A novel volumetric information fusion based on joint weighted evaluation and stationary wavelet transform is proposed. Threedimensional stationary wavelet transform was performed on multi‐focus data to obtain wavelet coefficients. Differential evolution based on joint weighted evaluation was then employed to optimize the block size of division. Corresponding sub‐coefficients of multi‐focus data were fused with the proposed fusion rule. Finally, large volumetric and high‐resolution photoacoustic imaging can be achieved by applying the inverse stationary wavelet transform.Further details can be found in the article by Xianlin Song, Sihang Li, Zhuangzhuang Wang, and| Xiongjun Cao (e202200234) image