ChangeHeight Method

Summary

Increases or decreases the allocated height of an image.

Syntax

Objective-C

C++

Java

public void ChangeHeight( 
   int height 
)

Public Sub ChangeHeight( _ 
   ByVal height As Integer _ 
)

- (BOOL)changeHeight:(NSInteger)newHeight error:(NSError **)error

public void changeHeight(int height)

public: 
void ChangeHeight(  
   int height 
)

Parameters

height
New height in pixels.

Remarks

You can use this method in a callback routine to adjust the allocation when loading an image of unknown height.

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 LeadtoolsExamples.Common; 
using Leadtools.Svg; 
 
public void ChangeHeightExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   // Load the image 
   RasterImage image = codecs.Load(Path.Combine(ImagesPath.Path, "IMAGE1.CMP")); 
 
   Console.WriteLine(string.Format("Height: {0}", image.Height)); 
   image.ChangeHeight(image.Height / 2); 
   Console.WriteLine(string.Format("Height: {0}", image.Height)); 
 
   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 ChangeHeightExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   ' Load the image 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")) 
 
   Console.WriteLine(String.Format("Height: {0}", image.Height)) 
   image.ChangeHeight(image.Height \ 2) 
   Console.WriteLine(String.Format("Height: {0}", image.Height)) 
 
   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#[Silverlight C# Example] 
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 ChangeHeightExample(RasterImage image) 
{ 
   Debug.WriteLine(string.Format("Height: {0}", image.Height)); 
   int newHeight = image.Height / 2; 
   image.ChangeHeight(newHeight); 
   Debug.WriteLine(string.Format("Height: {0}", image.Height)); 
   Debug.Assert(image.Height == newHeight); 
 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
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 ChangeHeightExample(ByVal image As RasterImage) 
   Debug.WriteLine(String.Format("Height: {0}", image.Height)) 
   Dim newHeight As Integer = image.Height / 2 
   image.ChangeHeight(newHeight) 
   Debug.WriteLine(String.Format("Height: {0}", image.Height)) 
   Debug.Assert(image.Height = newHeight) 
 
   image.Dispose() 
End Sub

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 20.0.2020.4.2

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies