GEOG 330 Chapter 5 - Elements of Visual Interpretation...

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Elements of Visual Interpretation GEOG330
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The Importance of Visual Image Interpretation ! Examination of the ground from an aerial perspective provides an aerial/regional perspective – The Synoptic View ! Stereoscopic imagery provide a three-dimensional depth perception ! Taking advantage of the advanced sensor’s capabilities, we can extend our knowledge beyond human visual perception ! Historical image interpretation provides the ability to obtain a perspective of the temporal and spatial dynamics
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Difficulties of visual image interpretation ! We lose our sense of depth when viewing a two-dimensional image ! Viewing objects from directly above provides a very different perspective than that which we are most familiar
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Difficulties of visual image interpretation ! Combining an unfamiliar perspective with a very different scale can make even the most familiar object unrecognizable in an image ! We are used to seeing only in the visible portion of the EM spectrum; thus, interpreting bands from other portions of the EM spectrum means that we have to understand the spectral nature of reflectance of different targets
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Elements of visual image interpretation ! Recognizing targets for image interpretation and information extraction requires the comparison of different targets from its background and surrounding elements based on any, or all, of the visual elements of visual interpretation: " Tone/color; size; shape; texture; pattern; shadow; and, association ( see Table 5-1 for all nine elements ) ! Identifying targets in remotely sensed images based on these visual elements allows further interpretation and analysis
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Elements of Image Interpretation :
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This note was uploaded on 01/16/2012 for the course GEOG 330 taught by Professor Marsh during the Fall '07 term at University of Arizona- Tucson.

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GEOG 330 Chapter 5 - Elements of Visual Interpretation...

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