In This Topic ▼

LBitmap::ObjectCounter

#include "ltwrappr.h"

virtual L_INT LBitmap::ObjectCounter(uCount, uFlags = 0)

L_UINT * uCount;	objects count
L_UINT32 uFlags;	flags

Gets the number of black objects in a binary image.

Parameter	Description
uCount	Pointer to a variable to be updated with the number of black objects.
uFlags	Reserved for future use. Must be 0.

Returns

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

Comments

If white objects are on a black image, the colors in the class object's bitmap must be inverted by calling LBitmap::Invert function.

This function only works on 1-bit images.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Required DLLs and Libraries

LTIMGCOR

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.

Example

//This example counts black binary objects in a binary image with a white background //The objects can be of any size or shape //The callback member function is used to show the length of each removed rake //The callback member function does NOT receive a Windows region.

class LObjectCounterBitmap : public LBitmap 
{ 
public: 
   LObjectCounterBitmap(); 
   ~LObjectCounterBitmap(); 
 
   virtual L_INT LObjectCounterBitmap::ObjectCounterCallBack(L_RECT rect 
      ); 
 
}; 
LObjectCounterBitmap::LObjectCounterBitmap() 
{ 
} 
 
LObjectCounterBitmap::~LObjectCounterBitmap() 
{ 
} 
 
L_INT LObjectCounterBitmap::ObjectCounterCallBack(L_RECT rect 
                                            ) 
{ 
 
 
   CString strMsg; 
 
   strMsg.Format( 
      TEXT("Region Bounds: left=%d, right=%d, top=%d, bottom=%d \n count=%d"), 
      rect.left, rect.right, rect.top, rect.bottom 
      ); 
 
   OutputDebugString(strMsg); 
 
   return SUCCESS; 
} 
 
L_INT LBitmap__ObjectCounterExample(LBitmapWindow *pBitmapWindow) 
{ 
 
   L_UINT uCount; 
   L_INT nRet; 
   CString strMsg; 
 
 
 
   nRet = pBitmapWindow->ObjectCounter(&uCount, 0); 
 
 
   strMsg.Format( 
      TEXT("The number of Objects is: %d"), 
      uCount 
      ); 
   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

Functions:	LBitmap::DeleteObjectInfo, LBitmap::EndFastMagicWandEngine, LBitmap::ObjectCounterCallback, LBitmap::StartFastMagicWandEngine
Topics:	Raster Image Functions: Image Analysis
	Processing an Image