Opencv笔记(1) 命名规则数据结构(CvMat,...)

网上搜索了很多,检查中发现的信息劣势,检查源代码

同Cv为类的开始。包含详细的数据不(仅存储指针)

CvMat

typedef struct CvMat
{
int type;
int step; /* for internal use only */
int* refcount;
int hdr_refcount; union
{
uchar* ptr;
short* s;
int* i;
float* fl;
double* db;
} data;
<pre name="code" class="cpp">

#ifdef __cplusplus union { int rows; int height; }; union { int cols; int width; };#else int rows; int cols;#endif}CvMat;



<pre name="code" class="cpp">CV_INLINE CvMat cvMat( int rows, int cols, int type, void* data CV_DEFAULT(NULL))
{
CvMat m; assert( (unsigned)CV_MAT_DEPTH(type) <= CV_64F );
type = CV_MAT_TYPE(type);
m.type = CV_MAT_MAGIC_VAL | CV_MAT_CONT_FLAG | type;
m.cols = cols;
m.rows = rows;
m.step = m.cols*CV_ELEM_SIZE(type);
m.data.ptr = (uchar*)data;
m.refcount = NULL;
m.hdr_refcount = 0; return m;
}


CV_INLINE  double  cvmGet( const CvMat* mat, int row, int col )
{//低效率訪问!
    int type;     type = CV_MAT_TYPE(mat->type);
    assert( (unsigned)row < (unsigned)mat->rows &&
            (unsigned)col < (unsigned)mat->cols );     if( type == CV_32FC1 )
        return ((float*)(void*)(mat->data.ptr + (size_t)mat->step*row))[col];
    else
    {
        assert( type == CV_64FC1 );
        return ((double*)(void*)(mat->data.ptr + (size_t)mat->step*row))[col];
    }
} CV_INLINE  void  cvmSet( CvMat* mat, int row, int col, double value )
{
    int type;
    type = CV_MAT_TYPE(mat->type);
    assert( (unsigned)row < (unsigned)mat->rows &&
            (unsigned)col < (unsigned)mat->cols );     if( type == CV_32FC1 )
        ((float*)(void*)(mat->data.ptr + (size_t)mat->step*row))[col] = (float)value;
    else
    {
        assert( type == CV_64FC1 );
        ((double*)(void*)(mat->data.ptr + (size_t)mat->step*row))[col] = (double)value;
    }
}

typedef struct CvMatND
{
    int type;
    int dims;     int* refcount;
    int hdr_refcount;     union
    {
        uchar* ptr;
        float* fl;
        double* db;
        int* i;
        short* s;
    } data;     struct
    {
        int size;
        int step;
    }
    dim[CV_MAX_DIM];
}
CvMatND;

/* Basic element of the file storage - scalar or collection: */
typedef struct CvFileNode
{
    int tag;
    struct CvTypeInfo* info; /* type information
            (only for user-defined object, for others it is 0) */
    union
    {
        double f; /* scalar floating-point number */
        int i;    /* scalar integer number */
        CvString str; /* text string */
        CvSeq* seq; /* sequence (ordered collection of file nodes) */
        CvFileNodeHash* map; /* map (collection of named file nodes) */
    } data;
}
CvFileNode;
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