Start » Filter Reference » Image » Image Metrics » ImageDifferenceImage
Advanced| Module: | FoundationBasic |
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Computes an image of differences between a moving pattern and the input image.
| Name | Type | Description | |
|---|---|---|---|
 |
inImage | Image | Input image |
|
inPatternImage | Image | Pattern to be compared with input image |
|
inRoi | Region* | Range of pixels to be processed |
|
inPatternRoi | Region* | Range of pixels in the pattern to be processed |
|
inDistanceMeasure | DistanceMeasure | Measure of distance |
 |
outImage | Image | Output image |
Description
The operation computes the difference between inImage and inPatternImage. The inPatternImage is aligned at each location of the inImage and the similarity between the inPatternImage and the corresponding part of the inImage is estimated using the inDifferenceMeasure as in ImageDifference filter. The result is stored in the pixel of the outImage that corresponds to the location at which the center of inPatternImage was aligned to the inImage.
Examples
 A sample inImage. |
 A sample inPatternImage. |
 The resulting outImage. |
 The locations in the inImage corresponding to the darkest points of the outImage. |
Hardware Acceleration
This operation is optimized for SSE2 technology for pixels of types: UINT8 (for inDistanceMeasure = MeanError).
This operation is optimized for SSE3 technology for pixels of types: UINT16 (for inDistanceMeasure = MeanError), UINT8 (for inDistanceMeasure = MeanSquaredError), REAL.
This operation is optimized for SSE4 technology for pixels of types: INT16, UINT16 (for inDistanceMeasure = MeanSquaredError).
This operation is optimized for AVX2 technology for pixels of types: UINT8, INT16, UINT16, REAL.
This operation is optimized for NEON technology for pixels of types: UINT8, UINT16 (for inDistanceMeasure = MeanError), INT16 (for inDistanceMeasure = MeanError), REAL.
This operation supports automatic parallelization for multicore and multiprocessor systems.
Errors
This filter can throw an exception to report error. Read how to deal with errors in Error Handling.
List of possible exceptions:
| Error type | Description |
|---|---|
| DomainError | Not supported distance measure in ImageDifferenceImage. |
Complexity Level
This filter is available on Advanced Complexity Level.
See Also
- ImageDifference – Measures dissimilarity between two images.
- LocateMultipleObjects_SAD – Finds multiple occurrences of a predefined template on an image by analysing the Square Average Difference between pixel values.