autoDoc/HTML/---libInvertedFile-include-gift_features-h

    #ifndef _GIFT_FEATURES
    #define _GIFT_FEATURES
    /* feature classes */

    #define COL_POS		0	/* a colour in a specific position (and at a
    						specific scale) */
    #define COL_HST		1	/* the proportion of a given colour */
    #define GABOR_POS	2	/* the value of a Gabor filter in a particular
    						position */
    #define GABOR_HST	3	/* the proportion of a particular value of a Gabor
    						filter in the image */

    #define FREQ_MAX 0x7fffffff     /* since we will use FLOATS to store frequencies we want high resolution (WM) */

    typedef unsigned int freq_type;

    typedef struct _FEATURE_DATA {
    	int id;
    	freq_type frequency; /* i.e. f = frequency/FREQ_MAX */
    } FEATURE_DATA;

    /* use primitive hacks by Wolfgang for
       adapting to Wolfgang's code */
    #define WOLFGANG_HACK

    #endif