FilterLaplace

#include "BIFILTER.H"

 

HANDLE CALLBACK FilterLaplace(                  HANDLE          HDIB,
int              iMode,
int              iShowProgress,
HWND     hParent)

Description

This function will filtered the image with the Laplace filter. This function works for only monochrome, 8 bit per bixel and 24 bit per pixel images.

Examples

Description: 8bitgray                                                  Description: macskalaplace8

The original 210 x 180 pixel image and the 8 neighboured Laplace filtered image.

Parameters

HDIB

hDIB

Handle of the DIB to filter.

int

iMode

This parameter specifies the filter matrix.

Available values:

 

LAPLACE_4_NEIGHBOURALL (0)

LAPLACE_4_NEIGHBOURNORTH (1)

LAPLACE_4_NEIGHBOURWEST (2)

 

LAPLACE_8_NEIGHBOURALL (10)

LAPLACE_8_NEIGHBOURNORTH (11)

LAPLACE_8_NEIGHBOURWEST (12)

LAPLACE_8_NEIGHBOURNORTHWEST (13)

LAPLACE_8_NEIGHBOURNORTHEAST (14)

 

See Programming notes below.

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.

Matrix of the Laplace 4 neighbour-all filter:

Matrix of the Laplace 4 and 8 neighbour-north filter:

Matrix of the Laplace 4 and 8 neighbour-west filter:

Matrix of the Laplace 8 neighbour-all filter:

Matrix of the Laplace 8 neighbour-north-west filter:

Matrix of the Laplace 8 neighbour-north-east filter:

Requirements

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

Library :    Use BIFilter.lib.

DLLs :       BIFilter.dll, BiDlgs.dll.