In order to optimize the low-light image enhancement effect ,a non-reference low-light image enhance- ment method based on visual communication is proposed. The proposed method reconstructs the low - light image through panoramic imaging technology ,uses computer principles to simulate the optical imaging system ,and introduces multifractal method and semi-soft threshold exponential attenuation method to remove the noise on the reconstructed image. The best transmittance in the process of image enhancement is calculated by the light and dark dual-channel coefficient ,and the low-light image is enhanced by this transmittance. The experimental results show that the recon- structed image is complete ,the overall quality of the image is high ,and the SIMM value is close to 1. The image de- noising is achieved without affecting the image definition. The enhancement effect on the low-light image is obvious ,avoiding the image exposure during the enhancement process ,and achieving the complete retention of image details.