Image Processing 209

lemonadeviraginityAI and Robotics

Nov 6, 2013 (3 years and 9 months ago)

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Image Processing 209

Introduction to remotely sensed data
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6.1 Visualization of single band images

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• Display a satellite image
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• Zoom in/out on a displayed satellite image
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Scrolling through a displayed satellite image
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• Displaying multiple images
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• Digital numbers and pixe
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• Pixels and real world coordinates
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• Summary: Visualization of images
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6.2 Image enhancement

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6.2.1 Contrast enhancement


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• Calculation of a histogram
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• Linear stretching
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• Compare original and stretched images
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• Different linear stretch functions
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• Histogram equalization
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6.2.2 Spatial enhancement

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• Low pass filters
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• Create and apply a user
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defined low pass filter
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• High pass filters
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• Create and apply a user
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defined Laplace filter
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• Directional filters
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• Summary: Image enhancement
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6.3 Visualizing multi
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band images

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6.3.1 Color composites

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• Interactive false and pseudo natural color composites
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• Permanent Color Composites
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• Summary: Visualizing multi
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band images
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6.4 Geometric corrections and image referencing
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6.4.1 Geo
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referencing using corner coordinates

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6.4.2 Geo
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referencing a raster image using reference points

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6.4.3 Image
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to
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image registration
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6.4.4 Geo
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coding a raster image by resampling

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• Adding projection information to a coordinate system (additional

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• Summary: Geometric corrections and image referencing
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6.5 Multi
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band operations

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6.5.1 Image ratios: Brightness variations

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6.5.2 Normalized Difference Vegetation Index

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6.5.3 Multi
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band statistics

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6.5.4 Principal components analysis

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6.5.5 Image arithmetics

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6.5.6 Image fusion

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• Summary: Multi
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band operations
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6.6 Image classification
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6.6.1 Density slicing

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• Interactive slicing
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• Slicing operation
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6.6.2 Piece
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wise linear stretching

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6.6.3 Multi
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spectral image classification

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• Sampling
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• Displaying Feature Spaces
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6.6.4 Classification

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• Classification methods
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• Evaluate the reclassified results
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• Post classification operations
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• Undef majority filter
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6.6.5 Unsupervised classification (clustering)

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• Summary: Image classification
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