avrgIm

avrgIm ( integer Input1, integer Input2, integer Output )

Use this function to find an average value of two images on a pixel-by-pixel basis. The following formula is used for calculating the intensity of a target pixel:



If the input images differ in types, they will be automatically converted to the type that forces conformity between the images. If the images or selections are different sizes, one or both of them will be clipped to match the minimal horizontal and vertical dimension of the images or selected regions of interests.

Parameters

Input1

An integer between 0 and 116 specifying the frame number of the first input image. A value of 0 represents the DMA memory buffer of the video device. Values in the range of 100-116 correspond to hidden frames.

Input2

An integer between 0 and 116 specifying the frame number of the second input image. A value of 0 represents the DMA memory buffer of the video device. Values in the range of 100-116 correspond to hidden frames.

Output

An integer between 1 and 116 specifying the output image frame number. Values in the range of 100-116 correspond to hidden frames.

Error flags

ERR_OK

The flag set if successful.

ERR_FAILED

The flag set if failed.

Example

The following set of statements displays a live image merged with a sample image by averaging both of them:

setCurDir("samples")

loadIm(100,"sample14.iwd")

do

grabIm (0)

avrgIm(0, 100, 1)

loop while getError()=ERR_OK