cuSIFT_D.h

//********************************************************//
// CUDA SIFT extractor by Marten Bjorkman aka Celebrandil //
//********************************************************//  

#ifndef CUSIFTD_H
#define CUSIFTD_H

#define NUM_SCALES      5

// Scale down thread block width
#define SCALEDOWN_W   160 

// Scale down thread block height
#define SCALEDOWN_H    16

// Find point thread block width
#define MINMAX_W      126 

// Find point thread block height
#define MINMAX_H        4
 
// Laplace thread block width
#define LAPLACE_W      56 

// Number of laplace scales
#define LAPLACE_S   (NUM_SCALES+3)

// Laplace filter kernel radius
#define LAPLACE_R       4 

//====================== Number of threads ====================//
// ScaleDown:               SCALEDOWN_W + 4
// LaplaceMulti:            (LAPLACE_W+2*LAPLACE_R)*LAPLACE_S
// FindPointsMulti:         MINMAX_W + 2
// ComputeOrientations:     128
// ExtractSiftDescriptors:  256

//====================== Number of blocks ====================//
// ScaleDown:               (width/SCALEDOWN_W) * (height/SCALEDOWN_H)
// LaplceMulti:             (width+2*LAPLACE_R)/LAPLACE_W * height
// FindPointsMulti:         (width/MINMAX_W)*NUM_SCALES * (height/MINMAX_H)
// ComputeOrientations:     numpts
// ExtractSiftDescriptors:  numpts

#endif