opencv中有和matlab中conv2一样功能的函数吗?
我正在把一份matlab图像处理的代码翻译成C++代码，用的是opencv的库，现在有一个问题，matlab中的conv2函数在opencv中有没有对应的函数呢？我用的是cvFilter2D，不过结果貌似不对，下面是两个函数分别做卷积的结果：
opencv C++ 代码:
CvMat * Aa = cvCreateMat(2, 2, CV_32FC1);
CvMat * Bb = cvCreateMat(2, 2, CV_32FC1);
CvMat * Cc = cvCreateMat(2, 2, CV_32FC1);
cvSetReal2D(Aa, 0, 0, 1);
cvSetReal2D(Aa, 0, 1, 2);
cvSetReal2D(Aa, 1, 0, 3);
cvSetReal2D(Aa, 1, 1, 4);
cvSetReal2D(Bb, 0, 0, 5);
cvSetReal2D(Bb, 0, 1, 5);
cvSetReal2D(Bb, 1, 0, 5);
cvSetReal2D(Bb, 1, 1, 5);
cvFilter2D(Aa, Cc, Bb);
产生的结果：矩阵 [20 30; 40 50]
MATLAB代码:
怎么样用opencv的函数产生和conv2一样的功能呢?我要实现的是conv2（A,B，‘valid’）的功能。谢谢大家
请叫我OOXX
12 years, 10 months ago
Answers
我自己写的答案如下：
IplImage* cvImgConv2(IplImage* src,CvMat* kernel,ConvolutionType type)
{
IplImage* source;
IplImage* destinate;
if(CONVOLUTION_FULL == type)
{
const int additionalRows = kernel->rows-1;
const int additionalCols = kernel->cols-1;
source = cvCreateImage(cvSize(additionalCols+src->width,additionalRows+src->height),src->depth,src->nChannels);
cvCopyMakeBorder(src,source,cvPoint((additionalCols+1)/2,(additionalRows+1)/2),IPL_BORDER_CONSTANT);
}
else
{
source=cvCloneImage(src);
}
destinate=cvCloneImage(source);
/*CvMat* FlipKernel=cvCloneMat(kernel);
cvFlip(kernel,FlipKernel,-1);*/不知道该不该flip，暂时先不flip
cvFilter2D(source,destinate,kernel);
cvReleaseImage(&source);
//cvReleaseMat(&FlipKernel);
if(CONVOLUTION_VALID == type)
{
IplImage* dst=cvCreateImage(cvSize(src->width-kernel->width+1,src->height-kernel->height+1),src->depth,src->nChannels);
CvRect roi=cvRect(kernel->height/2,kernel->width/2,src->width-kernel->width+1,src->height-kernel->height+1);
dst=cvGetSubImage(destinate,roi);
cvReleaseImage(&destinate);
return dst;
}
else
{
return destinate;
}
}
兄贵都要死
answered 12 years, 10 months ago