fce 552 part6-3
TRANSCRIPT
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Dept. of Geospatial & Space Technology
University of NairobiB. Sc. (Civil Engineering)
1.1. Concept of image interpretationConcept of image interpretation
2.2. Procedures of InterpretationProcedures of Interpretation
3.3. Interpretation ElementsInterpretation Elements
4.4. Interpretation KeysInterpretation Keys
5.5. Applications of Image Applications of Image
InterpretationInterpretation
FCE 552: Engineering Survey IV
Image Interpretation
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Dept. of Geospatial & Space Technology
University of NairobiEngineering Surveying IV
Concept of Image Concept of Image InterpretationInterpretation
FCE 552: Engineering Survey IV
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Dept. of Geospatial & Space Technology
University of NairobiEngineering Surveying IV
FCE 552: Engineering Survey IV
The Remote Sensing The Remote Sensing ProcessProcess
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
To extract qualitative and quantitative information To extract qualitative and quantitative information
from imagery about the from imagery about the shape, location, structure, shape, location, structure,
characteristics, quality, condition, relationshipcharacteristics, quality, condition, relationship of of
and between objects using human knowledge.and between objects using human knowledge.
Objective of Image Objective of Image InterpretationInterpretation
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Information from Information from ImageryImagery
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Human Interpretation vs Human Interpretation vs Computer based Computer based InterpretationInterpretation
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Procedures of InterpretationProcedures of Interpretation
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Procedures of Procedures of InterpretationInterpretation
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Classification involves assigning all pixels in the Image Classification involves assigning all pixels in the
image to particular classes or themes (e.g., water, image to particular classes or themes (e.g., water,
coniferous forest, deciduous forest, coniferous forest, deciduous forest, maizemaize, wheat, etc.). , wheat, etc.).
The resulting classified image is comprised of a mosaic of The resulting classified image is comprised of a mosaic of
pixels, each of which belong to a particular theme, and is pixels, each of which belong to a particular theme, and is
essentially a thematic "map" of the original image.essentially a thematic "map" of the original image.
Image ClassificationImage Classification (1)(1)
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Information Classes and Spectral ClassesInformation Classes and Spectral Classes::
Information classesInformation classes are those categories of interest that are those categories of interest that
the analyst is actually trying to identify in the imagery, the analyst is actually trying to identify in the imagery,
such as different kinds of crops, different forest types or such as different kinds of crops, different forest types or
tree species, different geologic units or rock types, etc. tree species, different geologic units or rock types, etc.
Spectral classesSpectral classes are groups of pixels that are uniform (or are groups of pixels that are uniform (or
near-similar) with respect to their brightness values in near-similar) with respect to their brightness values in
the different spectral channels of the data. the different spectral channels of the data.
The objective is to The objective is to matchmatch the spectral classes in the data the spectral classes in the data
to the information classes of interest. Rarely is there a to the information classes of interest. Rarely is there a
simple one-to one match between these two types of simple one-to one match between these two types of
classes. classes.
Image ClassificationImage Classification (2)(2)
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Interpretation ElementsInterpretation Elements
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Interpretation ElementsInterpretation Elements
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Interpretation KeysInterpretation Keys
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of Tone/ColourElements of Tone/Colour
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of Size & Elements of Size & ShapeShape
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of TextureElements of Texture
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of PatternElements of Pattern
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of Height & Elements of Height & ShadowShadow
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Elements of Associated Elements of Associated RelationshipsRelationships
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Interpretation Keys for TreesInterpretation Keys for Trees
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Applications of Image Applications of Image InterpretationInterpretation
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Interpretation of Aster ImageInterpretation of Aster Image
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Colour CompositionColour Composition
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – Land Image Interpretation – Land CoversCovers
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – FloodsImage Interpretation – Floods
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – WildlifeImage Interpretation – Wildlife
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – VolcanoImage Interpretation – Volcano
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – MineImage Interpretation – Mine
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – Image Interpretation – EnvironmentEnvironment
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Dept. of Geospatial & Space Technology
University of Nairobi
FCE 552: Engineering Survey IV
B. Sc. (Civil Engineering)
Image Interpretation – OceanImage Interpretation – Ocean