원격감지 영상의 콘트라스트 향상 = Contrast Enhancement of Remotely Sensed Images

다국어 초록 (Multilingual Abstract)

In this paper we discussed the processing procedures of histogram equalization(HE) method and brightness preserving hi-histogram equalization(BBHE) method in the contrast enhancement methods for the performance comparison. With remotely sensed image data of Landsat TM we compared the performances of four methods about Min-Max method, ± 1SD method, HE method, BBHE method. The simulation results demonstrate that the HE method and BBHE method are more effective in the contrast enhancement performances than the Min-Max method and ± 1SD method. In the HE method the mean brightness of the resultant output images approached to the middle gray level with regardless of input image mean. In the BBHE method, it is capable of preserving the mean brightness of a input image compared to the HE method while enhancing the contrast of input image effectively. Thus it is provided more natural enhancement effect than the HE method.

목차 (Table of Contents)

• Ⅰ.서 론
• Ⅱ.히스토그램 평활화(Histogram Equalization)
• 1.히스토그램 평활화 과정
• 2.평균값 보존 히스토그램 평활화(BBHE:Brightness Preserving Bi-Histogram Equalization)
• Ⅲ.실험 결과 및 고찰
• 1.실험 영상데이터
• 2.성능평가를 위한 실험 및 결과 검토
• Ⅳ.결 론