Computer Processing of Remotely-Sensed Images A thorough introduction to computer processing of remotely-sensed images, processing methods, and applications Remote sensing is a crucial form of measurement that allows for the gauging of an object or space without direct physical contact, allowing for the assessment and recording of a target under conditions which would normally render access difficult or impossible. This is done through the analysis and interpretation of electromagnetic radiation (EMR) that is reflected or emitted by an object, surveyed and recorded by an observer or instrument that is not in contact with the target. This methodology is particularly of importance in Earth observation by remote sensing, wherein airborne or satellite-borne instruments of EMR provide data on the planet’s land, seas, ice, and atmosphere. This permits scientists to establish relationships between the measurements and the nature and distribution of phenomena on the Earth’s surface or within the atmosphere. Still relying on a visual and conceptual approach to the material, the fifth edition of this successful textbook provides students with methods of computer processing of remotely sensed data and introduces them to environmental applications which make use of remotely-sensed images. The new edition’s content has been rearranged to be more clearly focused on image processing methods and applications in remote sensing with new examples, including material on the Copernicus missions, microsatellites and recently launched SAR satellites, as well as time series analysis methods. The fifth edition of Computer Processing of Remotely-Sensed Images also contains: A cohesive presentation of the fundamental components of Earth observation remote sensing that is easy to understand and highly digestible Largely non-technical language providing insights into more advanced topics that may be too difficult for a non-mathematician to understand Illustrations and example boxes throughout the book to illustrate concepts, as well as revised examples that reflect the latest information References and links to the most up-to-date online and open access sources used by students Computer Processing of Remotely-Sensed Images is a highly insightful textbook for advanced undergraduates and postgraduate students taking courses in remote sensing and GIS in Geography, Geology, and Earth & Environmental Science departments.

Table of Contents:
Preface to the First Edition Preface to the Second Edition Preface to the Third Edition Preface to the Fourth Edition Preface to the Fifth Edition List of Examples Chapter 1: Remote Sensing: Basic Principles 1.1 Introduction 1.2 Electromagnetic radiation and its properties 1.2.1 Terminology 1.2.2 Nature of electromagnetic radiation 1.2.3 The electromagnetic spectrum 1.2.4 Sources of electromagnetic radiation 1.2.5 Interactions with the Earth's atmosphere 1.3 Interaction with Earth surface materials 1.3.1 Introduction 1.3.2 Spectral reflectance of Earth surface materials 1.3.2.1 Vegetation 1.3.2.2 Geology 1.3.2.3 Water bodies 1.3.2.4 Soils 1.4 Summary References Chapter 2: Remote Sensing Platforms and Sensors 2.1 Introduction 2.2 Characteristics of imaging remote sensing instruments 2.2.1 Spatial resolution 2.2.2 Spectral resolution 2.2.3 Radiometric resolution 2.3 Optical, near-infrared and thermal imaging sensors 2.3.1 Along-Track Scanning Radiometer (ATSR) 2.3.2 Advanced Very High Resolution Radiometer (AVHRR) and Visible Infrared Imager Radiometer Suite (VIIRS) 2.3.3 MODIS (MODerate Resolution Imaging Spectrometer) 2.3.4 Ocean observing instruments 2.3.5 IRS LISS 2.3.6 Landsat instruments 2.3.6.1 Landsat Multi-Spectral Scanner (MSS) 2.3.6.2 Landsat Thematic Mapper (TM) 2.3.6.3 Enhanced Thematic Mapper Plus (ETM+) 2.3.6.4 Landsat 8 2.3.6.5 Landsat 9 2.3.6.6 Landsat Next 2.3.7 SPOT sensors 2.3.7.1 SPOT High Resolution Visible (HRV) 2.3.7.2 Vegetation (VGT) 2.3.7.3 SPOT Follow-on Programme 2.3.8 Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) 2.3.9ESA Sentinel Programme 2.3.9.1 Sentinel-2 Multi-Spectral Imager (MSI) 2.3.9.2 Sentinel-3 OLCI and SLSTR 2.3.10 High-resolution commercial and small satellite systems 2.4 Microwave imaging sensors 2.4.1. European Space Agency Synthetic Aperture Spaceborne Radars 2.4.2 Radarsat 2.4.3 TerraSAR-X and COSMO-SkyMed 2.4.3 ALOS PALSAR 2.4.4 Sentinel-1 SAR 2.5 Summary References Chapter 3: Pre-Processing of Remotely Sensed Data 3.1 Introduction 3.2 Cosmetic operations 3.2.1 Missing scan lines 3.2.2 De-striping methods 3.2.2.1 Linear method 3.2.2.2 Histogram matching 3.2.2.3 Other de-striping methods 3.3 Geometric correction and registration 3.3.1 Orbital geometry model 3.3.2 Transformation based on ground control points 3.3.3 Resampling procedures 3.3.4 Image registration 3.3.5 Other geometric correction methods 3.4 Atmospheric correction 3.4.1 Background 3.4.2 Image-based methods 3.4.3 Radiative transfer models 3.4.4 Empirical line method 3.5 Illumination and view angle effects 3.6 Sensor calibration 3.7 Terrain effects 3.8 Summary References Chapter 4: Image Enhancement Techniques 4.1 Introduction 4.2 Human visual system 4.3 Contrast enhancement 4.3.1 Linear contrast stretch 4.3.2 Histogram equalisation 4.3.3 Gaussian stretch 4.4 Pseudocolour enhancement 4.4.1 Density slicing 4.4.2 Pseudocolour transform 4.5 Summary References Chapter 5: Image Transforms 5.1 Introduction 5.2 Arithmetic operations 5.2.1 Image addition 5.2.2 Image subtraction 5.2.3 Image multiplication 5.2.4 Image division and vegetation indices 5.3 Empirically based image transforms 5.3.1 Perpendicular Vegetation Index 5.3.2 Tasselled Cap (Kauth-Thomas) transformation 5.4 Principal Components Analysis 5.4.1 Standard Principal Components Analysis 5.4.2 Noise-adjusted Principal Components Analysis 5.4.3 Decorrelation stretch 5.5 Hue, Saturation and Intensity (HSI) transform 5.6 The Discrete Fourier Transform 5.6.1 Introduction 5.6.2 Two-dimensional Fourier transform 5.6.3 Applications of the Fourier transform 5.7 The Discrete Wavelet Transform 5.7.1 Introduction 5.7.2 The one-dimensional Discrete Wavelet Transform 5.7.3 The two-dimensional Discrete Wavelet Transform 5.8 Change Detection 5.8.1 Introduction 5.8.2 NDVI Difference Image 5.8.3 Principal Components Analysis 5.8.4 Canonical Correlation Change Analysis 5.8.5 Time Series Analysis 5.8.6 Summary 5.9 Image fusion 5.9.1 Introduction 5.9.2 Hue, Saturation and Intensity (HSI) algorithm. 5.9.3 Principal Components Analysis 5.9.4 Gram-Schmidt orthogonalisation 5.9.5 Wavelet based methods 5.9.6 Evaluation – Subjective methods 5.9.7 Evaluation  – Objective methods 5.10 Summary References Chapter 6: Filtering Techniques 6.1 Introduction 6.2 Spatial domain low-pass (smoothing) filters 6.2.1 Moving average filter 6.2.2 Median filter 6.2.3 Adaptive filters 6.3 Spatial domain high-pass (sharpening) filters 6.3.1 Image subtraction method 6.3.2 Derivative-based methods 6.4 Spatial domain edge detectors 6.5 Frequency domain filters 6.6 Summary References Chapter 7: Classification 7.1 Introduction 7.2 Geometrical basis of classification 7.3 Unsupervised classification 7.3.1 The k-means algorithm 7.3.2 ISODATA 7.3.3 A modified k-means algorithm 7.4 Supervised classification 7.4.1 Training samples 7.4.2 Statistical classifiers 7.4.2.1 Parallelepiped classifier 7.4.2.2 Centroid (k-means) classifier 7.4.2.3 Maximum likelihood method 7.4.3 Neural classifiers 7.5 Sub-pixel classification techniques 7.5.1 The linear mixture model 7.5.2 Spectral Angle Mapping 7.5.3 Independent Components Analysis 7.5.4 Fuzzy classifiers 7.6 More advanced approaches to image classification 7.6.1 Support Vector Machines 7.6.2 Decision tree classifiers 7.6.3 Other approaches to classification 7.6.3.1Rule based methods and the Genetic Algorithm 7.6.3.2Object-oriented methods 7.6.3.3Other methods 7.6.3.3.1Evidential Reasoning 7.6.3.3.2Bagging, boosting and ensembles of classifiers 7.7 Incorporation of non-spectral features 7.7.1 Texture 7.7.2 Use of external data 7.8 Contextual information 7.9 Feature selection 7.10 Classification accuracy 7.11 Summary References Chapter 8 Advanced Topics 8.1 Introduction 8.2 SAR interferometry 8.2.1 Basic principles 8.2.2 Interferometric processing 8.2.3 Problems in SAR interferometry 8.2.4 Applications of SAR interferometry 8.3 Imaging spectroscopy 8.3.1 Introduction 8.3.2 Processing imaging spectrometer data 8.3.2.1 Derivative analysis 8.3.2.2 Smoothing and denoising the reflectance spectrum 8.3.2.2.1 Savitzky-Golay polynomial smoothing 8.3.2.2.2 Denoising using the Discrete Wavelet Transform 8.3.2.3 Determination of ‘red edge’ characteristics of vegetation 8.3.2.4 Continuum removal 8.4 Lidar 8.4.1 Introduction 8.4.2 Lidar details 8.4.3 Lidar applications 8.5 Summary References Appendix A Index