TWAIN ActiveX/Plug-in Windows/Mac HTTP Control/SDK

IsBlankImage Method

Detects whether an image is blank.

ActiveX Edition	Plug-in Edition	Mac Edition
Since V5.2	Since V5.2	Since V6.4

Boolean ObjectName. IsBlankImage(Short sImageIndex)

Short sImageIndex: specifies the index of image in buffer. The index is 0-based.

Boolean.

TRUE indicates that the image is blank. FALSE indicates that the image is not blank.

When an error occurs and IfThrowException property is TRUE, an exception will be thrown.

When FALSE is returned or an exception is thrown, check ErrorCode property and ErrorString property for error information.

If you would like to check whether a certain area on a selected image is blank, you can use the IsBlankImageEx method.