FilterPosterizing  Method

Description         This function will posterize the input image to reduce the color levels of the image. Posterizing is a linear quantification of the color values to the specified number of levels. This function works for only 8 bit per pixel and 24 bit per pixel images.


Description: 8bitgray                                          Description: posterized

The original 180 x 210 pixel image and the posterized image to 2 color levels.

Syntax                 RetVal = [BiFilter.]FilterPosterizing  hDib iLevels iShowProgress hWnd

Returns               RetVal                    LONGLONG The handle of new filtered DIB, 0 if an error occurred, or -1 if the BIFilter.dll does not installed.

Remarks             hDib                       LONGLONG Handle of the image to filter.

                            iLevels                    short                The desired number of color levels of the output image.

                            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                     LONGLONG Handler of the parent window.

See Also