplane Holographic Imaging Using the Spatial Light Modulator

Contact Info

Product

Resources

About