Historical Document Image Denoising by Ising Model

In this paper, we propose a historical document image denoising method based on Ising-like model and Anisotropic filter. Physical statistics and morphological smooth process are combined together to improve image particulars. We first apply an Ising model to the 8-th bit plane of the original historical document image, then the image energy field and density is through Ising dynamic evolution. After the image is processed, it has been smoothed by Anisotropic morphological for several times. At last, we get the restored image document. We compare the visual quality changes before and after Ising evolution in different Anisotropic morphological condition respectively. Experimental results demonstrate that the Ising evolved image can better restore the local area details of the degraded historical document image.