2 research outputs found
A Study on Image Registration between High Resolution Optical and SAR Images Using SAR-SIFT and DLSS
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Όλ¬Έ (μμ¬)-- μμΈλνκ΅ λνμ : 곡과λν 건μ€ν경곡νλΆ, 2018. 8. κΉμ©μΌ.μ΅κ·Ό μμ±μΌμ κΈ°μ μ λ°λ¬λ‘ λ€μν μΌμλ₯Ό νμ¬ν μ§κ΅¬κ΄μΈ‘μμ±μ΄ λ°μ¬λλ©΄μ, λ€μ€μΌμ μμ±μμμ μ΅ν© λΆμνλ μ°κ΅¬κ° νλ°ν μ§νλκ³ μλ€. νΉν, κ΄νμμκ³Ό SARμμμ μ·¨κΈνλ νμ₯λκ° λ¬λΌ λμμ νμ©ν κ²½μ° μ§νλ©΄μ λν΄ λ³΄λ€ κ΅¬μ²΄μ μΈ μ 보λ₯Ό μ·¨λν μ μμΌλ©°, λ λμκ°, κ°μ²΄ μΆμΆ, λ³ννμ§, μ¬λμ¬ν΄ λͺ¨λν°λ§ λ± μ격νμ¬ λΆμΌμ νλκ² μ μ©μ΄ κ°λ₯νλ€. μ΄λ₯Ό μν΄μλ μ μ²λ¦¬ μμ
μΌλ‘ λ μμ κ° μ ν©μ΄ νμμ μΌλ‘ μ΄λ£¨μ΄μ ΈμΌ νλ€. κ·Έλ¬λ, κ΄νμμκ³Ό SARμμμ μμ μ·¨λμ μμ±μΌμ μμΈ λ° μ·¨κΈνλ νμ₯λμ μμ΄ν¨μΌλ‘ κΈ°ν λ° λΆκ΄ μ 보 μ°¨μ΄λ₯Ό μ λ°νμ¬ μμ μ ν©μ μμ΄ μ λ
μ΄λ €μμ΄ μ‘΄μ¬νλ€. μ΄λ¬ν μ°¨μ΄λ κ±΄λ¬Όμ΄ λ°μ§λ λμ¬μ§μμμ λΆκ°λλ©°, μ€Β·μ ν΄μλ μμλ³΄λ€ κ³ ν΄μλ μμμμ λλλ¬μ§λ€. λ°λΌμ, λ³Έ μ°κ΅¬μμλ λμ¬μ§μμ λν κ³ ν΄μλ κ΄νμμκ³Ό SARμμ κ° μ ν©μ ν¨κ³Όμ μΈ λ°©λ²λ‘ μ μ μνμλ€.
κΈ°μ‘΄ κ΄νμμκ³Ό SARμμ κ° μ ν© κ΄λ ¨ μ°κ΅¬λ ν¬κ² νΉμ§κΈ°λ° μ ν©κΈ°λ²κ³Ό κ°λκΈ°λ° μ ν©κΈ°λ²μΌλ‘ μ§νλμλ€. κ°λκΈ°λ° μ ν©κΈ°λ²μ λΆκ΄ νΉμ±μ΄ λ€λ₯Έ μμ κ° μ ν©μ ν¨κ³Όμ μ΄λ, μμ κ° μκ³‘μ΄ μ‘΄μ¬νμ§ μκ±°λ κΈ°ννμ μμΉ μ°¨μ΄κ° μ μ λμλ§ μ μ© κ°λ₯νλ€. κ³ ν΄μλ κ΄νμμκ³Ό SARμμμ μ§μμ μκ³‘μ΄ μ‘΄μ¬νλ©°, λ μμ κ° μμm μ΄μμ κΈ°ννμ μμΉ μ°¨μ΄κ° λ°μν μ μλ€. λ°λΌμ, κ³ ν΄μλ κ΄νμμκ³Ό SARμμ κ° μ ν© μ°κ΅¬λ κ°λκΈ°λ° μ ν©κΈ°λ² λ³΄λ€ νΉμ§κΈ°λ° μ ν©κΈ°λ²μ΄ μ€μ μ μΌλ‘ μ§νλκ³ μλ€. κ·Έλ¬λ, νΉμ§κΈ°λ° μ ν©κΈ°λ²μ λΆκ΄ νΉμ±μ΄ λ€λ₯Έ κ΄νμμκ³Ό SARμμμμ μ€μ ν©μμ λ€μ μΆμΆνμ¬ μ ν© μ±λ₯μ΄ λ¨μ΄μ§λ€. μ΄λ₯Ό ν΄κ²°νκΈ° μν΄, κ°λκΈ°λ° μ ν©κΈ°λ²κ³Ό νΉμ§κΈ°λ° μ ν©κΈ°λ²μ κ²°ν©ν κΈ°λ²λ€μ΄ μ μλμμΌλ, λμ¬μ§μμμ μ νμμ΄ μ‘΄μ¬νλ μ§μμ΄λ 건물λ°μ§μ§μμ μ μΈν μ§μ λ±κ³Ό κ°μ΄ μ νλ μ§μμμλ§ μ μ© κ°λ₯νλ€λ νκ³μ μ 보μλ€. μ΄λ₯Ό κ°μ νκΈ° μν΄, λ³Έ μ°κ΅¬μμλ νΉμ§κΈ°λ° μ ν©κΈ°λ²μΈ SAR-SIFT κΈ°λ²κ³Ό κ°λκΈ°λ° μ ν©κΈ°λ²μΈ DLSS κΈ°λ²μ κ²°ν©ν μ ν©κΈ°λ²μ μ μνμλ€. λν, μ ν©μμ μΆμΆνκΈ° μν΄, μ μ²λ¦¬ λ¨κ³, ν보 μ ν©μ μΆμΆ λ¨κ³, μ λ° μ ν©μ μΆμΆ λ¨κ³μΈ μ΄ μΈ λ¨κ³λ₯Ό μΆκ°νμλ€.
κ³ ν΄μλ κ΄νμμκ³Ό SARμμ κ° μ ν©μ μν΄μ, SAR-SIFT κΈ°λ²μ μ΄μ©νμ¬ νΉμ§μ μ μΆμΆνκ³ , μΆμΆλ νΉμ§μ μμ DLSS κΈ°λ²μ μ΄μ©νμ¬ μ ν©μμ μΆμΆνμλ€. κ·Έλ¬λ, μΆμΆλ μ ν©μμ λ€μμ μ€μ ν©μμ΄ ν¬ν¨λλ λ¬Έμ μ μ΄ μ‘΄μ¬νμλ€. μ΄λ₯Ό ν΄κ²°νκΈ° μν΄, μΆμΆλ μ ν©μμμ μκ³μΉμ νΉμ§μ κ° λ³μλμ μ΄μ©ν μ μ²λ¦¬ λ¨κ³μ ν보 μ ν©μ μΆμΆ λ¨κ³λ₯Ό ν΅ν΄ ν보 μ ν©μμ μΆμΆνκ³ , ν보 μ ν©μμ RANSAC κΈ°λ²μ μ μ©νμ¬ μ λ° μ ν©μμ μΆμΆνλ λ°©λ²μ μ μνμλ€. μ΅μ’
μ μΌλ‘ μΆμΆλ μ λ° μ ν©μμ μ΄μ©νμ¬ μ΄ν λ³νμ(affine transformation)μ ꡬμ±νκ³ , μ΄λ₯Ό μ μ©νμ¬ κ΄νμμμ μ ν©λ SARμμμ μμ±νμλ€.
λ³Έ μ°κ΅¬μ μ νλλ₯Ό κ²μ¦νκΈ° μνμ¬, λνμ μΈ κ³ ν΄μλ κ΄νμμμΈ KOMPSAT-2μμκ³Ό κ³ ν΄μλ SARμμμΈ TerraSAR-X, Cosmo-SkyMedμμμ μ¬μ©νμκ³ , μκ°μ , μ λμ νκ°λ₯Ό μ§ννμλ€. μκ°μ νκ°λ₯Ό μν΄μ λͺ¨μμ΄ν¬ μμμ μμ±νμμΌλ©°, λ μμ κ° κ²½κ³μμ κ°μ²΄μ νμμ΄ μ μ§λ¨μ ν΅ν΄ μ ν©μ΄ μ°μνκ² μνλ¨μ νμΈνμλ€. μ λμ νκ°λ₯Ό μν΄μ μλ κ²μ¬μ μ ν΅ν RMSE β
κ³Ό κ΅μ°¨κ²μ¦μ ν΅ν RMSE β
‘λ₯Ό μ¬μ©νμμΌλ©°, λͺ¨λ μ€νμ§μμ λν΄ RMSE β
μ 1.51mμμ 2.04m, RMSE β
‘λ 1.34mμμ 1.69mλ‘ μ νλκ° λμΆλμλ€. μ΄λ, μ νμ°κ΅¬κ²°κ³Όμ λΉκ΅νμμ λ μ°μν μμ€μ μ νλλ‘ νμΈλμλ€. μ΄λ₯Ό ν΅ν΄, μ μ κΈ°λ²μ΄ κ³ ν΄μλ κ΄νμμκ³Ό SARμμ κ° μ ν©μ ν¨κ³Όμ μ΄λ©°, λ μμ κ° μ΅ν© λΆμμ μν΄ ν¨κ³Όμ μΈ μ ν© κΈ°μ λ‘ νμ©λ κ²μΌλ‘ μ¬λ£λλ€.1. μ λ‘ 1
1.1 μ°κ΅¬λ°°κ²½ 1
1.2 μ°κ΅¬λν₯ 4
1.3 μ°κ΅¬μ λͺ©μ λ° λ²μ 7
2. νΉμ§μ μΆμΆ 10
2.1 μμ μ μ²λ¦¬ 10
2.2 SAR-SIFT κΈ°λ²μ ν΅ν νΉμ§μ μΆμΆ 11
2.2.1. SIFT κΈ°λ²μ λ¬Έμ μ 11
2.2.2. SAR-SIFT κΈ°λ² 15
3. μ ν©μ μΆμΆ 18
3.1 DLSS κΈ°λ²μ ν΅ν μ ν©μ μΆμΆ 18
3.1.1. νμ μμ μ LSS 19
3.1.2. νμ μμ μ λ²‘ν° DLSS 21
3.1.3. DLSS κΈ°λ²μ λ¬Έμ μ 22
3.2 μ μλ μ ν©μ μΆμΆ λ°©λ² 24
3.2.1. μ μ²λ¦¬ λ¨κ³ 24
3.2.2. ν보 μ ν©μ μΆμΆ λ¨κ³ 26
3.2.3. μ λ° μ ν©μ μΆμΆ λ¨κ³ 28
3.3 μ ν© λ° μ νλ νκ° λ°©λ² 29
3.3.1. μ΄ν λ³νμ 29
3.3.2. μ νλ νκ° λ°©λ² 31
4. μ€νμ μ μ© λ° νκ° 32
4.1 μ€νμ§μ λ° μλ£ 32
4.2 νΉμ§μ μΆμΆ κ²°κ³Ό 35
4.2.1. SIFT κΈ°λ²μ ν΅ν νΉμ§μ μΆμΆ κ²°κ³Ό 35
4.2.2. SAR-SIFT κΈ°λ²μ ν΅ν νΉμ§μ μΆμΆ κ²°κ³Ό 37
4.3 μ ν©μ μΆμΆ κ²°κ³Ό 40
4.3.1. κΈ°μ‘΄ κΈ°λ²μ ν΅ν μ ν©μ μΆμΆ κ²°κ³Ό 40
4.3.2. μ μ κΈ°λ²μ ν΅ν μ ν©μ μΆμΆ κ²°κ³Ό 44
4.4 μ ν© κ²°κ³Ό λ° νκ° 49
5. κ²°λ‘ 55
Abstract 67Maste
Multimodal Remote Sensing Image Registration with Accuracy Estimation at Local and Global Scales
This paper focuses on potential accuracy of remote sensing images
registration. We investigate how this accuracy can be estimated without ground
truth available and used to improve registration quality of mono- and
multi-modal pair of images. At the local scale of image fragments, the
Cramer-Rao lower bound (CRLB) on registration error is estimated for each local
correspondence between coarsely registered pair of images. This CRLB is defined
by local image texture and noise properties. Opposite to the standard approach,
where registration accuracy is only evaluated at the output of the registration
process, such valuable information is used by us as an additional input
knowledge. It greatly helps detecting and discarding outliers and refining the
estimation of geometrical transformation model parameters. Based on these
ideas, a new area-based registration method called RAE (Registration with
Accuracy Estimation) is proposed. In addition to its ability to automatically
register very complex multimodal image pairs with high accuracy, the RAE method
provides registration accuracy at the global scale as covariance matrix of
estimation error of geometrical transformation model parameters or as
point-wise registration Standard Deviation. This accuracy does not depend on
any ground truth availability and characterizes each pair of registered images
individually. Thus, the RAE method can identify image areas for which a
predefined registration accuracy is guaranteed. The RAE method is proved
successful with reaching subpixel accuracy while registering eight complex
mono/multimodal and multitemporal image pairs including optical to optical,
optical to radar, optical to Digital Elevation Model (DEM) images and DEM to
radar cases. Other methods employed in comparisons fail to provide in a stable
manner accurate results on the same test cases.Comment: 48 pages, 8 figures, 5 tables, 51 references Revised arguments in
sections 2 and 3. Additional test cases added in Section 4; comparison with
the state-of-the-art improved. References added. Conclusions unchanged.
Proofrea