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LocateMultipleObjects_NCC_Deprecated
Header: | AVL.h |
---|---|
Namespace: | avl |
Module: | MatchingBasic |
Finds all occurrences of a predefined template on an image by analysing the normalized correlation between pixel values.
Applications: Detection of objects with blurred or unclear edges. Often one of the first filters in a program.
Syntax
void avl::LocateMultipleObjects_NCC_Deprecated ( const avl::Image& inImage, atl::Optional<const avl::Region&> inSearchRegion, const avl::GrayModel& inGrayModel, int inMinPyramidLevel, atl::Optional<int> inMaxPyramidLevel, bool inIgnoreBoundaryObjects, float inMinScore, float inMinDistance, atl::Optional<float> inMaxBrightnessRatio, atl::Optional<float> inMaxContrastRatio, atl::Array<avl::Object2D>& outObjects, atl::Optional<int&> outPyramidHeight = atl::NIL, atl::Array<avl::Image>& diagImagePyramid = atl::Dummy<atl::Array<avl::Image>>(), atl::Array<avl::Image>& diagMatchPyramid = atl::Dummy<atl::Array<avl::Image>>(), atl::Array<atl::Array<float>>& diagScores = atl::Dummy<atl::Array<atl::Array<float>>>() )
Parameters
Name | Type | Range | Default | Description | |
---|---|---|---|---|---|
inImage | const Image& | Image on which model occurrences will be searched | |||
inSearchRegion | Optional<const Region&> | NIL | Range of possible object centers | ||
inGrayModel | const GrayModel& | Model of objects to be searched | |||
inMinPyramidLevel | int | 0 - 12 | 0 | Defines the lowest pyramid level at which object position is still refined | |
inMaxPyramidLevel | Optional<int> | 0 - 12 | 3 | Defines the total number of reduced resolution levels that can be used to speed up computations | |
inIgnoreBoundaryObjects | bool | False | Flag indicating whether objects crossing image boundary should be ignored or not | ||
inMinScore | float | -1.0 - 1.0 | 0.7f | Minimum score of object candidates accepted at each pyramid level | |
inMinDistance | float | 0.0 - | 10.0f | Minimum distance between two found objects | |
inMaxBrightnessRatio | Optional<float> | 1.0 - | NIL | Defines the maximal deviation of the mean brightness of the model object and the object present in the image | |
inMaxContrastRatio | Optional<float> | 1.0 - | NIL | Defines the maximal deviation of the brightness standard deviation of the model object and the object present in the image | |
outObjects | Array<Object2D>& | Found objects | |||
outPyramidHeight | Optional<int&> | NIL | Highest pyramid level used to speed up computations | ||
diagImagePyramid | Array<Image>& | Pyramid of iteratively downsampled input image | |||
diagMatchPyramid | Array<Image>& | Candidate object locations found at each pyramid level | |||
diagScores | Array<Array<float>>& | Scores of the found objects at each pyramid level |
Optional Outputs
The computation of following outputs can be switched off by passing value atl::NIL
to these parameters: outPyramidHeight.
Read more about Optional Outputs.
Hardware Acceleration
This operation is optimized for SSE2 technology for pixels of type: UINT8.
This operation is optimized for AVX2 technology for pixels of type: UINT8.
This operation supports automatic parallelization for multicore and multiprocessor systems.