LBitmap::ObjectCounter

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#include "ltwrappr.h"

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.

See Also

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

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;
}