This study introduces an algorithm for geometric distortion corrections in sonar images. The proposed algorithm mainly consists of two stages. At the first stage, the raw images are processed with median filter and Frost filter for noise reduction and intensity enhancement. In the last stage, the geometric distortion correction is conducted using angular information given by a gyro sensor. The algorithm was successfully applied on raw sonar data collected on a pier survey.

• Hoai-Nam Ho(Graduate student, Sejong University) | 호호아이남
• Lee, Jong Jae(Assistant Professor, Sejong University) | 이종재
• Park Cheol(Daumend CEO) | 박철
• Cho Byung Wan(Full Professor, Hanyang University) | 조병완