Single‐Pixel Multispectral Imaging With Customized Pixelated Spectral Mask Plate

ABSTRACT Single‐pixel imaging (SPI) has emerged as a cutting‐edge computational technique, offering distinct advantages over conventional methods, particularly in non‐visible wavelengths. This study introduces a compact and low‐cost single‐pixel multispectral imaging (SP‐MSI) system that utilizes a customized pixelated spectral mask plate (PSMP) for efficient spectral modulation. By employing pre‐calibrated multispectral patterns, our method enables the reconstruction of a 3D datacube (x, y, λ) at sampling ratios below 30%. This is achieved through a custom‐designed deep unfolding network (DUN) for image reconstruction. We validate the performance of our system through comprehensive theoretical analysis and experimental demonstrations across eight spectral bands. The proposed approach presents a promising solution for developing efficient and compact multispectral and hyperspectral imaging systems, compatible with both single‐pixel detectors and conventional 2D sensors.