The detection and measurement of faint features in cometary image is generally troublesome due to the high value of the ratio of the brightness of the nucleus to the tail, the large size and low surface brightness of the coma and tail and the disturbing presence of field stars trails. The image processing is based on background removal by median filtering. Sample results are shown for the case study of comet 73P/Schwassmann-Wachmann 3.

• 박영식(한국천문연구원) | Y.-S. PARK (Korea Astronomy and Space Science Institute)
• 이충욱(한국천문연구원) | C.-U. LEE (Korea Astronomy and Space Science Institute)
• 진호(한국천문연구원) | H. JIN (Korea Astronomy and Space Science Institute)
• 박장현(한국천문연구원) | J.-H. PARK (Korea Astronomy and Space Science Institute)
• 한원용(한국천문연구원) | W.-Y. HAN (Korea Astronomy and Space Science Institute)