Thinning (binary)

#include "BIFILTER.H"

 

HANDLE CALLBACK BinaryThinning(                 HDIB  hDIB,
BOOL     BackGrndisBlack,
int            iShowProgress,
HWND    hParent)

Description

This function will morphologically thin the binary image. The function works for only 1 bit per pixel images. The binary thinning operation is used to reduce the geometric size of an object. Usually this operation is used iteratively until the desired image is obtained or until no further changes occur in the thinned image.

Examples

Description: binkep8                                       Description: kockathinned

The original 46 x 31 pixel image and the thinned image of the object processed by the thinning operation 3 times iteratively.

Parameters

HDIB

hDIB

Handle of the DIB to filter.

BOOL

BackGrndisBlack

This parameter specifies the color of the object and background.

int

iShowProgress

This parameter specifies the displaying of the progressbar and the preview dialog.

Available values:

DISPLAY_NONE (0)      -     The progressbar and the preview dialog will not display before filtering.

DISPLAY_PROGRESS (1) -The progressbar will display during filtering procedure.

DISPLAY_DIALOG (2) -     The preview dialog will display before filtering. This dialog shows the part of the image before and after filtering.

DISPLAY_BOTH (3)      -     The progressbar and the preview dialog will display.

IMPORTANT: The preview dialog will only display, if there is BiDlgs.dll installed.

HWND

hParent

Handler of the parent window.

Return values

The handle of the new filtered DIB or NULL if an error occurred.

Programming notes

The function will not free the input DIB.

Requirements

Header :    Declared in BIFilter.h; include BIFilter.h.

Library :    Use BIFilter.lib.

DLLs :       BIFilter.dll, BiDlgs.dll.