OpenCV imread()问题

Question

我最近安装了OpenCV，我不能使用imread()。

这是我的密码

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main(  )
{
    Mat i=imread("home/ali/opencv/lena.png",1);
    namedWindow("a",WINDOW_FULLSCREEN);
    imshow("a",i);
    waitKey(0);
    return 0;
}

这是我在Qt中的.pro文件

QT += core
QT -= gui

CONFIG += c++11

TARGET = opencv
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

INCLUDEPATH += /usr/local/include/opencv
LIBS += -L/usr/local/lib -lopencv_core -lopencv_imgcodecs -lopencv_highgui -lopencv_imgcodecs


SOURCES += main.cpp

这就是我所收到的：

OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow, file /home/ali/Downloads/opencv/opencv-3.2.0.www.fileniko.com/opencv-3.2.0/modules/highgui/src/window.cpp, line 304
terminate called after throwing an instance of 'cv::Exception'
  what():  /home/ali/Downloads/opencv/opencv-3.2.0.www.fileniko.com/opencv-3.2.0/modules/highgui/src/window.cpp:304: error: (-215) size.width>0 && size.height>0 in function imshow

Press <RETURN> to close this window...
^A

使用opencv3.2 ubuntu qt

Answer 1

这句话提供了正确的解决方案：

所以-到底发生了什么？我猜您的文件路径是无效的(它需要是"/home/ali/opencv/lena.png“-注意前面的/)

- 斯蒂尔·德里弗 7月30日17:17

我改变了道路，它起了作用。