__abs |
private
int __abs( int value)
Computes the absolute value of the input.
- value
- Input value.
__alloc |
private
void __alloc( unsigned int width, unsigned int height)
Default image buffer allocator.
- width
- Default width of the source image buffer in pixels.
- height
- Default height of the source image buffer in pixels.
__alloc(image_struct *, unsigned int) |
private
void __alloc( image_struct *images, unsigned int index)
Initializes the image structure in our image buffer array at the location referenced by the specified
index value with a user specified image structure.
- images
- Array of user specified image structures to initialize our image buffer array with.
- index
- Location in array of image structures to copy image buffer (as well as any associated state) from.
__alloc(unsigned int) |
private
void __alloc( unsigned int index)
Allocates and initializes the image structure located at the specified index value.
- index
- Image structure location to allocate and initialize in image buffer array.
__cache |
private
void __cache( unsigned int index)
Saves the source image buffer (as well as any associated state) into the array of image structures
at the location referenced by the specified index value.
- index
- Location in array of image structures used to save source image buffer.
__clear |
private
void __clear( void)
Clears all pixels in the U, V (i.e. B, R luminance) channels of the source image buffer.
__hash |
private
void __hash( void)
Generates a hash value for the source image buffer.
__invert |
private
void __invert( void)
Inverts all pixels contained within the Y channel (i.e. luminance) of the source image buffer.
__sobel |
private
void __sobel( void)
Runs the Sobel convolution over all pixels contained within the Y channel (i.e. luminance) of
the source image buffer.
__sum |
private
void __sum( unsigned int index)
Calculates the sum of absolute differences between the Y channels (i.e. luminance) of the
source and selected image buffers.
- index
- Location in array of image buffers used for difference calculation.
CachePixels |
private
void CachePixels( void)
Saves the source image buffer (as well as any associated state) into the array of image structures.
ComparePixels |
private
unsigned char* ComparePixels( void)
Runs the implemented comparison operation (sum of absolute differences) against
all pixels in the Y channel (i.e. luminance) of the selected image buffers (from
the array of image structures) and the Y channel of the source image buffer.
FaceDetector |
public
~FaceDetector()
Destructor for the FaceDetector class.
FaceDetector(image_struct *, unsigned int, unsigned int, unsigned int) |
public
FaceDetector( image_struct *images, unsigned int count, unsigned int width, unsigned int height) : image_count( count)
Constructor for the FaceDetector class used to configure and initialize our image buffer array using
a user specified array of image structures.
- images
- Array of user specified image structures from which to initialize our image buffer array with.
- count
- Default number of image structures to allocate.
- width
- Default width of the source image buffer in pixels.
- height
- Default height of the source image buffer in pixels.
FaceDetector(unsigned int, unsigned int, unsigned int) |
public
FaceDetector( unsigned int count, unsigned int width, unsigned int height) : image_count( count)
Constructor for the FaceDetector class used to configure and initialize our image buffer array using the
default allocator.
- count
- Default number of image structures to allocate.
- width
- Default width of the source image buffer in pixels.
- height
- Default height of the source image buffer in pixels.
FilterPixels |
private
void FilterPixels( void)
Image post-processing stage used to filter (if necessary) the source image buffer before further processing.
HasFace |
public
unsigned char* HasFace( unsigned char *pixels, unsigned int range, unsigned int width, unsigned int height, flags_struct flags)
This routine acts as a simple wrapper around any underlying image processing (e.g. FilterPixels) and image comparison (e.g. ComparePixels) stages.
- pixels
- Pointer to the YUV 4:2:0 format source image buffer.
- range
- Differencing range used during image comparison.
- width
- Width of source image buffer in pixels.
- height
- Height of source image buffer in pixels.
- flags
- Configuration settings associated with the source image buffer.
~FaceDetector |
public
~FaceDetector()
Destructor for the FaceDetector class.
(Last Updated September 20, 2006)