IPblend

Synopsis

perform alpha or compositing blend of two ip_Images

Input Port

&in_image1	ip_Image
&in_image2	ip_Image
&in_image3	ip_Image

Parameters

none

Output Port

dst	ip_Image_Out
TmpField	IPfld
obj	output renderable object

Description

IPblend performs a pixel-by-pixel composition of two images, using an alphamask image for the blending. The equation used to composite the images is:

out pixel = (alpha for this pixel) * (in1 pixel) + (1.0 - (alpha for this pixel))

* (in2 pixel)

Input

&in_image1

&in_image2

The inputs are references to two ip_Images. The ip_Images can have multiple bands, and any data type, but must match in bands, type, and size.

&in_image3

This input is the alphamask ip_Image. Byte, float, or short images can be used as the blending function. Byte or short images will be scaled to vary from 0 to 1; float images will be assumed to be in that range. This alphamask image must be the same size as the two input ip_Images.

Parameters

Output Port

dst

The output is a new ip_Image of the same dimensions, type, and number of bands as the input ip_Images. Its data values represent the alpha blending of the two input ip_Images.

TmpField

This output is the ip_Image converted back into an AVS/Express field.

obj

This is a renderable version of the output.

Example

Libraries.Examples.Image_Processing.IPblend

File

v/ip.v

See also

Not applicable.