gestures.h

基于Hu矩和支持向量机手完整性检测算法及应用.手势识别

/*
 *  -----------------------------------------------------------------------------
 *   Visual extraction of posture and motion features for gesture recognition
 *   Copyright (C) <2004,2008>  
 *                       Hector Hugo Aviles-Arriaga
 *    
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *  ----------------------------------------------------------------------------
 */

/**
 *  ----------------------------------------------------------------------------
 *
 *  gestures.h. Headers and variable declaration   
 *   
 *  ----------------------------------------------------------------------------
 */

// constants
#define NUM_BINS 32 // Number of histogram bins for each color channel 
#define SKIN     1
#define NON_SKIN 0

// fuction headers
CvHistogram* alloc_histogram_mem(void);
void load_color_model(char file[256], long int *frequency, int type);
void face_detection( CvHaarClassifierCascade* face_classifier);
void get_face_skin_color(void);
void fit(void);
void get_torso_color(void);
void hand_detection(void);
void body_dimensions(void);
void hand_tracking(void);
void queue_observations(void);
void get_pixel_color(int x, int y, unsigned char *color);
void back_projection (void);
int is_at_init_pos (void);
void update_roi_position(void);
void draw(void);
void record_hand_position(void);
// Usage
void get_options ( int argc, char** argv, char* cascade_name);
void usage(char * prog);

// variables
// OpenCV images
IplImage *frame;       // the current image
IplImage *backproject; // required by Camshift algorithm 

// color histograms
// 32 bins for each RGB color channel
CvHistogram *skin_hist = NULL,          // general skin color model
            *non_skin_hist = NULL,      // general non-skin color model 
            *torso_hist = NULL,         // user's torso color model (personal non-skin color model)
            *face_hist = NULL,          // face color model (personal skin color model)
            *combined_skin_hist = NULL; // hand color model 

// rectangular boundaries for the user's body parts  
// note: face and hand are used as flags in the main loop
CvRect  *face = NULL,
        *hand = NULL,
         torso,
         expected_hand_pos, // defines where to search the hand for the first time
         initial_hand_pos,     // initial region where the right-hand has been detected the first time 
         roi;               // attention window for hand tracking  

long int num_skin_pixels;     // Number of skin pixels sampled off-line
long int num_non_skin_pixels; // Number of non-skin pixels sampled off-line 
//static double skin_prob;      // skin prior probability
//static double nskin_prob;     // non-skin prior probability 
char face_classifier_filename[256];
char observations_filename[256];

/* Variables usadas para observaciones en PLs */

// Observation variables
// struct to record a single observation
typedef struct observation {
// (x,y) coordinate of the center of the face 
int x_fc; 
int y_fc;
// (x,y) coordinates of the torso rectangle
// upper-corner coordinate
int x_tu;
int y_tu; 
// lower-corner coordinate
int x_tl; 
int y_tl; 
// (x,y) coordinates of the segmented hand (rectangle)
// upper-corner coordinate
int x_hu; 
int y_hu; 
// lower-corner coordinate
int x_hl; 
int y_hl; 

} observation; 

observation O[1500]; // gesture samples

int T = 0; // number of observations for the current gesture

static CvMemStorage* face_storage = cvCreateMemStorage(0);