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姓名 廖文宏(wen-Hung Liao) 查詢紙本館藏 畢業系所 土木工程學系 論文名稱 小波多層次解析之影像融合應用
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摘要(中) 遙感探測利用衛星或載具之光學機械掃描系統來偵測地面物體之各種不同波長之自然電磁波,或以系統本身主動發射電磁波再由接收器偵測反射回來之電磁波,從空中獲取大範圍涵蓋面積之地面資訊,然而,一個感測器要能同時提供具備高空間解析力及高光譜解析力的影像卻在技術上有相當的困難,因此,影像融合(Image Fusion)技術可以結合來自於不同感測器的影像,並擷取各自影像中的優點以融合成兼具融合前各影像優點之新影像,以融合一張高解析力全色態影像和一張低解析力多光譜影像而言,此融合影像應兼具全色態影像中的高解析力又具有多光譜影像的彩色資訊。然而,影像融合技術雖能使高解析力全色態影像與低解析力多光譜影像進行融合得到具高解析力的多光譜影像,但是並不表示融合技術就能融合任何解析力差異倍數的全色態影像與多光譜影像,因為影像融合技術的前提即在於能同時保有各影像融合前之優點,因此,為了評估全色態影像和多光譜影像融合時解析力差異倍數之限制,本研究以各個不同解析力差異倍數的高解析力全色態影像與低解析力多光譜影像,應用IHS影像融合法與小波函數影像融合法進行影像融合,並且為了評估融合影像是否保留住高解析力全色態影像的空間資訊與低解析力多光譜影像的多光譜資訊,分別就影像的光譜資訊和紋理兩方面以統計的方法卡方檢定進行評估其融合結果,探討其融合時差異倍數限制。 摘要(英) Satellites can detect various wavelengths from ground in remote sensing, but it is difficult technologically that single sensor can not provides both high spectrum and resolution image. Therefore, image fusion is an useful technique to integrate images from different sensors and produce a new fused image, and the fused image has the advantages of every images. For instance, the new image which is fused from the high resolution panchromatic image and the low resolution multispectrum image must contain high resolution from the panchromatic image and color information from the multispectrum image. Although we can fuse a high resolution panchromatic image and a low resolution multispectrum image to get a fusion image with high resolution and multispectrum, it doesn’t represent image fusion can fuse panchromatic image and multispectrum image at any resolution differences. It is necessary to keep advantages of high resolution from the panchromatic image and color information from the multispectrum image. Therefore, in order to evaluate the limit of resolution difference between panchromatic image and multispectrum image, our method is to fuse high resolution panchromatic image and low resolution multispectrum image in every different resolution differences with IHS image fusion and wavelet image fusion. Then, using Chi-Square test from spectrum and texture evaluates whether fusion image keeps spacial information from the panchromatic image and color information from the multispectrum image. 關鍵字(中) ★ 灰值共現矩陣
★ 卡方檢定
★ 影像融合關鍵字(英) ★ Chi-Square Test
★ Gray Level Co-occurrence Matrix(GLCM)
★ Image Fusion論文目次 中文摘要 I
英文摘要 II
目錄 III
圖目錄 V
表目錄 XI
第一章 緒論 1
1.1 研究動機與目的 1
1.2 研究方法及內容 3
1.3 論文架構 5
第二章 文獻回顧 6
第三章 IHS與小波函數法影像融合 10
3.1 IHS影像融合 10
3.1.1 IHS彩色模型 10
3.1.1.1 濾核型(kernel-based)IHS彩色模型 11
3.1.1.2 Gonzalez and Woods的IHS彩色模型 13
3.1.2 IHS影像融合 13
3.2 小波轉換 15
3.2.1 前言 15
3.2.2 Haar小波 16
3.2.3 Daubechies小波 19
3.3 小波多重解析度分析 20
3.3.1 小波分解與重建 20
3.3.2 多重解析度分析 23
3.4 二維小波轉換 23
3.5 小波函數法影像融合 27
第四章 影像融合解析力差異倍數限制評估 29
4.1 融合解析力差異倍數限制評估 29
4.2 卡方檢定 32
4.3 評估多光譜彩色資訊部分 34
4.4 評估空間解析力部分 34
4.4.1 紋理分析 35
4.4.2 灰度共現矩陣(GLCM) 35
4.4.3 以卡方檢定評估空間解析力部分 38
第五章 測試影像資料與成果 40
5.1 實驗資料與設計 40
5.2 影像融合成果與解析力差異倍數限制評估 53
5.2.1 不同解析力差異倍數之IHS融合影像成果 53
5.2.2 不同解析力差異倍數之小波融合影像成果 64
5.2.3 評估多光譜彩色資訊部分 75
5.2.4 紋理分析部分 79
5.3 模擬各衛星影像融合及評估 84
第六章 結論與建議 91
6.1 結論 91
6.2 建議 93
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