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系統識別號 U0026-0309201822560700
論文名稱(中文) 基於物件分析萃取高解析度衛星影像農地範圍之不透水表面
論文名稱(英文) Object-based Detection of Impervious Area in Agriculture Land Using High-Resolution Satellite Image
校院名稱 成功大學
系所名稱(中) 測量及空間資訊學系
系所名稱(英) Department of Geomatics
學年度 106
學期 2
出版年 107
研究生(中文) 李若妲
研究生(英文) Nurahida Laili
學號 P66057042
學位類別 碩士
語文別 英文
論文頁數 63頁
口試委員 指導教授-王驥魁
口試委員-饒見有
口試委員-徐百輝
口試委員-郭鴻裕
中文關鍵字 none 
英文關鍵字 image classification  image segmentation  object-based image analysis  Pleiades image 
學科別分類
中文摘要 none
英文摘要 Agricultural land is important for the food security of a nation. However, the total agriculture land area across the world has been decreasing every year due to human activities. Developing technology, especially in businesses and other industries, is resulting in increased construction of buildings, which then results in loss of land. People build factories, houses, etc. on agricultural areas, which then become impervious areas as the water absorption ability of the ground underneath decreases. The loss of farmland could further pose a threat to national food production, leading to shortages and soil pollution. Thus, periodical assessments to record the change in the total farmland area need to be carried out.
Traditional manual digitation is usually conducted to detect impervious areas in agricultural land. However, this process is laborious in Taiwan, a country with a large agricultural land area. Thus, this study uses an object-based approach that employs high-resolution satellite images to detect the impervious areas. A pan-sharpened Pleiades image with 0.5-meter resolution and four spectral bands were utilized. The HSV (hue-saturation-value) bands derived from the RGB bands were added as object features to extract the impervious area. The spectral feature, i.e., HSV, NDVI, NDWI, the soil extraction algorithms, and the shape feature, i.e., size and compactness, were deployed to extract the impervious area within the agricultural land. An F1-score of 0.70 was obtained from this proposed method. Furthermore, the transferability test was carried out by testing two different conditions. The first condition was tested by slicing one-image subset into three different sizes. The second condition was tested by analysing four Pleiades image subsets with various scenes and different acquisition times. The result shows that the method is stable enough to process various image scenes.
論文目次 Abstract i
Acknowledgement iii
Table of Contents iv
List of Figures v
List of Tables viii
Chapter 1: Introduction 1
Chapter 2: Data and Methodology 4
2.1 Data 4
2.2 Study area 7
2.3 Methods 8
2.2.1 Segmentation 11
2.2.2 Classification 20
2.2.3 Small-Scale Processing 29
2.2.4 Accuracy Test 32
Chapter 3: Results and Discussion 36
3.1. Object-based Detection Result 36
3.2. Accuracy Test 44
3.3 Transferability Test 49
Chapter 4: Conclusions 58
References 60
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