QGIS/python/plugins/processing/algs/otb/description/doc/ComputePolylineFeatureFromImage.html

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</head><body><h1>ComputePolylineFeatureFromImage</h1><h2>Brief Description</h2>This application compute for each studied polyline, contained in the input VectorData, the chosen descriptors.<h2>Tags</h2>Feature Extraction<h2>Long Description</h2>The first step in the classifier fusion based validation is to compute, for each studied polyline, the chosen descriptors. <h2>Parameters</h2><ul><li><b>[param] -in</b> &lt;string&gt; An image to compute the descriptors on.. Mandatory: True. Default Value: &quot;&quot;</li><li><b>[param] -vd</b> &lt;string&gt; Vector data containing the polylines where the features will be computed.. Mandatory: True. Default Value: &quot;&quot;</li><li><b>[param] -elev</b> &lt;string&gt; This group of parameters allows managing elevation values. Supported formats are SRTM, DTED or any geotiff processed by the DEM import application. Mandatory: True. Default Value: &quot;0&quot;</li><li><b>[param] -expr</b> &lt;string&gt; The feature formula (b1 < 0.3) where b1 is the standard name of input image first band. Mandatory: True. Default Value: &quot;&quot;</li><li><b>[param] -field</b> &lt;string&gt; The field name corresponding to the feature codename (NONDVI, ROADSA...). Mandatory: True. Default Value: &quot;&quot;</li><li><b>[param] -out</b> &lt;string&gt; The output vector data containing polylines with a new field. Mandatory: True. Default Value: &quot;&quot;</li></ul><h2>Limitations</h2>Since it does not rely on streaming process, take care of the size of input image before launching application.<h2>Authors</h2>OTB-Team<h2>See Also</h2> <h2>Example of use</h2><ul><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">in: NDVI.TIF</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">vd: roads_ground_truth.shp</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">expr: "(b1 > 0.4)"</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">field: NONDVI</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">out: PolylineFeatureFromImage_LI_NONDVI_gt.shp</p></li></ul></body></html>
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spelling fixes 2014-05-17 17:35:27 +02:00			</head><body><h1>ComputePolylineFeatureFromImage</h1><h2>Brief Description</h2>This application compute for each studied polyline, contained in the input VectorData, the chosen descriptors.<h2>Tags</h2>Feature Extraction<h2>Long Description</h2>The first step in the classifier fusion based validation is to compute, for each studied polyline, the chosen descriptors. <h2>Parameters</h2><ul><li><b>[param] -in</b> <string> An image to compute the descriptors on.. Mandatory: True. Default Value: ""</li><li><b>[param] -vd</b> <string> Vector data containing the polylines where the features will be computed.. Mandatory: True. Default Value: ""</li><li><b>[param] -elev</b> <string> This group of parameters allows managing elevation values. Supported formats are SRTM, DTED or any geotiff processed by the DEM import application. Mandatory: True. Default Value: "0"</li><li><b>[param] -expr</b> <string> The feature formula (b1 < 0.3) where b1 is the standard name of input image first band. Mandatory: True. Default Value: ""</li><li><b>[param] -field</b> <string> The field name corresponding to the feature codename (NONDVI, ROADSA...). Mandatory: True. Default Value: ""</li><li><b>[param] -out</b> <string> The output vector data containing polylines with a new field. Mandatory: True. Default Value: ""</li></ul><h2>Limitations</h2>Since it does not rely on streaming process, take care of the size of input image before launching application.<h2>Authors</h2>OTB-Team<h2>See Also</h2> <h2>Example of use</h2><ul><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">in: NDVI.TIF</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">vd: roads_ground_truth.shp</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">expr: "(b1 > 0.4)"</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">field: NONDVI</p></li><li><p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">out: PolylineFeatureFromImage_LI_NONDVI_gt.shp</p></li></ul></body></html>