cva-match.c

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/*
 * =====================================================================================
 *
 *       Filename:  cva-match.c
 *
 *    Description:  Match an image to its parent image, and return the coordinates
 *
 *        Version:  0.1
 *        Created:  06/20/2012
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Bradlee Speice, bspeice@uncc.edu
 *   Organization:  MOSAIC at University of North Carolina at Charlotte
 *
 * =====================================================================================
 */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <limits.h>

#include <libcvautomation/libcvautomation.h>

void usage ();

struct list {
    char *fileName;
    struct list *next;
};

typedef struct list basic_list; 

int main( int argc, char** argv )
{
    CvPoint result_point;
    result_point.x = result_point.y = 0;

    /* Set up everything for getopt */
    char *separator = ",";
    char *root_location = "root.png";
    char *sub_location = "sub.png";
    int tolerance = INT_MAX;
    int search_method = CV_TM_SQDIFF;
    int useX = 0; /* bool useX = false; */
    int useCenter = 0;
    char *xDisplayLocation;
    Display *display;
    /* This line to suppress a compiler warning */
    display = NULL;

    /* Set the default display */
    xDisplayLocation = "";

    /* Set up the linked list for slave images */
    basic_list *list_head = NULL, *list_curr = NULL, *list_prev = NULL;

    /* Start getopt */
    while (1)
    {
        static struct option long_options[] =
        {
                {"help",        no_argument,        0,  'h'},
                {"usage",       no_argument,        0,  'u'},
                {"version",     no_argument,        0,  'v'},
                {"root-image",  required_argument,  0,  'r'},
                {"sub-image",   required_argument,  0,  's'},
                {"separator",   required_argument,  0,  'p'},
                {"search-method",required_argument, 0,  'm'},
                {"tolerance",   required_argument,  0,  't'},
                {"x-root",      optional_argument,  0,  'x'},
                {"center",      no_argument,        0,  'c'},
                {"sane-tolerance", required_argument, 0, 'o'},
                {0, 0, 0, 0}
        };

        int option_index = 0;
        opterr = 0;

        int c = getopt_long (argc, argv, "hur:s:p:m:t:x::c",
                            long_options, &option_index);

        /* We're done with parsing options */
        if (c == -1)
            break;

        switch (c)
        {
            case 0:
                break;

            case 'h':
                usage();
                break;

            case 'u':
                usage();
                break;

            case 'v':
                usage();
                break;

            case 'r':
                root_location = optarg;
                break;

            case 's':
                if ( list_head == NULL )
                {
                    list_head = (basic_list *) malloc (sizeof(basic_list));
                    list_curr = list_head;
                }
                list_curr->fileName = optarg;
                list_curr->next = (basic_list *) malloc (sizeof(basic_list));
                list_curr = list_curr->next;
                break;

            case 'p':
                separator = optarg;
                break;

            case 'm':
                search_method = atoi(optarg);
                break;

            case 't':
                tolerance = atoi(optarg);
                break;

            case 'x':
                if ( optarg != NULL ) {
                    useX = 1;
                    xDisplayLocation = optarg;
                    display = XOpenDisplay(xDisplayLocation);
                } else {
                    useX = 1;
                    xDisplayLocation = "";
                    display = XOpenDisplay(xDisplayLocation);
                }
                break;

            case 'c':
                useCenter = 1;

            case 'o':
                tolerance = atoi(optarg);
                /* Provide a more sane way to configure tolerance:
                 * --sane-tolerance=100 ~= INT_MAX */
                tolerance = pow(1.2397076, tolerance);
                break;

            case '?':
                /* Error routine */
                break;

            default:
                fprintf( stderr, "Unknown option..." );
                exit(0);
        };
    }

    /* Make sure we have a linked list, 
     * and reset the linked list to go back through from the top */
    if ( list_head == NULL )
        return 1;
    else
        list_curr = list_head;

    do
    {
        sub_location = list_curr->fileName;

        if (useX && useCenter)
            result_point = matchSubImage_X11_location_center( display, sub_location, search_method, tolerance );
        else if (useX && !useCenter)
            result_point = matchSubImage_X11_location( display, sub_location, search_method, tolerance );
        else if (!useX && useCenter)
            result_point = matchSubImage_location_center( root_location, sub_location, search_method, tolerance );
        else /* if (!useX && !useCenter) */
            result_point = matchSubImage_location( root_location, sub_location, search_method, tolerance );

        if ( result_point.x != -1 && result_point.y != -1 )
            /* Output the match location */
            printf ("%s%s%i%s%i\n", list_curr->fileName, separator,
                    result_point.x, separator, result_point.y );

        /* With the way we allocate the list, we ensure that we always
         * have at least one element past the end of the list.
         * Also, deconstruct the list as we go. */
        list_prev = list_curr;
        list_curr = list_curr->next;
        free(list_prev);

    } while ( list_curr->fileName != NULL );

    /* And free the final element */
    free(list_curr);

    /* Clean up X */
    if (useX)
        XCloseDisplay(display);

    return 0;
}

/* 
 * ===  FUNCTION  ======================================================================
 *         Name:  usage
 *  Description:  I really shouldn't need to write this
 * =====================================================================================
 */
void usage ( )
{
    fprintf( stderr, "\
Libcvautomation version: %s\n\
cva-match -r <root_image> -s <sub_image> \n\
cva-match -s <sub_image> -x \n\
\n\
This program uses OpenCV in order to recognize an image within an image.\n\
The return code is how many matches were found - return 0 for no matches,\n\
1 for one match, etc.\n\
\n\
Usage: \n\
\n\
\t-h, --help:\t\tDisplay this usage message.\n\
\t-u, --usage:\t\tDisplay this usage message.\n\
\t-r, --root-image:\tLocation of the root image to compare against.\n\
\t-s, --sub-image:\tLocation of the sub-image to find in root.\n\
\t-p, --separator:\tSeparator of the X and Y coordinates.\n\
\t-t, --tolerance:\tSet how strict the match is - 100 is recommended lowest value.\n\
\t\t\t\tNote: When using CCORR or CCOEFF tolerance works in opposite direction,\n\
\t\t\t\tso -50 is recommended highest value.\n\
\t-m, --search-method:\tSet which method is used to search for sub-images.\n\
\t\t\t\tMethods:\n\
\t\t\t\t\tCV_TM_SQDIFF = 0\n\
\t\t\t\t\tCV_TM_SQDIFF_NORMED = 1\n\
\t\t\t\t\tCV_TM_CCORR = 2\n\
\t\t\t\t\tCV_TM_CCORR_NORMED = 3\n\
\t\t\t\t\tCV_TM_CCOEFF = 4\n\
\t\t\t\t\tCV_TM_COEFF_NORMED = 5\n\
\t-x, --x-root[=DISPLAY]:\tSet the root image to come from X11\n\
\t\t\t\tThe DISPLAY variable is optional, not specifying it will cause X\n\
\t\t\t\tto use the default display (not specifically :0.0)\n\
\t\t\t\tPlease note also that the '-x' must come at the end\n\
\t\t\t\tsince it is an optional argument.\n\
\t-c, --center:\t\tThe output points should be centered on the sub-image, rather\n\
\t\t\t\tthan the top-left corner.\n\
\t-o, --sane-tolerance:\tSet the tolerance using a scale of 1-100,\n\
\t\t\t\trather than INT_MIN to INT_MAX (100 ~= INT_MAX)\n\
\n\
If you have any questions, comments, concerns, email <%s>\n", LIBCVAUTOMATION_VERSION, LIBCVAUTOMATION_BUGREPORT );

    exit (0);

}       /* -----  end of function usage  ----- */

/* Doxygen Information */
/* The biggest purpose of documenting this code is to trick doxygen into making a man page for it. */

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