LerpImages

Header:	AVL.h
Namespace:	avl

Interpolates two images linearly pixel by pixel.

Syntax

void avl::LerpImages
(
	const avl::Image& inImage1,
	const avl::Image& inImage2,
	atl::Optional<const avl::Region&> inRoi,
	float inLambda,
	avl::Image& outImage
)

Parameters

Name	Type	Range	Default	Description
inImage1	const Image&			First input image
inImage2	const Image&			Second input image
inRoi	Optional<const Region&>		NIL	Range of pixels to be processed
inLambda	float	0.0 - 1.0	0.5f	Interpolation between the input images where 0.0 value is equal to inImage1 and 1.0 to inImage2
outImage	Image&			Output image

In-place Processing

This function supports in-place data processing - you can pass the same reference to inImage1 and outImage, inImage2 and outImage

Description

The operation computes the linear interpolation of two images. Each pixel of the output image is computed as follows. \[ outImage[i,j] = (1-inLambda) \cdot inImage0[i,j] + inLambda \cdot inImage1[i,j] \]

In multichannel (color) images each pixel channel is processed separately.

The operation requires that the images being processed have equal format and dimensions, otherwise an error with appropriate description occurs. To obtain an image of desired dimensions one can use ResizeImage or CropImage filter. To alter the pixel type of an image one can use ConvertPixelType filter. ConvertToMultichannel and AverageChannels filters allow to alter the number of image channels.

Hardware Acceleration

This operation is optimized for SSE2 technology for pixels of types: UINT8, SINT16, REAL.

This operation is optimized for AVX2 technology for pixels of types: UINT8, SINT16, REAL.

This operation is optimized for NEON technology for pixels of types: UINT8, SINT8, UINT16, SINT16, SINT32.

This operation supports automatic parallelization for multicore and multiprocessor systems.

Errors

List of possible exceptions:

Error type	Description
DomainError	Image formats are not the same in LerpImages.
DomainError	Image sizes are not equal in LerpImages.
DomainError	Region exceeds an input image in LerpImages.