The performance of the imaging system under low light intensity will be affected by shot noise, and the shot noise will become stronger as the power of the light source decreases. Aiming at the impact of shot noise, this paper applies the principle of deep learning to low-light image enhancement. To improve the generalization ability of deep neural networks in different scenarios, a block matching solution based on BM3D is proposed to optimize the data of the Retinex network model. In the training process of the network, the consistency of the reflection component and the smoothness of the illumination component of the low-light image and the normallight image are used to constrain, without the need for real data of the reflection component and the illumination component. Experimental results show that this method can obtain a satisfactory low-light enhancement effect, and can significantly improve the reconstruction results of low-light images affected by noise.
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