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PointFromImage Method

Summary

Translates a point (x,y) from this RasterImage view perspective to the specified view perspective.

Syntax
C#
VB
Java
Objective-C
C++
Public Function PointFromImage( _ 
   ByVal viewPerspective As RasterViewPerspective, _ 
   ByVal pt As LeadPoint _ 
) As LeadPoint 
- (LeadPoint)pointFromImage:(LTRasterViewPerspective)viewPerspective  
                sourcePoint:(LeadPoint)src 
public LeadPoint pointFromImage( 
  RasterViewPerspective viewPerspective,  
  LeadPoint pt 
) 

Parameters

viewPerspective
Destination view perspective to which the point should be translated.

pt
The point to translate.

Return Value

The translated point.

Remarks

For more information, refer to Accounting for View Perspective.

For more information, refer to Changing Image Coordinates.

Example

This example finds out where the origin of the image should be. Then it converts a known point to bitmap coordinates.

C#
VB
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 PointFromImageExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   // Load an image that has BottomLeft ViewPerspective 
   RasterImage image = codecs.Load(Path.Combine(ImagesPath.Path, "ULAY1.BMP")); 
 
   LeadPoint ImagePoint = new LeadPoint(0, 0); 
   ImagePoint = image.PointFromImage(RasterViewPerspective.TopLeft, ImagePoint); 
   Console.WriteLine(string.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)); 
 
   ImagePoint.X = 0; 
   ImagePoint.Y = 0; 
   ImagePoint = image.PointToImage(RasterViewPerspective.TopLeft, ImagePoint); 
   Console.WriteLine(string.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)); 
 
   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 PointFromImageExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   ' Load an image that has BottomLeft ViewPerspective 
   Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ULAY1.BMP")) 
 
   Dim ImagePoint As LeadPoint = New LeadPoint(0, 0) 
   ImagePoint = image.PointFromImage(RasterViewPerspective.TopLeft, ImagePoint) 
   Console.WriteLine(String.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)) 
 
   ImagePoint.X = 0 
   ImagePoint.Y = 0 
   ImagePoint = image.PointToImage(RasterViewPerspective.TopLeft, ImagePoint) 
   Console.WriteLine(String.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)) 
 
   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 PointFromImageExample(RasterImage image) 
{ 
   // image should be an image that has BottomLeft ViewPerspective (ulay1.bmp) 
 
   LeadPoint ImagePoint = new LeadPoint(0, 0); 
   ImagePoint = image.PointFromImage(RasterViewPerspective.TopLeft, ImagePoint); 
   Debug.WriteLine(string.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)); 
 
   ImagePoint.X = 0; 
   ImagePoint.Y = 0; 
   ImagePoint = image.PointToImage(RasterViewPerspective.TopLeft, ImagePoint); 
   Debug.WriteLine(string.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)); 
 
   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 PointFromImageExample(ByVal image As RasterImage) 
   ' image should be an image that has BottomLeft ViewPerspective (ulay1.bmp) 
 
   Dim ImagePoint As LeadPoint = New LeadPoint(0, 0) 
   ImagePoint = image.PointFromImage(RasterViewPerspective.TopLeft, ImagePoint) 
   Debug.WriteLine(String.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)) 
 
   ImagePoint.X = 0 
   ImagePoint.Y = 0 
   ImagePoint = image.PointToImage(RasterViewPerspective.TopLeft, ImagePoint) 
   Debug.WriteLine(String.Format("{0},{1}", ImagePoint.X, ImagePoint.Y)) 
 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

Help Version 20.0.2019.9.19
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