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DifferenceImage
Computes the non-negative distances between corresponding pixel values.
Syntax
void avl::DifferenceImage ( const avl::Image& inImage1, const avl::Image& inImage2, atl::Optional<const avl::Region&> inRoi, avl::Image& outImage )
Parameters
| Name | Type | 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 |
 |
outImage | Image& | Output image |
Description
The operation computes the absolute difference between images. Each outImage pixel is equal to the absolute value
of difference between corresponding pixels of the input images.
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.
Examples
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DifferenceImage performed on the sample images.
In-place Processing
This function supports in-place data processing - you can pass the same reference to inImage1 and outImage, inImage2 and outImage
Hardware Acceleration
This operation is optimized for SSE2 technology for pixels of types: UINT8, SINT8, UINT16, SINT16, REAL.
This operation supports automatic parallelization for multicore and multiprocessor systems.
Errors
| Error type | Description |
|---|---|
| DomainError | Image sizes are not equal in DifferenceImage. |
| DomainError | Image formats are not the same in DifferenceImage. |
