'Declaration
 
Public Overloads Shared Sub Blend( _
   ByVal page As ImGearRasterPage, _
   ByVal left As Integer, _
   ByVal top As Integer, _
   ByVal pageToBlendWith As ImGearRasterPage, _
   ByVal weight As Double, _
   ByVal channelsRange As ImGearChannelRange _
) 

'Usage
 
Dim page As ImGearRasterPage
Dim left As Integer
Dim top As Integer
Dim pageToBlendWith As ImGearRasterPage
Dim weight As Double
Dim channelsRange As ImGearChannelRange
 
ImGearRasterProcessing.Blend(page, left, top, pageToBlendWith, weight, channelsRange)

public static void Blend( 
   ImGearRasterPage page,
   int left,
   int top,
   ImGearRasterPage pageToBlendWith,
   double weight,
   ImGearChannelRange channelsRange
)

public: static void Blend( 
   ImGearRasterPage* page,
   int left,
   int top,
   ImGearRasterPage* pageToBlendWith,
   double weight,
   ImGearChannelRange channelsRange
) 

public:
static void Blend( 
   ImGearRasterPage^ page,
   int left,
   int top,
   ImGearRasterPage^ pageToBlendWith,
   double weight,
   ImGearChannelRange channelsRange
) 

Parameters

page

Page to process.

left

Left margin of blended image.

top

Top margin of blended image.

pageToBlendWith

Image to blend with page.

weight

A value from 0 to 100 defining the % weight of the pageToBlendWith image to be blended.

channelsRange

Channel range to process.

This method blends the specified channels of page with corresponding channels of pageToBlendWith, using the following formula:

pagePixel = (pagePixel * (100.0 - weight) + pageToBlendPixel * weight) / 100.0

The method validates input pages for further processing according to following logics:

• This method is applicable to any colorspace, but both images must have the same base colorspace (i.e. upon validation of input images will be considered color channels only - Alpha or Extra channels will be ignored. So, for example, any combination of pages with RGB(A/Ex) colorspaces (e.g. RGB and RGBA) are valid input parameters).
• This method is applicable to any supported by ImageGear channel depth for given colorspace, but channel depths of both images must be the same.

The method processes the input pages according to following logics:

• This method processes only specified channels range of input pages. In order to process all image channels, use another overload Blend(ImGearRasterPage,Int32,Int32,ImGearRasterPage,Double).
• The method blends minimal number of channels, determined by channelsRange and channels count between the images. The remaining out-of-range channels, if any, will not be considered for blending, and:
  • If page has more channels than specified by channelsRange, they will remain intact.
  • If pageToBlendWith has more channels than specified by channelsRange, they will be ignored.
• This method does not not provide any special handling for the Alpha channel (i.e. it processes it as ordinary color channel), please use BlendWithAlpha method to blend images using the Alpha channel.

Reference

ImGearRasterProcessing Class
ImGearRasterProcessing Members
Overload List
BlendWithAlpha Method
ImGearRasterPage Class
ImGearChannelRange Structure