RGB renderer

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 // Copyright 2018 Esri. // // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. // You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific // language governing permissions and limitations under the License.  using ArcGIS.Samples.Managers; using Esri.ArcGISRuntime.Mapping; using Esri.ArcGISRuntime.Rasters; using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls;  namespace ArcGIS.WPF.Samples.RasterRgbRenderer {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "RGB renderer",  category: "Layers",  description: "Apply an RGB renderer to a raster layer to enhance feature visibility.",  instructions: "Choose one of the stretch parameter types. The other options will adjust based on the chosen type. Add your inputs and select the 'Update' button to update the renderer.",  tags: new[] { "analysis", "color", "composite", "imagery", "multiband", "multispectral", "pan-sharpen", "photograph", "raster", "spectrum", "stretch", "visualization" })]  [ArcGIS.Samples.Shared.Attributes.OfflineData("7c4c679ab06a4df19dc497f577f111bd")]  public partial class RasterRgbRenderer  {  // A reference to the raster layer to render.  private RasterLayer _rasterLayer;   public RasterRgbRenderer()  {  InitializeComponent();   // Call a function to create the map, add a raster layer, and fill UI controls.  _ = Initialize();  }   private async Task Initialize()  {  // Create a map with a streets basemap.  Map map = new Map(BasemapStyle.ArcGISStreets);   // Get the file name for the local raster dataset.  string filepath = GetRasterPath();   // Load the raster file  Raster rasterFile = new Raster(filepath);   // Create a new raster layer to show the image.  _rasterLayer = new RasterLayer(rasterFile);   try  {  // Once the layer is loaded, enable the button to apply a new renderer.  await _rasterLayer.LoadAsync();  ApplyRgbRendererButton.IsEnabled = true;   // Create a viewpoint with the raster's full extent.  Viewpoint fullRasterExtent = new Viewpoint(_rasterLayer.FullExtent);   // Set the initial viewpoint for the map.  map.InitialViewpoint = fullRasterExtent;   // Add the layer to the map.  map.OperationalLayers.Add(_rasterLayer);   // Add the map to the map view.  MyMapView.Map = map;   // Add available stretch types to the combo box.  StretchTypeComboBox.Items.Add("Min Max");  StretchTypeComboBox.Items.Add("Percent Clip");  StretchTypeComboBox.Items.Add("Standard Deviation");   // Select "Min Max" as the stretch type.  StretchTypeComboBox.SelectedIndex = 0;   // Create a range of values from 0-255.  List<int> minMaxValues = Enumerable.Range(0, 256).ToList();   // Fill the min and max red combo boxes with the range and set default values.  MinRedComboBox.ItemsSource = minMaxValues;  MinRedComboBox.SelectedValue = 0;  MaxRedComboBox.ItemsSource = minMaxValues;  MaxRedComboBox.SelectedValue = 255;   // Fill the min and max green combo boxes with the range and set default values.  MinGreenComboBox.ItemsSource = minMaxValues;  MinGreenComboBox.SelectedValue = 0;  MaxGreenComboBox.ItemsSource = minMaxValues;  MaxGreenComboBox.SelectedValue = 255;   // Fill the min and max blue combo boxes with the range and set default values.  MinBlueComboBox.ItemsSource = minMaxValues;  MinBlueComboBox.SelectedValue = 0;  MaxBlueComboBox.ItemsSource = minMaxValues;  MaxBlueComboBox.SelectedValue = 255;   // Fill the standard deviation factor combo box and set a default value.  IEnumerable<int> wholeStdDevs = Enumerable.Range(1, 10);  List<double> halfStdDevs = wholeStdDevs.Select(i => (double)i / 2).ToList();  StdDeviationFactorComboBox.ItemsSource = halfStdDevs;  StdDeviationFactorComboBox.SelectedValue = 2.0;  }  catch (Exception e)  {  MessageBox.Show(e.ToString(), "Error");  }  }   private void ApplyRgbRendererButton_Click(object sender, System.Windows.RoutedEventArgs e)  {  // Create the correct type of StretchParameters with the corresponding user inputs.  StretchParameters stretchParameters = null;   // See which type is selected and apply the corresponding input parameters to create the renderer.  switch (StretchTypeComboBox.SelectedValue.ToString())  {  case "Min Max":  // Read the minimum and maximum values for the red, green, and blue bands.  double minRed = Convert.ToDouble(MinRedComboBox.SelectedValue);  double minGreen = Convert.ToDouble(MinGreenComboBox.SelectedValue);  double minBlue = Convert.ToDouble(MinBlueComboBox.SelectedValue);  double maxRed = Convert.ToDouble(MaxRedComboBox.SelectedValue);  double maxGreen = Convert.ToDouble(MaxGreenComboBox.SelectedValue);  double maxBlue = Convert.ToDouble(MaxBlueComboBox.SelectedValue);   // Create an array of the minimum and maximum values.  double[] minValues = { minRed, minGreen, minBlue };  double[] maxValues = { maxRed, maxGreen, maxBlue };   // Create a new MinMaxStretchParameters with the values.  stretchParameters = new MinMaxStretchParameters(minValues, maxValues);  break;   case "Percent Clip":  // Get the percentile cutoff below which values in the raster dataset are to be clipped.  double minimumPercent = MinimumValueSlider.Value;   // Get the percentile cutoff above which pixel values in the raster dataset are to be clipped.  double maximumPercent = MaximumValueSlider.Value;   // Create a new PercentClipStretchParameters with the inputs.  stretchParameters = new PercentClipStretchParameters(minimumPercent, maximumPercent);  break;   case "Standard Deviation":  // Read the standard deviation factor (the number of standard deviations used to define the range of pixel values).  double standardDeviationFactor = Convert.ToDouble(StdDeviationFactorComboBox.SelectedValue);   // Create a new StandardDeviationStretchParameters with the selected number of standard deviations.  stretchParameters = new StandardDeviationStretchParameters(standardDeviationFactor);  break;  }   // Create an array to specify the raster bands (red, green, blue).  int[] bands = { 0, 1, 2 };   // Create the RgbRenderer with the stretch parameters created above, then apply it to the raster layer.  RgbRenderer rasterRenderer = new RgbRenderer(stretchParameters, bands, null, true);  _rasterLayer.Renderer = rasterRenderer;  }   private void StretchTypeComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)  {  // Hide all UI controls for the input parameters.  MinMaxParametersGrid.Visibility = System.Windows.Visibility.Collapsed;  PercentClipParametersGrid.Visibility = System.Windows.Visibility.Collapsed;  StdDeviationParametersGrid.Visibility = System.Windows.Visibility.Collapsed;   // See which type was selected and show the corresponding input controls.  switch (StretchTypeComboBox.SelectedValue.ToString())  {  case "Min Max":  MinMaxParametersGrid.Visibility = System.Windows.Visibility.Visible;  break;   case "Percent Clip":  PercentClipParametersGrid.Visibility = System.Windows.Visibility.Visible;  break;   case "Standard Deviation":  StdDeviationParametersGrid.Visibility = System.Windows.Visibility.Visible;  break;  }  }   private static string GetRasterPath()  {  return DataManager.GetDataFolder("7c4c679ab06a4df19dc497f577f111bd", "raster-file", "Shasta.tif");  }  } }