Creates a region of pixels with values that fall within a range defined by the value of a specific pixel and a lower and upper tolerance value but are not equal to the borderColor.
public void AddBorderToRegion(
int left,
int top,
RasterColor borderColor,
RasterColor lowerToleranceColor,
RasterColor upperToleranceColor,
RasterRegionCombineMode combineMode
)
Public Sub AddBorderToRegion( _
ByVal left As Integer, _
ByVal top As Integer, _
ByVal borderColor As RasterColor, _
ByVal lowerToleranceColor As RasterColor, _
ByVal upperToleranceColor As RasterColor, _
ByVal combineMode As RasterRegionCombineMode _
)
- (BOOL)addBorderToRegion:(NSInteger)left
top:(NSInteger)top
borderColor:(LTRasterColor *)borderColor
lowerToleranceColor:(LTRasterColor *)lowTolColor
upperToleranceColor:(LTRasterColor *)upTolColor
combineMode:(LTRasterRegionCombineMode)combineMode
error:(NSError **)error
public void addBorderToRegion(
int left,
int top,
RasterColor borderColor,
RasterColor lowerToleranceColor,
RasterColor upperToleranceColor,
RasterRegionCombineMode combineMode
)
public:
void AddBorderToRegion(
int left,
int top,
RasterColor borderColor,
RasterColor lowerToleranceColor,
RasterColor upperToleranceColor,
RasterRegionCombineMode combineMode
)
left
X coordinate of a point. The color of the specified point will be used to set the region.
top
Y coordinate of a point. The color of the specified point will be used to set the region.
borderColor
Border color.
lowerToleranceColor
Lower tolerance values that set the lower stopping point for the region.
upperToleranceColor
Upper tolerance values that set the lower stopping point for the region.
combineMode
The action to take regarding the existing image region, if one is defined.
For color bitmaps:
If the value of the pixel at (x, y) is (125, 125, 125) and lowerToleranceColor is (20,30,15), then the lower stopping point is (105, 95, 110). If upperToleranceColor is (20,30,15), then the upper stopping point is (145,155,140). In this case, the pixels with values between (105,95,110) and (145,155,140) are non-border pixels and will be included in the region. Any pixel with a value outside this range or equal to borderColor is considered a border pixel.
For gray scale bitmaps:
The minimum channel tolerance value of lowerToleranceColor will be used to set the lower stopping point, and the minimum channel tolerance value of upperToleranceColor will be used to set the upper stopping point. For example, if the value of the pixel at (x, y) is (125, 125, 125) and lowerToleranceColor is (20,30,15), the smallest value of the triplet (15) will be used to create the lower stopping point of (110,110,110). If upperToleranceColor is (10,25,20), the smallest value of that triplet (10) will be used to create the upper stopping point of (135,135,135). In this case, the pixels with values between (110, 110, 110) and (135,135,135) are non-border pixels and will be included in the region. Any pixel with a value outside this range or equal to borderColor is considered a border pixel.
This method supports signed/unsiged data images.
To update an existing region, specify how the new region is to be combined with the existing one using the combineMode parameter. For more information, refer to RasterRegionCombineMode.
The AddBorderToRegion function can use the Extended Grayscale mask. For more information, refer to Grayscale Images.
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.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using LeadtoolsExamples.Common;
using Leadtools.Svg;
public void AddBorderToRegionExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
string destFileName = Path.Combine(ImagesPath.Path, "Image1_AddBorderToRegion.bmp");
// Load the image
RasterImage image = codecs.Load(srcFileName);
// Posterize the image to decrease the number of colors
PosterizeCommand posterize = new PosterizeCommand(16);
posterize.Run(image);
// Specify a pixel in the upper left of the displayed image
LeadPoint pt = new LeadPoint(image.ImageWidth / 8, image.ImageHeight / 8);
// Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt);
// Create a border region at this point
RasterColor borderColor = image.GetPixelColor(pt.Y, pt.X);
RasterColor lowerColor = new RasterColor(20, 30, 150);
RasterColor upperColor = new RasterColor(15, 30, 10);
image.AddBorderToRegion(pt.X, pt.Y, borderColor, lowerColor, upperColor, RasterRegionCombineMode.Set);
// Fill the region with blue
FillCommand fill = new FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Blue));
fill.Run(image);
// Save the image
codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24);
image.Dispose();
codecs.Dispose();
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Controls
Imports Leadtools.Dicom
Imports Leadtools.Drawing
Imports Leadtools.Svg
Public Sub AddBorderToRegionExample()
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_AddBorderToRegion.bmp")
' Load the image
Dim image As RasterImage = codecs.Load(srcFileName)
' Posterize the image to decrease the number of colors
Dim posterize As PosterizeCommand = New PosterizeCommand(16)
posterize.Run(image)
' Specify a pixel in the upper left of the displayed image
Dim pt As LeadPoint = New LeadPoint(image.ImageWidth \ 8, image.ImageHeight \ 8)
' Adjust the point in case the view perspective is not TopLeft
pt = image.PointToImage(RasterViewPerspective.TopLeft, pt)
' Create a border region at this point
Dim borderColor As RasterColor = image.GetPixelColor(pt.Y, pt.X)
Dim lowerColor As RasterColor = New RasterColor(20, 30, 150)
Dim upperColor As RasterColor = New RasterColor(15, 30, 10)
image.AddBorderToRegion(pt.X, pt.Y, borderColor, lowerColor, upperColor, RasterRegionCombineMode.Set)
' Fill the region with blue
Dim fill As FillCommand = New FillCommand(RasterColor.FromKnownColor(RasterKnownColor.Blue))
fill.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
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