This is a test case, the use of c + + from the opencv imread encapsulated into a DLL, then, using c # call, however, the c # call not encapsulated the imread function after finishing all the time, does anyone know what reason is this, thank you!

 
# include 
# include 
# include 
# include 
# include "test. H" 

# pragma comment (lib, "opencv_world310. Lib") 

Using the namespace CV; 
using namespace std; 

Extern "C" __declspec (dllexport) int test () 
{
Mat readImage=imread (" D: \ \ PIC \ \ pic1 JPG "); 
Int rowPic=readImage. Rows; 
Return rowPic; 
} 

Then using c # call

 
[c # code] - Call the test. The DLL 
The namespace testOilDetectionCsharp 
{
Public sealed partial class MainPage: Page 
{
[DllImport (" test. DLL, "CharSet=CharSet. The Unicode)] 
Extern static int test (); 

Public MainPage () 
{
Enclosing InitializeComponent (); 
} 

Private void Button_Click (object sender, RoutedEventArgs e) 
{
The unsafe 
{
Int num=test (); 
TextBox. Text=num. ToString (); 
} 
} 

} 
} 

In theory, the imread function after reading the image data, c # call returns the number of rows images, but in fact did not return the expected value, it always return zero value, don't know why I can't call c # after encapsulation of opencv

CodePudding user response:

The building Lord have the answer, I now also is such

CodePudding user response:

reference 1st floor FSDFCSDFSDF response:

the original poster is the answer, I now also is such

Well, I here appear such problem because opencv compiled version problem, this version is a little problems, in another version can call succeeds, you can try to change a version to see