FilterAutoLevels  Method

Description         This method will adjust the input image’s levels automatically. AutoLevels filtering clips iPercent percent of colors (iPercent/2 from darkest colors and iPercent/2 from lightest colors) and then stretches the image’s histogram to the 0..255 range. AutoLevels filtering filters the color channels of the image separately. This method works for only 8 and 24 bit per pixel images.

Examples

Description: macskaauto                                          Description: dwfasdf

The original 180 x 210 pixel image and the AutoLeveled image with iPercent = 10 parameter value.

Syntax                 RetVal = [BiFilter.]FilterAutoLevels  hDib iPercent 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.

                            iPercent                  short                Percent of colors to be clipped.

                            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