L_BinaryFilterBitmap

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_BinaryFilterBitmap(pBitmap, pFilter)

pBITMAPHANDLE pBitmap;

/* pointer to the bitmap handle */

LPBINARYFLT pFilter;

/* pointer to the binary filter to use */

Imposes a binary filter on a bitmap. This function is available in the Document/Medical Toolkits.

Parameter

Description

pBitmap

Pointer to the bitmap handle that references the bitmap to be affected.

pFilter

Pointer to the binary filter to use. You can use one of the following predefined filters:

 

Value

Meaning

 

BFLT_EROSION_OMNI
BFLT_EROSION_HORZ
BFLT_EROSION_VERT
BFLT_EROSION_DIAG

[#define] Shrinks black objects in the image. The effect is biased in the specified direction.

 

BFLT_DILATION_OMNI
BFLT_DILATION_HORZ
BFLT_DILATION_VERT
BFLT_DILATION_DIAG

[#define] Enlarges black objects in the image. The effect is biased in the specified direction.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

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

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 does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

Required DLLs and Libraries

LTIMG

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

Windows 95 / 98 / Me, Windows 2000 / XP, Windows CE.

See Also

Functions:

L_SharpenBitmap, L_PosterizeBitmap, L_MosaicBitmap, L_EmbossBitmap, L_AverageFilterBitmap, L_MedianFilterBitmap, L_AddBitmapNoise, L_IntensityDetectBitmap, L_SpatialFilterBitmap, L_MaxFilterBitmap, L_MinFilterBitmap, L_OilifyBitmap, L_SolarizeBitmap,

 

L_DlgErosionFilter, L_DlgDilationFilter, L_WindowLevel, L_HolesRemovalBitmapRgn, L_FragmentBitmap, L_HighPassFilterBitmap, L_UnsharpMaskBitmap

Topics:

Raster Image Functions: Filtering Images

 

Removing Noise

Example

For complete sample code, refer to the CHILD.C module of the DEMO example.

/* This example loads a bitmap and dilates its black objects. */
BITMAPHANDLE LeadBitmap;   /* Bitmap handle to hold the loaded image. */
/* Load the bitmap, keeping the bits per pixel of the file */
L_LoadBitmap (TEXT("IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
/* Dilate black objects */
L_BinaryFilterBitmap(&LeadBitmap, BFLT_DILATION_OMNI );