- lowerColor
- Specifies the minimum (inclusive) R, G and B values. A pixel must have R,G, and B all greater than or equal to lowerColor and less than or equal to upperColor to be included in the region.
- upperColor
- Specifies the maximum (inclusive) R, G and B values. A pixel must have R,G, and B all greater than or equal to lowerColor and less than or equal to upperColor to be included in the region.
- combineMode
- The action to take regarding the existing image region, if one is defined.
Syntax
| Visual Basic (Declaration) | |
|---|---|
Public Sub AddColorRgbRangeToRegion( _ ByVal lowerColor As RasterColor, _ ByVal upperColor As RasterColor, _ ByVal combineMode As RasterRegionCombineMode _ ) | |
| Visual Basic (Usage) |  Copy Code |
|---|---|
Dim instance As RasterImage Dim lowerColor As RasterColor Dim upperColor As RasterColor Dim combineMode As RasterRegionCombineMode instance.AddColorRgbRangeToRegion(lowerColor, upperColor, combineMode) | |
| C# | |
|---|---|
public void AddColorRgbRangeToRegion( RasterColor lowerColor, RasterColor upperColor, RasterRegionCombineMode combineMode ) | |
| C++/CLI | |
|---|---|
public: void AddColorRgbRangeToRegion( RasterColor lowerColor, RasterColor upperColor, RasterRegionCombineMode combineMode ) | |
Parameters
- lowerColor
- Specifies the minimum (inclusive) R, G and B values. A pixel must have R,G, and B all greater than or equal to lowerColor and less than or equal to upperColor to be included in the region.
- upperColor
- Specifies the maximum (inclusive) R, G and B values. A pixel must have R,G, and B all greater than or equal to lowerColor and less than or equal to upperColor to be included in the region.
- combineMode
- The action to take regarding the existing image region, if one is defined.
Example
This example will load an image, adds a region corresponding to all colors that have an rgb that includes green but no red and no blue, run the InvertCommand to show the affected area before saving the image back to disk.
| Visual Basic | Copy Code |
|---|---|
Public Sub AddColorRgbRangeToRegionExample() Dim codecs As RasterCodecs = New RasterCodecs() Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddColorRgbRangeToRegion.bmp") ' Load the image Dim image As RasterImage = codecs.Load(srcFileName) ' Add the region Dim lowerColor As RasterColor = New RasterColor(0, 1, 0) Dim upperColor As RasterColor = New RasterColor(0, 255, 0) image.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.Set) ' Draw something on the image Dim command As InvertCommand = New InvertCommand() command.Run(image) ' Save the image codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) image.Dispose() codecs.Dispose() End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class | |
| C# | Copy Code |
|---|---|
public void AddColorRgbRangeToRegionExample() { RasterCodecs codecs = new RasterCodecs(); string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_AddColorRgbRangeToRegion.bmp"); // Load the image RasterImage image = codecs.Load(srcFileName); // Add the region RasterColor lowerColor = new RasterColor(0, 1, 0); RasterColor upperColor = new RasterColor(0, 255, 0); image.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.Set); // Draw something on the image InvertCommand command = new InvertCommand(); command.Run(image); // Save the image codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); image.Dispose(); codecs.Dispose(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } | |
| SilverlightCSharp | Copy Code |
|---|---|
public void AddColorRgbRangeToRegionExample(RasterImage image, Stream destStream) { // Add the region RasterColor lowerColor = new RasterColor(0, 1, 0); RasterColor upperColor = new RasterColor(0, 255, 0); image.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.Set); // Draw something on the image InvertCommand command = new InvertCommand(); command.Run(image); // Save the image RasterCodecs codecs = new RasterCodecs(); codecs.Save(image, destStream, RasterImageFormat.Png, 24); image.Dispose(); } | |
| SilverlightVB | Copy Code |
|---|---|
Public Sub AddColorRgbRangeToRegionExample(ByVal image As RasterImage, ByVal destStream As Stream) ' Add the region Dim lowerColor As RasterColor = New RasterColor(0, 1, 0) Dim upperColor As RasterColor = New RasterColor(0, 255, 0) image.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.Set) ' Draw something on the image Dim command As InvertCommand = New InvertCommand() command.Run(image) ' Save the image Dim codecs As RasterCodecs = New RasterCodecs() codecs.Save(image, destStream, RasterImageFormat.Png, 24) image.Dispose() End Sub | |
Remarks
This method uses the RGB color model to set a region based on a color range.
To be added to the region a color must fall in the range lowerColor..upperColor. To set a region for all pure red, specify lowerColor and upperColor as follows:
lowerColor RGB(1,0,0)
upperColor RGB(255,0,0)
Note that this would fail to include many colors that look red to the eye (like RGB(255,4,4)).
This method supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical Imaging editions.
To update an existing region, you specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to RasterRegionCombineMode.
For more information, refer to Creating a Region.
For more information, refer to Saving A Region.
For more information, refer to Working with the Existing Region.
Requirements
Target Platforms: Silverlight, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only), Windows Phone 7