這一個是在opencv上很常用的資料結構
資料結構都放在/usr/include/opencv/cxtypes.h
/****************************************************************************************\
* Image type (IplImage) *
\****************************************************************************************/
#ifndef HAVE_IPL
/*
* The following definitions (until #endif)
* is an extract from IPL headers.
* Copyright (c) 1995 Intel Corporation.
*/
#define IPL_DEPTH_SIGN 0x80000000
#define IPL_DEPTH_1U 1
#define IPL_DEPTH_8U 8
#define IPL_DEPTH_16U 16
#define IPL_DEPTH_32F 32
#define IPL_DEPTH_8S (IPL_DEPTH_SIGN| 8)
#define IPL_DEPTH_16S (IPL_DEPTH_SIGN|16)
#define IPL_DEPTH_32S (IPL_DEPTH_SIGN|32)
#define IPL_DATA_ORDER_PIXEL 0
#define IPL_DATA_ORDER_PLANE 1
#define IPL_ORIGIN_TL 0
#define IPL_ORIGIN_BL 1
#define IPL_ALIGN_4BYTES 4
#define IPL_ALIGN_8BYTES 8
#define IPL_ALIGN_16BYTES 16
#define IPL_ALIGN_32BYTES 32
#define IPL_ALIGN_DWORD IPL_ALIGN_4BYTES
#define IPL_ALIGN_QWORD IPL_ALIGN_8BYTES
#define IPL_BORDER_CONSTANT 0
#define IPL_BORDER_REPLICATE 1
#define IPL_BORDER_REFLECT 2
#define IPL_BORDER_WRAP 3
typedef struct _IplImage
{
int nSize; /* sizeof(IplImage) */
int ID; /* version (=0)*/
int nChannels; /* Most of OpenCV functions support 1,2,3 or 4 channels */
int alphaChannel; /* ignored by OpenCV */
int depth; /* pixel depth in bits: IPL_DEPTH_8U, IPL_DEPTH_8S, IPL_DEPTH_16S,
IPL_DEPTH_32S, IPL_DEPTH_32F and IPL_DEPTH_64F are supported */
char colorModel[4]; /* ignored by OpenCV */
char channelSeq[4]; /* ditto */
int dataOrder; /* 0 - interleaved color channels, 1 - separate color channels.
cvCreateImage can only create interleaved images */
int origin; /* 0 - top-left origin,
1 - bottom-left origin (Windows bitmaps style) */
int align; /* Alignment of image rows (4 or 8).
OpenCV ignores it and uses widthStep instead */
int width; /* image width in pixels */
int height; /* image height in pixels */
struct _IplROI *roi;/* image ROI. if NULL, the whole image is selected */
struct _IplImage *maskROI; /* must be NULL */
void *imageId; /* ditto */
struct _IplTileInfo *tileInfo; /* ditto */
int imageSize; /* image data size in bytes
(==image->height*image->widthStep
in case of interleaved data)*/
char *imageData; /* pointer to aligned image data */
int widthStep; /* size of aligned image row in bytes */
int BorderMode[4]; /* ignored by OpenCV */
int BorderConst[4]; /* ditto */
char *imageDataOrigin; /* pointer to very origin of image data
(not necessarily aligned) -
needed for correct deallocation */
}
IplImage;
函式都放在/usr/include/opencv/cxcore.h中
/* Returns width and height of array in elements */
(CvSize) cvGetSize( const CvArr* arr );
/usr/include/opencv/highgui.h
/* start capturing frames from camera: index = camera_index + domain_offset (CV_CAP_*) */
(CvCapture*) cvCreateCameraCapture( int index );
/* Returns width and height of array in elements */
CVAPI(CvSize) cvGetSize( const CvArr* arr );
/usr/include/opencv/cxtypes.h
// CvArr就是void
typedef void CvArr;
/* Retrieves raw data of CvMat, IplImage or CvMatND. In the latter case the function raises an error if the array can not be represented as a matrix */
把IplImage轉換成uchar資料陣列
(void) cvGetRawData( const CvArr* arr, uchar** data, int* step CV_DEFAULT(NULL), CvSize* roi_size CV_DEFAULT(NULL));
(void) cvGetImageRawData( const CvArr* arr, uchar** data, int* step CV_DEFAULT(NULL), CvSize* roi_size CV_DEFAULT(NULL));
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