我有一些已分配cv::Mat face;
的实际数据,我希望按以下方式执行:
cv::Mat gray_image;
cv::Mat x_gradient_image;
cv::Mat temp;
cv::cvtColor(face, gray_image, CV_RGB2GRAY);
cv::Sobel(gray_image, temp, 1, 1, 0);
cv::convertScaleAbs(temp, x_gradient_image, 1, 0);
这导致程序崩溃,但我在新的C ++ API中假设cv::Mat
对象擅长分配自己的内存。为这些cv::Mat
对象分配内存的最简单方法是什么?
答案 0 :(得分:1)
我在调用Sobel时更改了深度参数,您的代码对我有用:
#include <iostream>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
int main(int argc, const char * argv[]) {
cv::Mat face;
// read an image
if (argc < 2)
face = cv::imread("../../IMG_0080.jpg");
else
face = cv::imread(argv[1]);
if (!face.data) {
std::cout << "Image file not found\n";
return 1;
}
cv::Mat gray_image;
cv::Mat x_gradient_image;
cv::Mat temp;
cv::cvtColor(face, gray_image, CV_RGB2GRAY);
cv::Sobel(gray_image, temp, 5, 1, 0);
cv::convertScaleAbs(temp, x_gradient_image, 1, 0);
// show the image in a window
cv::imshow("so8044872", x_gradient_image);
// wait for key
cv::waitKey(0);
return 0;
}