IsBlankImage Method

Description

Is image blank

Syntax

Visual Basic
Public Function IsBlankImage( _ Optional ByVal reserved0 As Long = 0, _ Optional ByVal reserved1 As Double = 0, _ Optional ByVal reserved2 As Double = 0 _ ) As EBoolean

Visual Basic

Public Function IsBlankImage( _
   Optional ByVal reserved0 As Long = 0, _
   Optional ByVal reserved1 As Double = 0, _
   Optional ByVal reserved2 As Double = 0 _
) As EBoolean

Parameters

reserved0: Set to 0
reserved1: Set to 0.0
reserved2: Set to 0.0

Remarks

The image is not blank if it has black pixels after ignoring the following image elements:

Margins - Black pixels inside image margins.

for sides longer than 7 inches the margin is 1 inch wide
for sides between 5 and 7 inches the margin is 0.5 inches wide
for smaller sides the margin size is 0 inch

Noise - Black objects of 5 x 5 pixels and smaller

Object - A single object smaller than 0.5 x 0.5 inch in size

The image should have correct values for HorzDpi and VertDpi properties for proper calculations of margins and object size.

If this method returns false for a blank image, the image has other elements than listed above. Preprocessing this image using CiTools and CiRepair methods could remove such elements.