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interimage:attributes_description [2010/06/23 17:57] rsilva |
interimage:attributes_description [2010/06/23 17:58] rsilva |
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{{ :interimage:shapeindex.png }} | {{ :interimage:shapeindex.png }} | ||
Where P is the polygon perimeter and A is the area. | Where P is the polygon perimeter and A is the area. | ||
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===== Spectral Statistical Attributes ===== | ===== Spectral Statistical Attributes ===== | ||
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* **SumPixelsValues** - Represents the sum of all element values inside an area for one given image band/channel. | * **SumPixelsValues** - Represents the sum of all element values inside an area for one given image band/channel. | ||
- | a * **Variance** - Like the standard deviation, the variance also represents the numerical data dispersion degree surrounding the mean but in the original data value scale. It is defined by: | + | * **Variance** - Like the standard deviation, the variance also represents the numerical data dispersion degree surrounding the mean but in the original data value scale. It is defined by: |
{{ interimage:att_variance.gif }} | {{ interimage:att_variance.gif }} | ||