我想要过程图像,因此每个像素值将是其值和4个邻居的平均值。具有两种功能差异的平均图像
创建了两个不同的功能:
Mat meanImage(cv::Mat& inputImage)
{
Mat output;
Mat kernel(3,3,CV_32F,0.0);
kernel.at<float>(0,1) = 0.2;
kernel.at<float>(1,0) = 0.2;
kernel.at<float>(1,1) = 0.2;
kernel.at<float>(1,2) = 0.2;
kernel.at<float>(2,1) = 0.2;
filter2D(inputImage,output,-1,kernel);
return output;
}
和:
Mat meanImage2(Mat& inputImage)
{
Mat temp;
Mat output(inputImage.rows,inputImage.cols,inputImage.type());
copyMakeBorder(inputImage,temp,1,1,1,1,BORDER_REPLICATE);
CV_Assert(output.isContinuous());
CV_Assert(temp.isContinuous());
const int len = output.rows * output.cols * output.channels();
const int rowLenTemp = temp.cols * temp.channels();
const int twoRowLenTemp = 2 * rowLenTemp;
const int rowLen = output.cols * output.channels();
uchar* outPtr = output.ptr<uchar>(0);
uchar* tempPtr = temp.ptr<uchar>(0);
for(int i = 0; i < len; ++i)
{
const int a = 6 * (i/rowLen) + 3;
outPtr[i] = (tempPtr[i+rowLenTemp+a] + tempPtr[i+a] +
tempPtr[i+rowLenTemp+a+3] + tempPtr[i+rowLenTemp+a-3] +
tempPtr[i+twoRowLenTemp+a])/5;
}
return output;
}
我认为结果会是一样的。所以我比较了图片:
Mat diff;
compare(meanImg1,meanImg2,diff,CMP_NE);
printf("Difference: %d\n",countNonZero(diff));
imshow("diff",diff);
并获得很多差异。 这个函数有什么区别?
编辑: 差异性的lena图像从Lena
什么是你的图像类型? – cedrou 2013-03-01 16:23:27
类型是CV_UC3。 – krzych 2013-03-01 17:07:20
你的意思是CV _ ** 8 ** UC3? – cedrou 2013-03-01 21:41:48