Fig. 1. Spectral imaging model. (a) Schematic of principle; (b) schematic of network

Fig. 2. Simulation of light modulation by filter and camera based on LN layer

Fig. 3. Imaging principle of PS Kappa DX4 hyperspectral camera

Fig. 4. Comparison of the spectral reconstruction performance of the optimized model with two structural filter schemes. (a) RGB image, tf MRAE and nl MRAE images, tf MRAE hist and nl MRAE hist images; (b) reconstructed irradiance of some pixels in sample No. 3

Fig. 5. Comparison of the optimized filter's spectral response function. (a) Thin film interference filter scheme; (b) no-limited structure filter scheme

Fig. 6. Impact of various array sizes on the spectral imaging performance of no-limited structure filters. (a) RGB image, tf MRAE and nl MRAE images, tf MRAE hist and nl MRAE hist images; (b) reconstructed irradiance of some pixels in sample No. 3