3D compressive spectral integral imaging

Abstract

A novel compressive 3D imaging spectrometer based on the coded aperture snapshot spectral imager (CASSI) is proposed. By inserting a microlens array (MLA) into the CASSI system, one can capture spectral data of 3D objects in a single snapshot without requiring 3D scanning. The 3D spatio-spectral sensing phenomena is modelled by computational integral imaging in tandem with compressive coded aperture spectral imaging. A set of focal stack images is reconstructed from a single compressive measurement, and presented as images focused on different depth planes where the objects are located. The proposed optical system is demonstrated with simulations and experimental results.

Snapshot depth–spectral imaging based on image mapping and light field

“…The light field-based technique refers to the strategy that uses light field camera usually combined with coded aperture spectral imager or other snapshot spectral imaging approach to record the angular information of the monochromatic light rays to calculate the depth map of objects at different wavelengths, such as the compressive spectral light field imager proposed by Marquez et al [23], 3D compressive spectral integral imager proposed by Feng et al [24] and the compressed spectral light field imager proposed by Liu [25]. Combining the image mapping spectrometer (IMS) and light field, Cai et al proposed a hyperspectral light field imaging based on image mapping spectrometry by making the light field camera as the fore optics of IMS [26].…”

“…Since the raw data of this system is not the direct measurement of the scene, the traditional measurement method for SRF is not suitable for SDSIIL. After scanning the wavelength range to get the response at a certain (24)…”

Snapshot compressive spectral - depth imaging based on light field

“…The 3D spatial datacube is recovered by digital refocus and CS reconstruction algorithm. The typical representations include Compressive Spectral Light Field Imager (CSLFI) proposed by Marquez et al [21] and 3D compressive spectral integral imager (3D-CSII) proposed by Feng et al [22]. CSLFI records the light directions through microlenses array and reconstructs the spectral information of targets using the mixture spatial-spectral data obtained by coded color filters.…”

High Zoom Ratio Foveated Snapshot Hyperspectral Imaging for Fruit Pest Monitoring

“…Te disadvantages of these technologies include the need for a high-precision image slicer and the complexity of the subsequent optical path to ensure proper pupil processing and spectral decomposition. Based on the compressed sensing theory, compressed sensing snapshot spectral imaging technology [24,25] collects snapshots and performs spectral image restoration. However, the restoration process of this method is complex, and the key devices of the system have weak environmental adaptability.…”