C++ 即使imshow工作，也无法imwrite到PNG
有人知道为什么即使我可以C++ 即使imshow工作，也无法imwrite到PNG,c++,opencv,C++,Opencv,有人知道为什么即使我可以imshow存储在grad中的图像，我也不能用imwrite来写它吗？我在网上搜索过，似乎这可能是一个浮点问题，但我不知道有什么方法可以使图像矩阵中的浮点消失 int main( int argc, char** argv ) { cv::Mat src, src_gray; cv::Mat grad; char* window_name = "Sobel Demo - Simple Edge Detector"; int scale =
imshowgradimwriteint main( int argc, char** argv ) {
cv::Mat src, src_gray;
cv::Mat grad;
char* window_name = "Sobel Demo - Simple Edge Detector";
int scale = 1;
int delta = 0;
int ddepth = CV_16S;
int c;
/// Load an image
src = imread("C:/Users/Qi Han/Dropbox/44.jpg" );
if( !src.data ) return -1;
GaussianBlur( src, src, Size(3,3), 0, 0, BORDER_DEFAULT );
/// Convert it to gray
cvtColor( src, src_gray, CV_RGB2GRAY );
/// Create window
namedWindow( window_name, CV_WINDOW_AUTOSIZE );
/// Generate grad_x and grad_y
Mat grad_x, grad_y;
Mat abs_grad_x, abs_grad_y;
/// Gradient X
//Scharr( src_gray, grad_x, ddepth, 1, 0, scale, delta, BORDER_DEFAULT );
Sobel( src_gray, grad_x, ddepth, 1, 0, 3, scale, delta, BORDER_DEFAULT );
convertScaleAbs( grad_x, abs_grad_x );
/// Gradient Y
//Scharr( src_gray, grad_y, ddepth, 0, 1, scale, delta, BORDER_DEFAULT );
Sobel( src_gray, grad_y, ddepth, 0, 1, 3, scale, delta, BORDER_DEFAULT );
convertScaleAbs( grad_y, abs_grad_y );
/// Total Gradient (approximate)
addWeighted( abs_grad_x, 0.5, abs_grad_y, 0.5, 0, grad );
imshow( window_name, grad );
imwrite("C:/Users/Qi Han/Dropbox/aftsobel.png", grad);
return 0;
}
在保存之前，请尝试
imwriteMat:：convertTocvtColor在保存之前，请尝试
imwriteMat:：convertTocvtColor在保存之前，请尝试
imwriteMat:：convertTocvtColor在保存之前，请尝试
imwriteMat:：convertTocvtColor尝试
imwriteimwriteimwriteimwrite