Portable and low-cost hologram verification module using a snapshot-based hyperspectral imaging algorithm

ABSTRACT: One of the challenges in differentiating a duplicate hologram from an original one is reflectivity. A slight change in lighting condition will completely change the reflection pattern exhibited by a hologram, and consequently, a standardized duplicate hologram detector has not yet been created. In this study, a portable and low-cost snapshot hyperspectral imaging (HSI) algorithm-based housing module for differentiating between original and duplicate holograms was proposed. The module consisted of a Raspberry Pi 4 processor, a Raspberry Pi camera, a display, and a light-emitting diode lighting system with a dimmer. A visible HSI algorithm that could convert an RGB image captured by the Raspberry Pi camera into a hyperspectral image was established. A specific region of interest was selected

SUBMITTER: Mukundan A 

PROVIDER: S-EPMC9630442 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature