TY - JOUR AU - Macêdo, Samuel AU - Melo, Givânio AU - Kelner, Judith PY - 2015/12/01 Y2 - 2024/03/28 TI - A comparative study of grayscale conversion techniques applied to SIFT descriptors JF - Journal on Interactive Systems JA - JIS VL - 6 IS - 2 SE - Special Issue - SVR 2015 DO - 10.5753/jis.2015.662 UR - https://sol.sbc.org.br/journals/index.php/jis/article/view/662 SP - AB - <p>In computer vision, gradient-based tracking is usually performed from monochromatic inputs. However, a few research studies consider the influence of the chosen color-tograyscale conversion technique. This paper evaluates the impact of these conversion algorithms on tracking and homography calculation results, both being fundamental steps of augmented reality applications. Eighteen color-to-greyscale algorithms were investigated. These observations allowed the authors to conclude that the methods can cause significant discrepancies in the overall performance. As a related finding, experiments also showed that pure color channels (R, G, B) yielded more stability and precision when compared to other approaches.</p> ER -