Digikam::Haar Namespace Reference

Classes
class	Calculator
class	ImageData
class	SignatureData
class	SignatureMap
	This class provides very fast lookup if a certain pixel is set (positive or negative) in the loaded coefficient set. More...
class	WeightBin
class	Weights
Typedefs
typedef qint32	Idx
typedef double	Unit
typedef std::priority_queue < valStruct >	valqueue
Enumerations
enum	{ NumberOfPixels = 128 }
enum	{ NumberOfPixelsSquared = NumberOfPixels * NumberOfPixels }
enum	{ NumberOfCoefficients = 40 }
Variables
static const float	s_haar_weights [2][6][3]

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Typedef Documentation

typedef qint32 Digikam::Haar::Idx

Definition at line 92 of file haar.h.

typedef double Digikam::Haar::Unit

Definition at line 89 of file haar.h.

typedef std::priority_queue<valStruct> Digikam::Haar::valqueue

Definition at line 71 of file haar.cpp.

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Enumeration Type Documentation

anonymous enum

Number of pixels on one side of image; required to be a power of 2.

Enumerator:

NumberOfPixels

Definition at line 79 of file haar.h.

anonymous enum

Total pixels in a square image.

Enumerator:

NumberOfPixelsSquared

Definition at line 83 of file haar.h.

anonymous enum

Number of Haar coefficients we retain as signature for an image.

Enumerator:

NumberOfCoefficients

Definition at line 87 of file haar.h.

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Variable Documentation

const float Digikam::Haar::s_haar_weights[2][6][3] [static]

Initial value:

{
    
    
    {{ 5.00F, 19.21F, 34.37F },   
     { 0.83F,  1.26F,  0.36F },   
     { 1.01F,  0.44F,  0.45F },   
     { 0.52F,  0.53F,  0.14F },   
     { 0.47F,  0.28F,  0.18F },   
     { 0.30F,  0.14F,  0.27F }},  

    
    
    {{ 4.04F, 15.14F, 22.62F },
     { 0.78F,  0.92F,  0.40F },
     { 0.46F,  0.53F,  0.63F },
     { 0.42F,  0.26F,  0.25F },
     { 0.41F,  0.14F,  0.15F },
     { 0.32F,  0.07F,  0.38F }}
}

Weights for the Haar coefficients.

Straight from the referenced paper "Fast Multiresolution Image Querying" by Charles E. Jacobs, Adam Finkelstein and David H. Salesin. http://www.cs.washington.edu/homes/salesin/abstracts.html

Definition at line 56 of file haar.h.