fc2Image是FlyCapture SDK的C语言库中的图片格式，由于在Windows上的MinGW无法编译FlyCapture2的C++库，只能使用C语言库，所以当我们在同时使用OpenCV的图像格式IplImage时，有时候就需要两种格式相互转换。如果需要FlyCapture2 Image和OpenCV IplImage之间的转换，可以参见我之前的博客OpenCV IplImage FlyCapture2 Image Conversion 两种图像类的相互转化。我们先来分别看看两种图像格式的定义：
IplImage:
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; /* " " */ struct _IplTileInfo *tileInfo; /* " " */ 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;
fc2Image:
typedef struct _fc2Image { unsigned int rows; unsigned int cols; unsigned int stride; unsigned char* pData; unsigned int dataSize; unsigned int receivedDataSize; fc2PixelFormat format; fc2BayerTileFormat bayerFormat; fc2ImageImpl imageImpl; } fc2Image;
下面我们来进行相互转换：
1. FlyCapture2 fc2Image OpenCV IplImage
/** * Convert FlyCapture2 fc2Image to OpenCV IplImage type */ IplImage* ConvertFC2ImageToOpenCV(fc2Image* pImage) { IplImage* cvImage = NULL; bool bColor = true; CvSize mySize; mySize.height = pImage->rows; mySize.width = pImage->cols; bool bInitialized = false; fc2Image colorImage; fc2Error error; switch ( pImage->format ) { case FC2_PIXEL_FORMAT_MONO8: cvImage = cvCreateImageHeader(mySize, 8, 1 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 1; bColor = false; break; case FC2_PIXEL_FORMAT_411YUV8: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_422YUV8: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_444YUV8: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_RGB8: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_MONO16: cvImage = cvCreateImageHeader(mySize, 16, 1 ); cvImage->depth = IPL_DEPTH_16U; cvImage->nChannels = 1; bColor = false; break; case FC2_PIXEL_FORMAT_RGB16: cvImage = cvCreateImageHeader(mySize, 16, 3 ); cvImage->depth = IPL_DEPTH_16U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_S_MONO16: cvImage = cvCreateImageHeader(mySize, 16, 1 ); cvImage->depth = IPL_DEPTH_16U; cvImage->nChannels = 1; bColor = false; break; case FC2_PIXEL_FORMAT_S_RGB16: cvImage = cvCreateImageHeader(mySize, 16, 3 ); cvImage->depth = IPL_DEPTH_16U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_RAW8: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_RAW16: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_MONO12: printf("Not supported by OpenCV"); bColor = false; break; case FC2_PIXEL_FORMAT_RAW12: printf("Not supported by OpenCV"); break; case FC2_PIXEL_FORMAT_BGR: cvImage = cvCreateImageHeader(mySize, 8, 3 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 3; break; case FC2_PIXEL_FORMAT_BGRU: cvImage = cvCreateImageHeader(mySize, 8, 4 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 4; break; case FC2_PIXEL_FORMAT_RGBU: cvImage = cvCreateImageHeader(mySize, 8, 4 ); cvImage->depth = IPL_DEPTH_8U; cvImage->nChannels = 4; break; default: printf("Some error occured... "); return NULL; } if(bColor) { error = fc2CreateImage( &colorImage ); if ( error != FC2_ERROR_OK ) { printf( "Error in fc2CreateImage: %d ", error ); } if(!bInitialized) { fc2SetImageData(&colorImage, (unsigned char*)malloc(sizeof(int) * pImage->cols * pImage->rows*3), pImage->cols * pImage->rows*3); bInitialized = true; } fc2ConvertImageTo(FC2_PIXEL_FORMAT_BGR, pImage, &colorImage); //needs to be as BGR to be saved if ( error != FC2_ERROR_OK ) { printf( "Error in fc2ConvertImageTo: %d ", error ); } cvImage->width = colorImage.cols; cvImage->height = colorImage.rows; cvImage->widthStep = colorImage.stride; cvImage->origin = 0; //interleaved color channels cvImage->imageDataOrigin = (char*)colorImage.pData; //DataOrigin and Data same pointer, no ROI cvImage->imageData = (char*)(colorImage.pData); cvImage->widthStep = colorImage.stride; cvImage->nSize = sizeof (IplImage); cvImage->imageSize = cvImage->height * cvImage->widthStep; error = fc2DestroyImage(&colorImage); if ( error != FC2_ERROR_OK ) { printf( "Error in fc2CreateImaged: %d ", error ); return -1; } } else { cvImage->imageDataOrigin = (char*)(pImage->pData); cvImage->imageData = (char*)(pImage->pData); cvImage->widthStep = pImage->stride; cvImage->nSize = sizeof (IplImage); cvImage->imageSize = cvImage->height * cvImage->widthStep; } return cvImage; }
2. OpenCV IplImage to FlyCapture2 fc2Image
/** * Convert OpenCV IplImage to FlyCapture2 fc2Image type */ fc2Image* ConvertIplImageToFC2Image(IplImage* cvImage) { fc2Image* pImage; fc2Error error; fc2BayerTileFormat btf = FC2_BT_GBRG; error = fc2CreateImage(pImage); if ( error != FC2_ERROR_OK ) { printf( "Error in fc2CreateImage: %d ", error ); } if (cvImage->depth == IPL_DEPTH_8U) { if (cvImage->nChannels == 1) error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_PIXEL_FORMAT_MONO8, btf); if (cvImage->nChannels == 3) error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_PIXEL_FORMAT_RGB8, btf); if (cvImage->nChannels == 4) error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_PIXEL_FORMAT_BGRU, btf); } else if (cvImage->depth == IPL_DEPTH_16U) { if (cvImage->nChannels == 1) error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_PIXEL_FORMAT_MONO16, btf); if (cvImage->nChannels == 3) error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_PIXEL_FORMAT_RGB16, btf); } else error = fc2SetImageDimensions(pImage, cvImage->height, cvImage->width, cvImage->widthStep, FC2_UNSPECIFIED_PIXEL_FORMAT, btf); if ( error != FC2_ERROR_OK ) { printf( "Error in fc2SetImageDimensions: %d ", error ); } fc2SetImageData(pImage, (const unsigned char*)cvImage->imageData, cvImage->imageSize); if (error != FC2_ERROR_OK) { printf( "Error in fc2SetImageData: %d ", error ); } return pImage; }