?? readseq.cpp
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#include <stdio.h>#include "cxcore.h"
#include "cv.h"
#include "highgui.h"
#include "cxcore.h"
#include "ml.h"
#include "cvaux.h"
#include "cvcam.h"int main( int argc, char** argv ){ CvFileStorage* fs = cvOpenFileStorage( "points.yml", 0, CV_STORAGE_READ ); CvStringHashNode* x_key = cvGetHashedNode( fs, "x", -1, 1 ); CvStringHashNode* y_key = cvGetHashedNode( fs, "y", -1, 1 ); CvFileNode* points = cvGetFileNodeByName( fs, 0, "points" ); if( CV_NODE_IS_SEQ(points->tag) ) { CvSeq* seq = points->data.seq; int i, total = seq->total; CvSeqReader reader; cvStartReadSeq( seq, &reader, 0 ); for( i = 0; i < total; i++ ) { CvFileNode* pt = (CvFileNode*)reader.ptr;#if 1 /* 快變量 */ CvFileNode* xnode = cvGetFileNode( fs, pt, x_key, 0 ); CvFileNode* ynode = cvGetFileNode( fs, pt, y_key, 0 ); assert( xnode && CV_NODE_IS_INT(xnode->tag) && ynode && CV_NODE_IS_INT(ynode->tag)); int x = xnode->data.i; // or x = cvReadInt( xnode, 0 ); int y = ynode->data.i; // or y = cvReadInt( ynode, 0 );#elif 1 /* 慢變量：不使用x值與y值 */ CvFileNode* xnode = cvGetFileNodeByName( fs, pt, "x" ); CvFileNode* ynode = cvGetFileNodeByName( fs, pt, "y" ); assert( xnode && CV_NODE_IS_INT(xnode->tag) && ynode && CV_NODE_IS_INT(ynode->tag)); int x = xnode->data.i; // or x = cvReadInt( xnode, 0 ); int y = ynode->data.i; // or y = cvReadInt( ynode, 0 );#else /* 最慢的可以輕松使用的變量 */ int x = cvReadIntByName( fs, pt, "x", 0 /* default value */ ); int y = cvReadIntByName( fs, pt, "y", 0 /* default value */ );#endif CV_NEXT_SEQ_ELEM( seq->elem_size, reader ); printf("%d: (%d, %d)\n", i, x, y ); } } cvReleaseFileStorage( &fs ); return 0;}?? 快捷鍵說明
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