AddColorRgbRangeToRegion Method

Creates or updates the image region by adding a region that consists of all the pixels that fall in the given RGB color range.

Syntax

C#
Visual Basic
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public void AddColorRgbRangeToRegion( 
   RasterColor lowerColor,
   RasterColor upperColor,
   RasterRegionCombineMode combineMode
)

'Declaration
 
Public Sub AddColorRgbRangeToRegion( _
   ByVal lowerColor As RasterColor, _
   ByVal upperColor As RasterColor, _
   ByVal combineMode As RasterRegionCombineMode _
)

'Usage
 
Dim instance As RasterImage
Dim lowerColor As RasterColor
Dim upperColor As RasterColor
Dim combineMode As RasterRegionCombineMode
 
instance.AddColorRgbRangeToRegion(lowerColor, upperColor, combineMode)

public void AddColorRgbRangeToRegion( 
   RasterColor lowerColor,
   RasterColor upperColor,
   RasterRegionCombineMode combineMode
)

-(BOOL)addColorRgbRangeToRegion:(LTRasterColor*)lowerColor 
                     upperColor:(LTRasterColor*)upperColor 
                    combineMode:(LTRasterRegionCombineMode)combineMode 
                          error:(NSError**)outError;

public void addColorRgbRangeToRegion(
  RasterColor lowerColor, 
  RasterColor upperColor, 
  RasterRegionCombineMode combineMode
)

 function Leadtools.RasterImage.AddColorRgbRangeToRegion( 
   lowerColor ,
   upperColor ,
   combineMode 
)

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.

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.

This method supports signed/unsigned data images.

The AddColorRgbRangeToRegion function can use the Extended Grayscale mask. For more information, refer to Grayscale Images.

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.

In the Document and Medical toolkits, the COLORREF value can represent a 16 bit grayscale value if RasterImage is a 12 or 16-bit grayscale bitmap. To avoid confusion with an RGB value, set the COLORREF_GRAY16 mask (0x04000000). In this case (0x0400YYYY), the lower 16 bits (0xYYYY) of the COLORREF value represent the 16-bit grayscale value. (0x0400FFFF is 16-bit white and 0x04000000 is 16-bit black.) This is not a standard Windows value. Therefore, although LEADTOOLS methods will recognize a COLORREF having this format, but Windows methods will not.

Example

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.WinForms
Imports Leadtools.Dicom
Imports Leadtools.Drawing

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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.WinForms;
using Leadtools.Dicom;
using Leadtools.Drawing;

      
public void AddColorRgbRangeToRegionExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
   string destFileName = Path.Combine(ImagesPath.Path, "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();
}

RasterImageExamples.prototype.AddColorRgbRangeToRegionExample = function ( ) 
{
   Tools.SetLicense ( ) ;

   with ( Leadtools ) 
   {
      with ( Leadtools.Codecs ) 
      {
         var codecs = new RasterCodecs();

         var srcFileName = "Assets\\Image1.cmp";
         var destFileName = "Image1_AddColorRgbRangeToRegion.bmp";
         var image ;

         // Load the image
         return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile))
         })
         .then(function (img) {
            image = img;

            // Add the region
            var lowerColor = RasterColorHelper.create(0, 1, 0);
            var upperColor = RasterColorHelper.create(0, 255, 0);

            image.addColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.set);

            // Draw something on the image
            var command = new Leadtools.ImageProcessing.Color.InvertCommand();

            command.run(image);

            // Save the image
            return Tools.AppLocalFolder().createFileAsync(destFileName)
         })
         .then(function (saveFile) {
            var saveStream = LeadStreamFactory.create(saveFile);
            return codecs.saveAsync(image, saveStream, RasterImageFormat.bmp, 24)
         })
         .then(function () {

            image.close ();
            codecs.close();
         });
      }
   }
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;

      
public async Task AddColorRgbRangeToRegionExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string destFileName = @"Image1_AddColorRgbRangeToRegion.bmp";

   // Load the image
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Add the region
   RasterColor lowerColor = RasterColorHelper.Create(0, 1, 0);
   RasterColor upperColor = RasterColorHelper.Create(0, 255, 0);

   image.AddColorRgbRangeToRegion(lowerColor, upperColor, RasterRegionCombineMode.Set);

   // Draw something on the image
   InvertCommand command = new InvertCommand();
   command.Run(image);

   // Save the image
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   ILeadStream saveStream = LeadStreamFactory.Create(saveFile);
   await codecs.SaveAsync(image, saveStream, RasterImageFormat.Bmp, 24);

   image.Dispose();
   codecs.Dispose();
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Dicom;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Examples;
using Leadtools.Windows.Media;

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();
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Dicom
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Windows.Media

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

Requirements

Target Platforms

Reference

RasterImage Class
RasterImage Members
Gray Scale Images
Introduction: Bits Per Pixel and Related Ideas
Using Color Values in LEADTOOLS