InvertWhiteText(ImGearPage,Int32,Int32,Int32,Int32,Int32,Int32) Method
Detects and inverts areas of white text on black background.
'Declaration
Public Overloads Shared Sub InvertWhiteText( _
ByVal As ImGearPage, _
ByVal As Integer, _
ByVal As Integer, _
ByVal As Integer, _
ByVal As Integer, _
ByVal As Integer, _
ByVal As Integer _
)
'Usage
Dim page As ImGearPage
Dim minWidth As Integer
Dim minHeight As Integer
Dim minThickness As Integer
Dim minLetterSize As Integer
Dim maxLetterSize As Integer
Dim maxBorderSize As Integer
ImGearIC.InvertWhiteText(page, minWidth, minHeight, minThickness, minLetterSize, maxLetterSize, maxBorderSize)
Parameters
- page
- 1-bit ImGearPage object to apply the method to.
- minWidth
- Specifies the minimum width for areas that you would like to invert.
- minHeight
- Specifies the minimum height for areas that you would like to invert. For
example, if you set minX = 60 and minY = 20, ImageGear will only invert sections of white text on
black background that have a minimum width of 60 pixels and a minimum height of 20 pixels.
- minThickness
- Specifies the minimum "thickness" of spaces that fall between sections
of text that will be inverted. This minimum value indicates those sections of text to be treated as
one section based on how close they are to one another. As an example, let's say you have three
adjacent sections of white text on black backgrounds that contain the words, "There,"
"is," and "hope." If "There" and "hope" meet your minimum
size requirements they will be inverted. If "is" is below your minimum size requirements,
and you have not set minT, "is" will note be inverted, resulting in "There" and
"hope" looking normal, while "is" remains white text on black background. To
prevent this (if desired), you would need to set minT to a value small enough to include the spaces
before and after the word "is." This way, all the words would be treated as one section
and inverted together.
- minLetterSize
- Specifies the minimum size of the white letters to be inverted.
- maxLetterSize
- Specifies the maximum size of the white letters to be inverted.
- maxBorderSize
- Specifies the size of the maximum border around the letter that will be
inverted along with the letter cell. For example, if width and height of the letter cell are 20 and
30 respectively and maxBorder = 10, then the width and the height of the rectangle that will be
inverted are 40 (10+20+10) and 50 (10+30+10) respectively. Please be careful when setting this
parameter. If it is very large, it is possible that incorrect image areas will be inverted.
// Invert sections of white text on black background in the image using
// a minimum height of 10, width of 30, thickness of 10,
// minimum letter size of 10, maximum letter size of 100, and a maximum
// border of 5.
ImGearIC.InvertWhiteText(igPage, 40, 100, 10, 10, 100, 5);
' Invert sections of white text on black background in the image using
' a minimum height of 10, width of 30, thickness of 10,
' minimum letter size of 10, maximum letter size of 100, and a maximum
' border of 5.
ImGearIC.InvertWhiteText(igPage, 40, 100, 10, 10, 100, 5)