Chroma-Key Algorithm Based on Combination of K-Means and Confident Coefficients
Nguyen Ngoc Tai · International Journal of Information and Electronics Engineering · 2014
Abstract—Chroma-key is an application which is used many in video industries, TV programs. In this paper, we present an efficient algorithm for Chroma-key and its FPGA implementation. In the proposed method, we firstly employ K-means to segment input frames in to a trimap including background, foreground, and unknown regions. In the next stage, we utilize comparison of confident neighborhood pixels to refine unknown region to separate background and foreground regions. In order to apply the proposed algorithm for real-time chroma-key effect, we implement its VLSI architecture on Bitec Cyclone III development board. Our design is able to perform Chroma-key process with pleasing quality HD video in real-time.