我正在尝试从目录中获取图像,使其成为黑白(灰度),然后将其写入另一个文件。我已经使用OpenCV的C库完成了它,这里是代码
#include <opencv2/opencv.hpp>
using namespace std;
void faktorial(int InSize, uchar *DataIn, uchar *DataOut)
{
for (int i = 0, j = 0; i < InSize; i += 3, j++)
{
DataOut[j] = (DataIn[i] + DataIn[i + 1] + DataIn[i + 2]) / 3;
}
}
int main()
{
char tbLEN[] = "Assassin.jpg";
IplImage* image;
image = cvLoadImage(tbLEN, 1);
IplImage *image2 = cvCreateImage(cvSize(image->width, image->height), IPL_DEPTH_8U, 1);
int height1 = image->height;
int width1 = image->width;
int step = image->widthStep;
int SizeIn = step*height1;
int nChannels = image->nChannels;
uchar* DatIn = (uchar*)image->imageData;
uchar* DatOut = (uchar*)image2->imageData;
faktorial(SizeIn, DatIn, DatOut);
cvNamedWindow("Imagecolor");
cvShowImage("Imagecolor", image);
cvNamedWindow("Gray");
cvShowImage("Gray", image2);
cvWaitKey(0);
return 0;
}
它工作得非常好,但由于C OpenCV已经过时,我试图用C ++做同样的事情,但是输出图像与我的预期完全不同。哪里出错了?另外,在使用 Mat img2(img.rows,img.cols,CV_8UC3)创建空图像时,我做得对吗?
这是代码。
void faktorial(int InSize, uchar *DataIn, uchar *DataOut)
{
for(int i = 0, j = 0; i < InSize; i += 3, j++)
{
DataOut[j] = (DataIn[i] + DataIn[i + 1] + DataIn[i + 2]) / 3;
}
}
int main()
{
Mat img = imread("Assassin.jpg", CV_LOAD_IMAGE_UNCHANGED);
if (img.empty())
{
cout << "Error : Image cannot be loaded..!!" << endl;
return -1;
}
uchar* DataImg = img.data;
int Width = img.cols;
int Height = img.rows;
int Step = img.step;
int SizeInImg = Step * Height;
Mat img2(img.rows,img.cols, CV_8UC3);
uchar* DataImg2 = img2.data;
faktorial(SizeInImg, DataImg, DataImg2);
namedWindow("MyWindow", CV_WINDOW_AUTOSIZE);
imshow("MyWindow", img2);
}
答案 0 :(得分:0)
问题出在这里
Mat img2(img.rows,img.cols, CV_8UC3);
应该是
Mat img2(img.rows,img.cols, CV_8UC1);
您应该使用CV_LOAD_IMAGE_COLOR
代替CV_LOAD_IMAGE_UNCHANGED
Mat img = imread(argv[1], CV_LOAD_IMAGE_COLOR);