Abstract: To fully exploit the inherent correlation between light field epipolar plane images（EPI） and strengthen the effective capture of spatial information, this study proposed a dense light field decoupling reconstruction method based on multiscale EPI information fusion. This method utilized the spatial and epipolar plane dimensions to enable a better capture of the angular correlations between subaperture views. By decoupling and fusing multiple types of information, the accuracy and effectiveness of light field reconstruction could be enhanced. First, based on four-dimensional light field data, additional dense spatial dimensions were introduced to improve the generalization capability of the network and enhanced its understanding of local structures and texture details in images. Second, to better complement and enhance the mutual information among epipolar planes, an epipolar plane fusion module was designed along with a novel multiscale convolutional attention mechanism to integrate feature information. This attention mechanism effectively captured angular correlations through multiscale feature extraction and a global attention mechanism, thereby enhancing the expression of critical features while suppressing redundant content. Finally, experiments conducted on light field datasets, such as HCInew, HCIold,and Stanford, demonstrated that the proposed method outperformed existing state-of-theart（SOTA） approaches in terms of evaluation metrics including the peak signal-to-noise ratio（PSNR） and structural similarity（SSIM）. The proposed method achieved superior reconstruction performance in most test scenarios.

Key words: light field, light field decoupling, dense feature extraction, epipolar plane images（EPI） fusion, angular super-resolution