In This Topic ▼

LBitmap::GetRgnPerimeterLength

#include "ltwrappr.h"

virtual L_INT LBitmap::GetRgnPerimeterLength (pXForm, puLength, uFlags = 0)

pRGNXFORM pXForm;	pointer to a coordinate-translation structure
L_SIZE_T * puLength;	pointer to a variable to be updated
L_UINT32 uFlags;	flags

Computes the length of the perimeter of a region.

Parameter	Description
pXForm	Pointer to an RGNXFORM structure that LEADTOOLS uses to translate between display coordinates and bitmap coordinates.
	If you specify NULL in this parameter, the scalar fields default to 1, the offsets default to 0, and the view perspective defaults to the bitmap's view perspective.
puLength	Address of a variable to be updated with the perimeter length of the region. The length is expressed in pixels.
uFlags	Reserved for future use. Must be 0.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function works only on bitmaps having a region. If a bitmap does not have a region the function returns the error: Not Initialized.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.

This function 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 toolkits.

This function supports signed data images.

Required DLLs and Libraries

LTIMGEFX

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

See Also

Functions:	LBitmap::AddShadow, LBitmap::AllocFTArray, LBitmap::ChangeHueSatInt, LBitmap::ColorReplace, LBitmap::ColorThreshold, LBitmap::DFT, LBitmap::DirectionEdgeStatistical, LBitmap::FFT, LBitmap::FreeFTArray, LBitmap::FrqFilter, LBitmap::FrqFilterMask, LBitmap::FTDisplay, LBitmap::GetStatisticsInfo, LBitmap::GetFeretsDiameter, LBitmap::GetObjectInfo, LBitmap::GetRgnContourPoints, LBitmap::MathFunction, LBitmap::RevEffect, LBitmap::Segment, LBitmap::SubtractBackground, LBitmap::UserFilter, LBitmap::DirectionEdgeStatistical2
Topics:	Working with the Existing Bitmap Region
	Raster Image Functions: Creating and Using a Region
	Raster Image Functions: Analysis: Object or Region Analysis

Example

L_INT LBitmap__GetRgnPerimeterLengthExample(LBitmap *pLeadBitmap)  
 
{ 
   L_INT nRet; 
   RECT   rcRect;  
   L_SIZE_T    uPerimeter;  
 
   rcRect.top = pLeadBitmap->GetHeight ()/3;  
   rcRect.bottom = pLeadBitmap->GetHeight ()*2/3;  
   rcRect.left = pLeadBitmap->GetWidth ()/3;  
   rcRect.right = pLeadBitmap->GetWidth ()*2/3;  
    
   nRet =pLeadBitmap->Region()->SetRgnEllipse (&rcRect); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =pLeadBitmap->GetRgnPerimeterLength(NULL, &uPerimeter); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}

Download our FREE evaluation

Help Version 20.0.2020.4.5

LEADTOOLS Raster Imaging C++ Class Library Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Quick Reference

Tutorials

Classes and Member Functions

Summary of Features