Comparative Analysis of Eigenvalues-Based and Tchebichef Moments-Based Focus Measures

This paper provides a comparative analysis between the eigenvalues-based and Tchebichef moments-based image focus measures. The performance of these two image focus measures is compared using several images of known and unknown distortion conditions and the experimental results show the robustness and feasibility of the eigenvalues in providing relative image focus measure if compared to Tchebichef moments. In particular, the eigenvalues-based focus measure provides wider working range and more precise prediction consistency under all tested distortion conditions.