發(fā)布時間：2019-03-24 15:37

【摘要】：隨著“一帶一路”與新型城鎮(zhèn)化戰(zhàn)略決策的推動與實施,中國在未來幾十年中發(fā)展的空間格局將發(fā)生巨大改變。自1978年改革開放以來,我國的經(jīng)濟迅猛增長,在短時間內(nèi)躍居全球前列,社會和諧發(fā)展,國民的生活質(zhì)量有了明顯的提升,居民地的擴張速度也愈來愈快。對居民地進(jìn)行快速準(zhǔn)確地識別和提取在推進(jìn)國家戰(zhàn)略決策,實現(xiàn)數(shù)字城市,輔助城市規(guī)劃等多個領(lǐng)域具有重大的現(xiàn)實意義。高分四號(GF-4)衛(wèi)星作為我國實施高分辨率對地觀測系統(tǒng)的重要組成部分,能夠及時有效識別地面變化,有效支撐地震、洪澇、干旱、臺風(fēng)等自然災(zāi)害救助、氣候變化研究、林業(yè)及水資源環(huán)境調(diào)查等重大行業(yè)應(yīng)用。本論文利用GF-4衛(wèi)星影像,結(jié)合其高時譜這一特性,提取并分析居民地與其他地類的光譜特征差異,并結(jié)合時序光譜使用不同方法對居民地信息進(jìn)行識別和提取。論文從以下幾個部分展開:首先,介紹了本論文的研究背景和意義,再介紹與論文主題息息相關(guān)的遙感信息提取技術(shù)和居民地識別提取技術(shù)的研究現(xiàn)狀與進(jìn)展,并提出研究內(nèi)容及技術(shù)路線。接著,介紹了GF-4衛(wèi)星影像,并對影像進(jìn)行預(yù)處理以消除來自各方面的誤差。然后,通過對GF-4影像的典型地物光譜指數(shù)特征的分析,提出基于光譜特征決策樹的居民地信息提取方法,進(jìn)而對時序光譜指數(shù)特征進(jìn)行分析,提出基于時序光譜特征決策樹的居民地信息提取方法,在此基礎(chǔ)上將時序光譜指數(shù)特征和深度學(xué)習(xí)技術(shù)同時引入居民地信息識別提取中,提出基于時序光譜特征全卷積神經(jīng)網(wǎng)絡(luò)的居民地信息提取方法。最終對三種方法的實驗結(jié)果進(jìn)行對比分析,得出結(jié)論。通過上述研究的開展,本論文可得到以下主要結(jié)論:(1)太陽高度角的變化不僅僅影響了地物光譜的大小,甚至對地物光譜的變化率大小和變化率變化的快慢也有一定的影響,且不同地物類型的光譜特征隨太陽高度角的變化特征也有所不同。(2)當(dāng)使用決策樹方法時,結(jié)合時序光譜特征對居民地信息進(jìn)行提取相較于僅結(jié)合光譜特征的提取來說,將提取精度由89.85%提升到93.38%。(3)利用全卷積神經(jīng)網(wǎng)絡(luò)可提升基于時序光譜特征居民地信息提取的提取精度,提取精度由93.38%提升到95.15%。此外,本論文有以下創(chuàng)新點:(1)將時序光譜特征與太陽高度角的關(guān)系引入到?jīng)Q策樹模型中,相比較僅利用光譜特征的居民地提取方法而言,精度有所提高。(2)將時序光譜特征與深度學(xué)習(xí)中全卷積神經(jīng)網(wǎng)絡(luò)方法相結(jié)合,較不考慮時序光譜特征或不采用深度學(xué)習(xí)的其他提取方法來說,更加提升了分類提取精度。研究基于GF-4衛(wèi)星遙感影像時序光譜的居民地識別提取方法,為減災(zāi)、防災(zāi)、推進(jìn)城鎮(zhèn)化進(jìn)程、城市精細(xì)化管理和國土資源管理等工作快速提供動態(tài)更新數(shù)據(jù),并為我國國產(chǎn)高分系列衛(wèi)星數(shù)據(jù)遙感產(chǎn)品的應(yīng)用提供技術(shù)與方法支撐和示范指導(dǎo)作用。
[Abstract]:With the promotion and implementation of "The Belt and Road Initiative" and the strategic decision of new urbanization, the spatial pattern of China's development in the coming decades will be greatly changed. Since the reform and opening up in 1978, the economy of our country has been growing rapidly, it has leaped to the forefront of the world in a short period of time, the harmonious development of the society, the quality of life of the people has been obviously improved, and the speed of the expansion of the residential land has also become more and more rapid. Rapid and accurate identification and extraction of residential land is of great practical significance in promoting national strategic decision-making, realizing digital city, assisting urban planning and so on. As an important part of China's high-resolution Earth observation system, the GF-4 satellite can effectively identify ground changes in a timely manner and effectively support natural disasters such as earthquakes, floods, droughts, typhoons, and so on. Climate change research, forestry and water resources environmental survey and other major industry applications. In this paper, we use GF-4 satellite image and its high-time spectrum to extract and analyze the difference of spectral features between residential land and other land classes, and use different methods to identify and extract resident land information combined with temporal spectrum. The thesis starts from the following parts: firstly, this paper introduces the research background and significance of this paper, and then introduces the research status and progress of remote sensing information extraction technology and residential identification extraction technology, which are closely related to the subject of the thesis. And put forward the research content and technical route. Then, the GF-4 satellite image is introduced, and the image is pre-processed to eliminate the errors from various aspects. Then, by analyzing the spectral index characteristics of typical ground objects in GF-4 images, a method of extracting resident land information based on spectral feature decision tree is proposed, and then the temporal spectral index features are analyzed. A method of extracting resident land information based on temporal spectral feature decision tree is proposed. On the basis of this method, temporal spectral index feature and depth learning technology are introduced into the identification and extraction of residential information at the same time. A method of extracting resident land information based on full convolution neural network based on temporal spectral features is proposed in this paper. Finally, the experimental results of the three methods are compared and analyzed, and a conclusion is drawn. The main conclusions of this paper are as follows: (1) the change of solar height angle not only affects the spectral size of the ground object, Even it has some influence on the spectral variation rate and the rate of change, and the spectral characteristics of different feature types vary with the solar height angle. (2) when the decision tree method is used, the spectral characteristics of the ground features vary with the solar height angle. (2) when the decision tree method is used, the spectral characteristics of the ground features vary with the solar height angle. Compared with the extraction of spectral features only, the time series spectral feature is used to extract the resident land information. The extraction accuracy is increased from 89.85% to 93.38%. (3) the extraction accuracy of resident land information based on temporal spectral features can be improved by using full convolution neural network, and the extraction precision is increased from 93.38% to 95.15%. In addition, the innovations of this thesis are as follows: (1) the relationship between temporal spectral features and solar height angle is introduced into the decision tree model, and compared with the resident extraction method which only makes use of spectral features, (2) combining the sequential spectral features with the full convolution neural network method in depth learning, the classification extraction accuracy is improved even more than other extraction methods which do not take into account the sequential spectral features or other extraction methods that do not use in-depth learning. (2) the sequential spectral features are combined with the full convolution neural network method in depth learning. Based on the temporal spectrum of GF-4 satellite remote sensing image, this paper studies the method of identification and extraction of land and land, and provides dynamic updating data for disaster reduction, disaster prevention, urbanization, urban fine management and land and resource management, and so on. It also provides technical and methodological support and demonstration guidance for the application of home-made high-grade series satellite data remote sensing products.
【學(xué)位授予單位】：中國科學(xué)院大學(xué)(中國科學(xué)院遙感與數(shù)字地球研究所)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P237

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