/*############################################################################# * 文件名：fvs_mask.c * 功能：  指紋圖像有效區(qū)域 * modified by  PRTsinghua@hotmail.com#############################################################################*/#include "fvs.h"int main(int argc, char *argv[]){    FvsImage_t image;    FvsImage_t mask;    FvsFloatField_t direction;    FvsFloatField_t frequency;    if (argc!=3)    {        printf("Usage: fvs input.bmp output.bmp\n");        return -1;    }    mask      = ImageCreate();    image     = ImageCreate();    direction = FloatFieldCreate();    frequency = FloatFieldCreate();    if (mask!=NULL && image!=NULL && direction!=NULL && frequency!=NULL)    {        (void)FvsImageImport(image, argv[1]);	(void)ImageSoftenMean(image, 3);        fprintf(stdout, "1/3 Determining the ridge direction\n");        (void)FingerprintGetDirection(image, direction, 7, 8);        fprintf(stdout, "2/3 Determining the ridge frequency\n");        (void)FingerprintGetFrequency(image, direction, frequency);        fprintf(stdout, "3/3 Creating the mask\n");        (void)FingerprintGetMask(image, direction, frequency, mask);        (void)FvsImageExport(mask, argv[2]);    }    fprintf(stdout, "Cleaning up and exiting...\n");    FloatFieldDestroy(frequency);    FloatFieldDestroy(direction);    ImageDestroy(image);    ImageDestroy(mask);    return 0;}