Description This function will filter the image by the nonlinear minimum filter method. This function works for only monochrome, 8 bit per pixel and 24 bit per pixel images. The minimum filter is typically applied to an image to remove positive outlier noise. Minimum filter is defined as:
Minimum(A) = min[A(x + i, y + j)]
where the coordinate (x+i, y+j ) is defined over the image A and the coordinate (i, j) is defined over the N x N size square mask
Examples
Syntax RetVal = [BiFilter.]FilterMinimum hDib N iShowProgress hWnd
Returns RetVal Long The handle of new filtered DIB, 0 if an error occurred, or –1 if the BIFilter.dll does not installed.
Remarks hDIB Long Handle of the image to filter.
N short This parameter specifies the size of the square mask. N cannot be less than 1. See the description and examples above for further information and a possible value.
iShowProgress short 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 BIDlgs32.dll installed.
hWnd Long Handler of the parent window.
See Also