《学习OpenCV》练习题第三章第八题a

  1 #include <highgui.h>
  2 #include <cv.h>
  3 #include <stdio.h>
  4 
  5 #pragma comment (lib,"opencv_calib3d231d.lib")
  6 #pragma comment (lib,"opencv_contrib231d.lib")
  7 #pragma comment (lib,"opencv_core231d.lib")
  8 #pragma comment (lib,"opencv_features2d231d.lib")
  9 #pragma comment (lib,"opencv_flann231d.lib")
 10 #pragma comment (lib,"opencv_gpu231d.lib")
 11 #pragma comment (lib,"opencv_haartraining_engined.lib")
 12 #pragma comment (lib,"opencv_highgui231d.lib")
 13 #pragma comment (lib,"opencv_imgproc231d.lib")
 14 #pragma comment (lib,"opencv_legacy231d.lib")
 15 #pragma comment (lib,"opencv_ml231d.lib")
 16 #pragma comment (lib,"opencv_objdetect231d.lib")
 17 #pragma comment (lib,"opencv_ts231d.lib")
 18 #pragma comment (lib,"opencv_video231d.lib")
 19 
 20 /*
 21  *《学习OpenCV》第三章第八题a
 22  * 完成时间：19:12 4/4 星期四  2013
 23  */
 24 
 25 typedef struct my_struct
 26 {
 27     int i;
 28     CvPoint point;
 29     CvRect rect;
 30 } MyStruct;
 31 
 32 void write_my_struct(CvFileStorage * fs, const char* name, my_struct*  ms)
 33 {
 34     //开始写数据
 35     cvStartWriteStruct(fs, name, 6);
 36 
 37     //写入一个 整数
 38     cvStartWriteStruct(fs,"integer",CV_NODE_SEQ);
 39     cvWriteInt(fs,NULL,ms->i);
 40     cvEndWriteStruct(fs);
 41 
 42     //写入cvpoint结构
 43     cvStartWriteStruct(fs,"CvPoint",CV_NODE_SEQ);
 44     cvWriteInt(fs,NULL,ms->point.x);
 45     cvWriteInt(fs,NULL,ms->point.y);
 46     cvEndWriteStruct(fs);
 47     
 48     //写入rect结构体
 49     cvStartWriteStruct(fs,"CvRect",CV_NODE_SEQ);
 50     cvWriteInt(fs,NULL,ms->rect.x);
 51     cvWriteInt(fs,NULL,ms->rect.y);
 52     cvWriteInt(fs,NULL,ms->rect.height);
 53     cvWriteInt(fs,NULL,ms->rect.width);
 54     cvEndWriteStruct(fs);
 55      
 56     //结束写数据
 57     cvEndWriteStruct(fs);
 58 }
 59 
 60 void read_my_struct(CvFileStorage* fs, CvFileNode* ms_node, my_struct* ms)
 61 {
 62     // 读第一个整数
 63     // 注意：这里应使用node->data.i的value来读取Integer
 64     int i = cvGetFileNodeByName(fs, ms_node, "integer")->data.i;
 65     ms->i = i;
 66 
 67     // 读CvPoint结构
 68     CvSeq *s1 = cvGetFileNodeByName(fs, ms_node, "CvPoint")->data.seq;
 69     CvPoint point;
 70     point.x= cvReadInt((CvFileNode*)cvGetSeqElem(s1,0));
 71     point.y= cvReadInt((CvFileNode*)cvGetSeqElem(s1,1));
 72     ms->point = point;
 73 
 74     // 读取CvRect结构
 75     CvSeq *s2 = cvGetFileNodeByName(fs, ms_node, "CvRect")->data.seq;
 76     CvRect rect;
 77     rect.x=cvReadInt((CvFileNode*)cvGetSeqElem(s2, 0));
 78     rect.y=cvReadInt((CvFileNode*)cvGetSeqElem(s2, 1));
 79     rect.width=cvReadInt((CvFileNode*)cvGetSeqElem(s2, 3));
 80     rect.height=cvReadInt((CvFileNode*)cvGetSeqElem(s2, 2));
 81     ms->rect = rect;
 82 }
 83 
 84 // 将MyStruct的值显示出来
 85 void ShowStructValue(MyStruct* pvalue)
 86 {
 87     printf("integer:%d\n", pvalue->i);
 88     printf("CvPoint: (%d, %d)\n", pvalue->point.x, pvalue->point.y );
 89     printf("CvRect: h-->%d\tw-->%d\t(%d, %d)\n", pvalue->rect.height, 
 90         pvalue->rect.width, pvalue->rect.x, pvalue->rect.y);
 91 }
 92 
 93 
 94 int main()
 95 {
 96     /* 写数据部分 */
 97     MyStruct struct_1; 
 98     struct_1.i = 10;
 99     struct_1.point = cvPoint(50, 145);
100     struct_1.rect = cvRect(2, 2, 400, 400);
101 
102     CvFileStorage* fs = cvOpenFileStorage("My_struct.xml", 0, CV_STORAGE_WRITE);
103 
104     write_my_struct(fs, "my_struct", &struct_1);
105     cvReleaseFileStorage(&fs);
106 
107     /* 读数据部分 */
108     fs = cvOpenFileStorage("My_struct.xml", NULL, CV_STORAGE_READ );
109     MyStruct struct_2;
110      CvFileNode *pnode = cvGetFileNodeByName(fs, NULL, "my_struct");
111 
112     read_my_struct( fs, pnode, &struct_2 );
113 
114     // 显示
115     printf("---------------- Write -----------------\n");
116     ShowStructValue( & struct_1 );
117     printf("---------------- Read -------------------\n");
118     ShowStructValue( & struct_2);
119 
120     cvReleaseFileStorage(&fs);
121 
122     return 0;
123 }

相应的XML文件：

 

运行结果：