First-order texture
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(Difference between revisions)
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Standard deviation or variance of gray levels in a region in the neighborhood of | Standard deviation or variance of gray levels in a region in the neighborhood of | ||
a pixel are examples of measures of first-order texture. | a pixel are examples of measures of first-order texture. | ||
| + | * In the search engine of the Processing Toolbox, type '''neighbors''' and select '''r.neighbors''' under Raster of GRASS GIS 7 commands. | ||
| + | * Under the Parameters tab, select a single band file as input layer. | ||
| + | * Select '''stddev''' from the drop-down list '''Neighborhood operation'''. | ||
| + | * Select an odd integer number as '''Neighborhood size''' in pixels. | ||
| + | * Tick '''Use circular neighborhood'''. | ||
| + | [[File:Qgis_texture_stdev.png|400px]] | ||
[[category:Spatial Filtering]] | [[category:Spatial Filtering]] | ||
Revision as of 21:57, 18 November 2017
Standard deviation or variance of gray levels in a region in the neighborhood of a pixel are examples of measures of first-order texture.
- In the search engine of the Processing Toolbox, type neighbors and select r.neighbors under Raster of GRASS GIS 7 commands.
- Under the Parameters tab, select a single band file as input layer.
- Select stddev from the drop-down list Neighborhood operation.
- Select an odd integer number as Neighborhood size in pixels.
- Tick Use circular neighborhood.
