An Application of Homogeneity Filter to Complete Image Details in 3D Images

Abstract

In order to complete details in the method of 3D range-gated imaging based on the range-intensity profiles (RIP), we apply homomorphic filtering to tomographic-like serial images in succession. This application filters noise disturbance from low laser illuminating homogeneity, atmospheric scattering and ambient background. First, tomographic-like serial images are filtered by EHPF, BHPF and GHPF, respectively, and three 3D images are reconstructed by RIP correlation algorithm at the same time. And then compare three 3D images under homomorphic filtering and 3D image reconstructed by raw tomographic-like serial images. At last, we analyze and evaluate gray levels in specific regions, which are extracted from tomographic-like serial images and 3D images, correspondingly. The experiments results show that homomorphic filtering is effective in noise elimination and improvement in completing details in 3D images.