ClearBackground Method

Description

Set background to white

Syntax

Visual Basic
Public Sub ClearBackground( _ Optional ByVal ThrLevel As Double = 30 _ )

Parameters

ThrLevel: Background threshold level (range 0-100)

Remarks

Scanning of documents with white background as grayscale and color typically produces off-white background on the scanned image. This method sets all pixels brighter than the specified threshold to pure white to bring visually quality closer to the original document.

Recommended ThrLevel is 30. Higher number causes more pixels to be set to white.