Control Loop of Image Correction based on Detection and Self-Healing of Defective Pixels

Abstract

This paper presents the construction of a control loop for the concealment of defective pixels in an image or an image sensor. The proposed control loop is based on defective pixel detection methods, and the concealment of the detected defective pixels. Two detection algorithms have been used in the process. The first is based on distance and the second on the evaluation and analysis of local dispersion parameters of the pixel blocks in the input image. The concealment process uses the median filter. The proposed control loop takes as input an image and a defective pixel number threshold into an image, and outputs the final corrected image, after passing through defective pixel detection and correction phases if necessary.