RegionContains Method

Summary

Determines whether the specified pixel is in the image region.

Syntax

Objective-C

C++

Java

public bool RegionContains( 
   int row, 
   int col 
)

Public Function RegionContains( _ 
   ByVal row As Integer, _ 
   ByVal col As Integer _ 
) As Boolean

- (BOOL)regionContainsPoint:(LeadPoint)point

public boolean regionContains(int row, int col)

public: 
bool RegionContains(  
   int row, 
   int col 
)

Parameters

row
The row number of the pixel.

col
The column number of the pixel.

Return Value

true if the specified pixel is in the region; false, otherwise.

Remarks

This method uses image coordinates to specify the pixel. Therefore, you must account for the view perspective of the image.

For more information, refer to Working with the Existing Region.

Example

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 Leadtools.Svg; 
 
 
public void RegionContainsExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_RegionContains.bmp"); 
 
	// Load the image 
	RasterImage image = codecs.Load(srcFileName); 
 
	// Add an ellipse inside a rectangle region to the image 
 
	LeadRect rc = new LeadRect(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3); 
	image.AddEllipseToRegion(null, rc, RasterRegionCombineMode.Set); 
 
	// Loop through the image and turn all pixels in the region to double intensity 
	for (int y = 0; y < image.Height; y++) 
	{ 
		for (int x = 0; x < image.Width; x++) 
		{ 
			if (image.RegionContains(y, x)) 
			{ 
				RasterColor clr = image.GetPixelColor(y, x); 
				clr = new RasterColor(clr.R * 2, clr.G * 2, clr.B * 2); 
				image.SetPixelColor(y, x, clr); 
			} 
		} 
	} 
 
	codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

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 RegionContainsExample() 
   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_RegionContains.bmp") 
 
   ' Load the image 
   Dim image As RasterImage = codecs.Load(srcFileName) 
 
   ' Add an ellipse inside a rectangle region to the image 
 
   Dim rc As LeadRect = New LeadRect(image.Width \ 3, image.Height \ 3, image.Width \ 3, image.Height \ 3) 
   image.AddEllipseToRegion(Nothing, rc, RasterRegionCombineMode.Set) 
 
   ' Loop through the image and turn all pixels in the region to double intensity 
   Dim y As Integer = 0 
   Do While y < image.Height 
      Dim x As Integer = 0 
      Do While x < image.Width 
         If image.RegionContains(y, x) Then 
            Dim clr As RasterColor = image.GetPixelColor(y, x) 
            clr = New RasterColor(clr.R * 2, clr.G * 2, clr.B * 2) 
            image.SetPixelColor(y, x, clr) 
         End If 
         x += 1 
      Loop 
      y += 1 
   Loop 
 
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24) 
 
   image.Dispose() 
   codecs.Dispose() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 21.0.2021.7.2

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies