IsBlankImage Method (ImageEditor)

Visual Basic
C#
Delphi
JScript
C++/CLI

'Declaration
 
Public Function IsBlankImage() As System.Boolean

'Usage
 
Dim instance As ImageEditor
Dim value As System.Boolean
 
value = instance.IsBlankImage()

public System.bool IsBlankImage()

public function IsBlankImage(): System.Boolean;

public function IsBlankImage() : System.boolean;

public:
System.bool IsBlankImage();

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.

Reference

ImageEditor Class
ImageEditor Members