ICGA Journal - Volume 44, issue 3

Authors: Cazenave, Tristan

Article Type: Editorial

DOI: 10.3233/ICG-230213

Citation: ICGA Journal, vol. 44, no. 3, pp. 71-71, 2022

Authors: Domazet, Ervin

Article Type: Research Article

Abstract: In this paper, we present a real-time scoring algorithm for steel dartboards, by using five (configurable) low-cost cameras that are positioned parallel to the baseline (surface) of the dartboard. In order to achieve that, firstly the cameras are placed at suggested places. Then, their central focus is configured to look at the center of the dartboard. Subsequently, the dartboard is calibrated and thresholds are adjusted for each camera respectively. After this step, the software runs and processes in real-time, detecting the darts with high precision as they are thrown. The algorithm is a daemon process, requiring high processing power. We …detect parts that require long processing times by profiling the algorithm. Using techniques of parallel-programming, important parts of the algorithm are adjusted to run in parallel, in order to achieve a real-time effect. In our experiments, our algorithm achieved a detection accuracy rate of 99.63%, by using five low-cost cameras having an 85 degree horizontal field of view (HFOV). Simultaneously, each throw is detected in less than 600 ms, giving the real-time effect to players. This algorithm is tested with a variety of professional steel dartboards, and dart arrows of different materials (tungsten, steel etc.). The obtained outcomes indicate the robustness of the proposed algorithm, producing promising results. Show more

Keywords: Steel tip dartboard, automatic scoring, hit detection, computer vision, image processing, real-time processing

DOI: 10.3233/ICG-230214

Citation: ICGA Journal, vol. 44, no. 3, pp. 72-90, 2022

Authors: Yamaguchi, Yoshiaki

Article Type: Research Article

Abstract: Cylinder-Infinite-Connect-Four is Connect-Four played on a cylindrical square grid board with infinite row heights and columns that cycle about its width. In previous work, the first player’s cannot-lose strategies were discovered for all circumferences, and the second player’s cannot-lose strategies were discovered for all circumferences except for 6 and 11. In this paper, we show the second player’s cannot-lose strategy for circumference 11.

Keywords: Cylinder-Infinite-Connect-Four, paving strategy

DOI: 10.3233/ICG-230215

Citation: ICGA Journal, vol. 44, no. 3, pp. 91-94, 2022

Authors: Iida, Hiroyuki | Schaeffer, Jonathan | Wu, I-Chen

Article Type: Other

Abstract: The 25th Computer Olympiad was held online during July/August 2022. With 53 participating programs competing in 18 events, the event was a success.

DOI: 10.3233/ICG-230216

Citation: ICGA Journal, vol. 44, no. 3, pp. 95-102, 2022

Authors: Tang, Shih-Chieh | Chen, Jr-Chang | Wu, I-Chen

Article Type: Other

DOI: 10.3233/ICG-230217

Citation: ICGA Journal, vol. 44, no. 3, pp. 103-107, 2022

Authors: Chen, Chieh-Yu | Lin, Shun-Shii

Article Type: Other

DOI: 10.3233/ICG-230218

Citation: ICGA Journal, vol. 44, no. 3, pp. 108-110, 2022

Authors: Chen, Chih-Hung | Chiu, Sin-Yi | Lin, Shun-Shii | Chen, Jr-Chang

Article Type: Other

DOI: 10.3233/ICG-230219

Citation: ICGA Journal, vol. 44, no. 3, pp. 111-113, 2022

Authors: Hsueh, Chu-Hsuan | Chen, Jr-Chang

Article Type: Other

DOI: 10.3233/ICG-230220

Citation: ICGA Journal, vol. 44, no. 3, pp. 114-118, 2022

Authors: Sandin, Lars

Article Type: News

DOI: 10.3233/ICG-230221

Citation: ICGA Journal, vol. 44, no. 3, pp. 119-121, 2022