Functions
cvbbool_t	PMAccTestBuildIndexMaps (TLEARNINGDATAACCESS acc)
	Update a learning data access index map. More...

cvbbool_t	PMAccTestFeatureWindow (TLEARNINGDATAACCESS acc, cvbdim_t &numImagePlanes, cvbdim_t &fwLeft, cvbdim_t &fwTop, cvbdim_t &fwRight, cvbdim_t &fwBottom)
	Retrieve geometry information from a generalized data access object. More...

cvbbool_t	PMAccTestGetExampleClassLabel (TLEARNINGDATAACCESS acc, cvbval_t imageIndex, cvbval_t exampleIndex, char *szLabel, size_t &len)
	Retrieve an example's class label. More...

cvbbool_t	PMAccTestGetExampleClassLabelW (TLEARNINGDATAACCESS acc, cvbval_t imageIndex, cvbval_t exampleIndex, wchar_t *szLabel, size_t &len)
	Retrieve an example's class label. More...

cvbbool_t	PMAccTestGetExampleGeometry (TLEARNINGDATAACCESS acc, cvbval_t imageIndex, cvbval_t exampleIndex, TGeometrySpec &specification)
	Retrieve information about an example's geometry. More...

cvbbool_t	PMAccTestGetExamplePosition (TLEARNINGDATAACCESS acc, cvbval_t imageIndex, cvbval_t exampleIndex, double &X, double &Y)
	Retrieve information about an example's geometry. More...

cvbbool_t	PMAccTestGetExampleVector (TLEARNINGDATAACCESS acc, cvbval_t imageIndex, cvbval_t exampleIndex, double *vector)
	Retrieve an example's regression value. More...

IMG	PMAccTestGetImage (TLEARNINGDATAACCESS acc, cvbval_t imageIndex)
	Retrieve a sample image. More...

cvbval_t	PMAccTestGetNumExamplesInImage (TLEARNINGDATAACCESS acc, cvbval_t imageIndex)
	Retrieve the number of samples inside an image. More...

cvbval_t	PMAccTestGetNumImages (TLEARNINGDATAACCESS acc)
	Retrieve the number of sample images. More...

cvbval_t	PMAccTestGetOutputDimension (TLEARNINGDATAACCESS acc)
	Retrieve the output dimension for regression training sets. More...

cvbbool_t	PMAccTestQueryUsage (TLEARNINGDATAACCESS acc, cvbbool_t &canDoClassification, cvbbool_t &canDoRegression, cvbbool_t &canDoSearch)
	Query the possible uses of a `TLEARNINGDATAACCESS` object. More...

Detailed Description

Function Documentation

◆ PMAccTestBuildIndexMaps()

cvbbool_t PMAccTestBuildIndexMaps ( TLEARNINGDATAACCESS acc )

Update a learning data access index map.

Each object created with PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch internally maintains a list of all available examples along with the image and sample indices required for accessing it. This list must be initialized after the TLEARNINGDATACCESS object has been created and before it is being in one of the access verification functions (the functions for classifier generation and leave out testing will initialize the index maps automatically). It must be re-initialized whenever the content of the training database changed.

Parameters

[in] acc Data access object as returned by PMCreateLearningDataAccess.

Returns: True if the operation succeeded, False otherwise.

◆ PMAccTestFeatureWindow()

cvbbool_t PMAccTestFeatureWindow	(	TLEARNINGDATAACCESS	acc,
		cvbdim_t &	numImagePlanes,
		cvbdim_t &	fwLeft,
		cvbdim_t &	fwTop,
		cvbdim_t &	fwRight,
		cvbdim_t &	fwBottom
	)

Retrieve geometry information from a generalized data access object.

Queries an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess for the feature window size and depth.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.
[out]	numImagePlanes	Number of images planes in the feature window.
[out]	fwLeft	Left edge of the feature window.
[out]	fwTop	Top edge of the feature window.
[out]	fwRight	Right edge of the feature window.
[out]	fwBottom	Bottom edge of the feature window.

Returns: True if the access succeeded, false otherwise.

◆ PMAccTestGetExampleClassLabel()

cvbbool_t PMAccTestGetExampleClassLabel	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex,
		cvbval_t	exampleIndex,
		char *	szLabel,
		size_t &	len
	)

Retrieve an example's class label.

Retrieves the class label of a given example from an object created with PMCreateLearningDataAccess. Note that class labels can only be retrieved from data access objects for which a class label callback has been specified. This can be queried with the function PMAccTestQueryUsage.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess.
[in]	imageIndex	Index of the image in which a sample is located.
[in]	exampleIndex	Index of the example inside the iamge referenced by the `imageIndex`.
[in]	szLabel	Pointer to a character buffer that receives the class label. `imageIndex` and the `exampleIndex`.
[in,out]	len	Length of the buffer pointed to by `szBuffer`. Upon return, this parameter will receive the number of characters that have been written to the buffer.

Returns: True if the referenced sample exists, False otherwise.

◆ PMAccTestGetExampleClassLabelW()

cvbbool_t PMAccTestGetExampleClassLabelW	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex,
		cvbval_t	exampleIndex,
		wchar_t *	szLabel,
		size_t &	len
	)

Retrieve an example's class label.

Retrieves the class label of a given example from an object created with PMCreateLearningDataAccess. Note that class labels can only be retrieved from data access objects for which a class label callback has been specified. This can be queried with the function PMAccTestQueryUsage.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess.
[in]	imageIndex	Index of the image in which a sample is located.
[in]	exampleIndex	Index of the example inside the iamge referenced by the `imageIndex`.
[in]	szLabel	Pointer to a character buffer that receives the class label. `imageIndex` and the `exampleIndex`.
[in,out]	len	Length of the buffer pointed to by `szBuffer`. Upon return, this parameter will receive the number of characters that have been written to the buffer.

Returns: True if the referenced sample exists, False otherwise.

◆ PMAccTestGetExampleGeometry()

cvbbool_t PMAccTestGetExampleGeometry	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex,
		cvbval_t	exampleIndex,
		TGeometrySpec &	specification
	)

Retrieve information about an example's geometry.

Retrieves information about the geometry (transformation state) of a given example from an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.
[in]	imageIndex	Index of the image in which a sample is located.
[in]	exampleIndex	Index of the example inside the iamge referenced by the `imageIndex`.
[out]	specification	Geometry/Transformation specification for the example references the `imageIndex` and `exampleIndex`.

Returns: True if the referenced sample exists, False otherwise.

◆ PMAccTestGetExamplePosition()

cvbbool_t PMAccTestGetExamplePosition	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex,
		cvbval_t	exampleIndex,
		double &	X,
		double &	Y
	)

Retrieve information about an example's geometry.

Retrieves the position of a given example from an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.
[in]	imageIndex	Index of the image in which a sample is located.
[in]	exampleIndex	Index of the example inside the iamge referenced by the `imageIndex`.
[out]	X	Horizontal position of the sample referenced by the `imageIndex` and the `exampleIndex`.
[out]	Y	Vertical position of the sample referenced by the `imageIndex` and the `exampleIndex`.

Returns: True if the referenced sample exists, False otherwise.

◆ PMAccTestGetExampleVector()

cvbbool_t PMAccTestGetExampleVector	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex,
		cvbval_t	exampleIndex,
		double *	vector
	)

Retrieve an example's regression value.

Retrieves the regression value for given example from an object created with PMCreateLearningDataAccess. Note that regression values can only be retrieved from data access objects for which a regression value callback has been specified. This can be queried with the function PMAccTestQueryUsage.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess.
[in]	imageIndex	Index of the image in which a sample is located.
[in]	exampleIndex	Index of the example inside the iamge referenced by the `imageIndex`.
[in]	vector	Pointer to a buffer that will receive the regression value. The buffer's size must be the return value of the function PMAccTestGetOutputDimension times `sizeof(double)`. `imageIndex` and the `exampleIndex`.

Returns: True if the referenced sample exists, False otherwise.

◆ PMAccTestGetImage()

IMG PMAccTestGetImage	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex
	)

Retrieve a sample image.

Retrieves a sample image from an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.
[in]	imageIndex	Index of the image to be retrieved.

Returns: Image handle or NULL.

◆ PMAccTestGetNumExamplesInImage()

cvbval_t PMAccTestGetNumExamplesInImage	(	TLEARNINGDATAACCESS	acc,
		cvbval_t	imageIndex
	)

Retrieve the number of samples inside an image.

Retrieves the number of samples for a given image from an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess.

Attention: Make sure that the function PMAccTestBuildIndexMaps has been called before this function is invoked.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.
[in]	imageIndex	Index of the image for which to query the number of samples.

Returns: Number of samples inside the selected image.

◆ PMAccTestGetNumImages()

cvbval_t PMAccTestGetNumImages ( TLEARNINGDATAACCESS acc )

Retrieve the number of sample images.

Retrieves the sample image count from an object created with PMCreateLearningDataAccessSearch or PMCreateLearningDataAccess.

Parameters

[in] acc Data access object as returned by PMCreateLearningDataAccess or PMCreateLearningDataAccessSearch.

Returns: Number of available sample images.

◆ PMAccTestGetOutputDimension()

cvbval_t PMAccTestGetOutputDimension ( TLEARNINGDATAACCESS acc )

Retrieve the output dimension for regression training sets.

Retrieves the regression output dimension from an object created with PMCreateLearningDataAccess. Note that the output dimension can only be retrieved from data access objects for which an output dimension callback has been specified. This can be queried with the function PMAccTestQueryUsage.

Parameters

[in] acc Data access object as returned by PMCreateLearningDataAccess.

Returns: Output dimension or zero.

◆ PMAccTestQueryUsage()

cvbbool_t PMAccTestQueryUsage	(	TLEARNINGDATAACCESS	acc,
		cvbbool_t &	canDoClassification,
		cvbbool_t &	canDoRegression,
		cvbbool_t &	canDoSearch
	)

Query the possible uses of a TLEARNINGDATAACCESS object.

When creating a learning data access object with PMCreateLearningDataAccess different sets of callbacks may be specified that make the access object suitable for either classification training or regression training or both. Classifiers created with PMCreateLearningDataAccessSearch are suitable for neither.

Parameters

[in]	acc	Data access object as returned by PMCreateLearningDataAccess.
[out]	canDoClassification	`True` if the callback for classification labels is available, `False` otherwise.
[out]	canDoSearch	`True` if the `acc` parameter is usable for search classifier training, `False` otherwise.
[out]	canDoRegression	`True` if the callback for regression training has been specified. `False` otherwise.

Returns: True if the operation succeeded, False otherwise.


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Functions

Detailed Description

Function Documentation

◆ PMAccTestBuildIndexMaps()

◆ PMAccTestFeatureWindow()

◆ PMAccTestGetExampleClassLabel()

◆ PMAccTestGetExampleClassLabelW()

◆ PMAccTestGetExampleGeometry()

◆ PMAccTestGetExamplePosition()

◆ PMAccTestGetExampleVector()

◆ PMAccTestGetImage()

◆ PMAccTestGetNumExamplesInImage()

◆ PMAccTestGetNumImages()

◆ PMAccTestGetOutputDimension()

◆ PMAccTestQueryUsage()