FileStorage如何追加？

Question

本帖最后由 mayingjie116 于 2013-05-15 11:48:07 编辑

Answer 1

哥哥我知道了教给你CvMat* mat = cvCreateMat( 3, 3, CV_32F );
CvMat *mat1=cvCreateMat(3,3,CV_64FC3);
cvSetIdentity(mat1);
CvFileStorage* fs = cvOpenFileStorage( "c:\\example.xml", 0, CV_STORAGE_WRITE );
    cvSetIdentity( mat );
     cvWrite( fs, "A", mat, cvAttrList(0,0) );
// cvWrite(fs,"B",mat1,cvAttrList(0,0));
    cvReleaseFileStorage( &fs );
CvFileStorage* fs1 = cvOpenFileStorage( "c:\\example.xml", 0, CV_STORAGE_APPEND );//这么简单就是这里CV_STORAGE_APPEND     //cvSetIdentity( mat );
    // cvWrite( fs1, "A", mat, cvAttrList(0,0) );
 cvWrite(fs1,"B",mat1,cvAttrList(0,0));
 
    cvReleaseFileStorage( &fs1 );
 
    cvReleaseMat( &mat );
cvReleaseMat(&mat1);
//读取 
CvMat *mata=cvCreateMat(3,3,CV_32F);
CvMat *matb=cvCreateMat(3,3,CV_64FC3); CvFileStorage *fs_read;
fs_read=cvOpenFileStorage("c:\\example.xml",0,CV_STORAGE_READ);
//mata=(CvMat*)cvReadByName(fs_read,NULL,"A",NULL);
matb=(CvMat*)cvReadByName(fs_read,NULL,"B",NULL);
int a=12;
for(int row=0;row<matb->rows;row++){
double *pd_row_start=(double *)(matb->data.ptr+row*(matb->step));
for(int col=0;col<matb->cols;col++){
double *pd_data=pd_row_start+col*3;
printf("%3.2f   ",*pd_data);
printf("%3.2f   ",*(pd_data+1));
printf("%3.2f   ",*(pd_data+2));
}

printf("\n %d\n",row);
} cvReleaseFileStorage(&fs_read);
cvReleaseMat(&mata);
cvReleaseMat(&matb);
     return 0;