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조명 및 카메라 이동속도가 토양 영상에 미치는 영향

Effect of light illumination and camera moving speed on soil image quality

  • 정선옥 (충남대학교 바이오시스템기계공학과) ;
  • 조기현 (충남대학교 바이오시스템기계공학과) ;
  • 정기열 (국립식량과학원 기능성작물부 기능성잡곡과)
  • Chung, Sun-Ok (Department of Biosystems Machinery Engineering, Chungnam National University) ;
  • Cho, Ki-Hyun (Department of Biosystems Machinery Engineering, Chungnam National University) ;
  • Jung, Ki-Yuol (Department of Functional Crop, National Academy of Crop Science)
  • 투고 : 2012.05.29
  • 심사 : 2012.09.26
  • 발행 : 2012.09.30

초록

Soil texture has an important influence on agriculture such as crop selection, movement of nutrient and water, soil electrical conductivity, and crop growth. Conventionally, soil texture has been determined in the laboratory using pipette and hydrometer methods requiring significant amount of time, labor, and cost. Recently, in-situ soil texture classification systems using optical diffuse reflectometry or mechanical resistance have been reported, especially for precision agriculture that needs more data than conventional agriculture. This paper is a part of overall research to develop an in-situ soil texture classification system using image processing. Issues investigated in this study were effects of sensor travel speed and light source and intensity on image quality. When travel speed of image sensor increased from 0 to 10 mm/s, travel distance and number of pixel were increased to 3.30 mm and 9.4, respectively. This travel distances were not negligible even at a speed of 2 mm/s (i.e., 0.66 mm and 1.4), and image degradation was significant. Tests for effects of illumination intensity showed that 7 to 11 Lux seemed a good condition minimizing shade and reflection. When soil water content increased, illumination intensity should be greater to compensate decrease in brightness. Results of the paper would be useful for construction, test, and application of the sensor.

키워드

참고문헌

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