Improvements of Computational Ghost Imaging by Using Sequenced Speckle

Abstract

This study presents a computational ghost imaging (GI) scheme that utilizes sequenced random speckle pattern illumination. The primary objective is to develop a speckle pattern/sequence that improves computational time without compromising image quality. To achieve this, we modulate the sequence of speckle sizes and design experiments based on three sequence rules for ordering the random speckle patterns. Through theoretical analysis and experimental validation, we demonstrate that our proposed scheme achieves a significantly better contrast-to-noise rate (CNR) compared to traditional GI at a similar resolution. Notably, the sequential GI method outperforms conventional approaches by providing over 10 times faster computational speed in certain speckle composition groups. Furthermore, we identify the corresponding speckle sizes that yield superior image quality, which are found to be geometrically proportional to the reference object area. This innovative approach utilizing sequenced random speckle patterns demonstrates potential suitability for imaging objects with complex or unknown shapes. The findings of this study hold great promise for advancing the field of computational GI and pseudo-thermal GI, addressing the need for improved computational efficiency while maintaining high-quality imaging.

Spatially Multiplexed Speckle on 1D Sensors for High-Speed 2D Sensing Applications

“…Various applications of this approach have been documented across fields such as medicine, biology, industry, and food quality assessment [ 4 , 5 , 6 , 7 , 8 , 9 ]. Sometimes, speckle imaging is also associated with ghost imaging [ 10 ].…”

Cutting-Edge Advances in Image Information Processing

“…Computational ghost imaging is a technique that involves creating an image of an object by shining a series of random binary patterns on it and using a single-pixel detector. A new method for computational ghost imaging that uses sequenced random speckle patterns as the light source is proposed in [5]. Speckle patterns are patterns of bright and dark spots produced by laser light scattering from a rough surface.…”