public static uint NumSeparableFilters <T, U>(ObjectDetector <ScanFHogPyramid <T, U> > detector, uint weightIndex = 0)
where T : class
where U : class
{
if (detector == null)
{
throw new ArgumentNullException(nameof(detector));
}
detector.ThrowIfDisposed();
var param = detector.GetFHogPyramidParameter();
var ret = NativeMethods.scan_fhog_pyramid_num_separable_filters(param.PyramidType,
param.PyramidRate,
param.FeatureExtractorType,
detector.NativePtr,
weightIndex,
out var num);
switch (ret)
{
case NativeMethods.ErrorType.FHogNotSupportExtractor:
case NativeMethods.ErrorType.PyramidNotSupportRate:
case NativeMethods.ErrorType.PyramidNotSupportType:
throw new NotSupportedException();
}
return(num);
}
public static Matrix <byte> DrawFHog <T>(ObjectDetector <T> hogImage, uint weightIndex = 0, int cellDrawSize = 15)
where T : ImageScanner
{
if (hogImage == null)
{
throw new ArgumentNullException(nameof(hogImage));
}
//// make sure requires clause is not broken
//DLIB_ASSERT(weight_index < detector.num_detectors(),
// "\t matrix draw_fhog()"
// << "\n\t Invalid arguments were given to this function. "
// << "\n\t weight_index: " << weight_index
// << "\n\t detector.num_detectors(): " << detector.num_detectors()
//);
//DLIB_ASSERT(cell_draw_size > 0 && detector.get_w(weight_index).size() >= detector.get_scanner().get_num_dimensions(),
// "\t matrix draw_fhog()"
// << "\n\t Invalid arguments were given to this function. "
// << "\n\t cell_draw_size: " << cell_draw_size
// << "\n\t weight_index: " << weight_index
// << "\n\t detector.get_w(weight_index).size(): " << detector.get_w(weight_index).size()
// << "\n\t detector.get_scanner().get_num_dimensions(): " << detector.get_scanner().get_num_dimensions()
//);
hogImage.ThrowIfDisposed();
return(hogImage.DrawFHog(weightIndex, cellDrawSize));
}
public static Matrix <double> TestObjectDetectionFunction <T, U>(ObjectDetector <T> detector,
IEnumerable <Matrix <U> > images,
IEnumerable <IEnumerable <Rectangle> > objects)
where T : ImageScanner
where U : struct
{
if (detector == null)
{
throw new ArgumentNullException(nameof(detector));
}
if (images == null)
{
throw new ArgumentNullException(nameof(images));
}
if (objects == null)
{
throw new ArgumentNullException(nameof(objects));
}
detector.ThrowIfDisposed();
images.ThrowIfDisposed();
return(detector.TestObjectDetectionFunction(images, objects));
}
public static ObjectDetector <ScanFHogPyramid <T, U> > ThresholdFilterSingularValues <T, U>(ObjectDetector <ScanFHogPyramid <T, U> > detector,
double threshold,
uint weightIndex = 0)
where T : class
where U : class
{
if (detector == null)
{
throw new ArgumentNullException(nameof(detector));
}
if (threshold < 0)
{
throw new ArgumentOutOfRangeException();
}
detector.ThrowIfDisposed();
var param = detector.GetFHogPyramidParameter();
var ret = NativeMethods.scan_fhog_pyramid_threshold_filter_singular_values(param.PyramidType,
param.PyramidRate,
param.FeatureExtractorType,
detector.NativePtr,
threshold,
weightIndex,
out var newDetector);
switch (ret)
{
case NativeMethods.ErrorType.FHogNotSupportExtractor:
case NativeMethods.ErrorType.PyramidNotSupportRate:
case NativeMethods.ErrorType.PyramidNotSupportType:
throw new NotSupportedException();
}
return(new ObjectDetector <ScanFHogPyramid <T, U> >(newDetector, param));
}
