Missing opencv_core248d.dll

Question

I'm trying to install OpenCV 2.4.8. Turns out this is far more complicated as expected. The tutorials are all outdated. Here is my current problem:

I'm running on a 64 bit machine, and am trying just a simple sample code:

#include <opencv\cv.h>
#include <opencv\highgui.h>

using namespace cv;


int main() {
    Mat image;

    VideoCapture cap;
    cap.open(0);

    namedWindow("window",1);

    while(true) {

        cap >> image;

        imshow("window", image);

        waitKey(33);
    }


    return 0;
}

When I run this, I get an error stating that opencv_core248d.dll is missing. Checking the bin directory, it's there. How do I fix this?

Regards

Edit: I've been on this issue for the past 3 hours. Whoever can help me solve this issue will get so much rep and love from me...seriously I'm getting desperate

Edit2: Picture of some settings:

OPENCV_BUILD = C:\OpenCV\build\

Answer 1

You are running into OpenCV dll issues, similar to here. Three ways to fix dll-related issues about OpenCV, also works for other dll related issues.

1. copy the required dlls into the same folder with your application. This is a little better because it kind of prepares you for when you'll need to deploy your application on systems that don't have OpenCV installed (for then don't forget to build the release version of your application).

2. add the dll path to Debugging Environment: Project –> Properties –> Configuration Properties –> Debugging –> Environment –> add dlls' paths here. The syntax is NAME=VALUE and macros can be used (for example, $(OutDir)).

   • For example, to prepend C:\Windows\Temp to the PATH: PATH=C:\WINDOWS\Temp;%PATH%

   • Similarly, to append $(SolutionDir)\DLLS to the PATH: PATH=%PATH%;$(SolutionDir)\DLLS

3. add the dll path to Environment Variables (be careful that the path in there are separated by ;)

---

EDIT: Among the three methods, the first two will only work for this project (local) and the last one works for all projects in your PC (global).

Answer 2

Have you tried adding C:\OpenCV2.0\bin to your PATH variables? Yup, installing OpenCV can be a chore :/

Have you done the proper project setup, like adding source library, source directories etc? Anyway, if my guess if right, the following will resolve that particular error:

Go to your project properties, Linker -> Input -> Additional Dependencies, add opencv_core248d.dll in and compile. If a new error appears, means you have yet to do the proper configurations.

EDIT: to comments

Here, the include directories and library directories. Did you add the relevant build/include & \lib into to the include and library directory respectively? This are some of the "configuration" that need to be done.

EDIT2: TO answer your edit

Yup, looks like you did do the configurations. Was confused by your comments.

1) I am not really sure if $(OPENCV_BUILD) will work. Maybe you would like to try C:\OpenCV2.4\lib, (link directly) etc instead of that.

2)Go to your linker input and edit the additional dependencies to this (image from one of the books I have):

Hope it works. And don't worry. I know how you feel. I was stuck at installing OpenCV for almost a week, and only one guy's youtube video saved me. I needed to edit some header files. But it's a different problem from yours. Good luck and hope my method work.

EDIT3: Hopefully this solve your problem, try these.

1) If you are using the "band-aid" method, which means having to copy paste the dll files every time, my suspicion would be that your PATH variables is wrong. Just double check it.

the equivalent for yours would be something like(the path of where you copied the dll files from/the path of the library directories you added inside the property page. But instead of lib at the end, you use the bin folder):

C:\OpenCV2.3\build\x86\vc10\bin

More details on this : Setting window path

If you have done this, just check that you have separated them with a semi-colon.

2) Not sure if this is really the solution for missing .dll file, if I remember correctly, it's more for linking errors. But give it a shot if step 1 doesn't work, or if step one works and you face another error. At the most, you can just undo it.

For each header files, for instance the core.hpp file, add the following lines:

#pragma comment(lib,"opencv_core248.lib")
#pragma comment(lib,"opencv_core248d.lib")

This need to be done for all the header files you use. Where to place it? I place mine here:

This goes the same for highgui.hpp, etc, but you change the name, so #pragma comment(lib,"opencv_core248.lib") becomes #pragma comment(lib,"opencv_highgui248.lib", etc...

Hope all goes well. I think if the path variable, but if not and 2nd method doesn't work, I have no clues anymore.