i m reading path from textbox and then tried to open image
String^ P = path->Text;
IplImage* img = cvLoadImage(P);
It gives me the following error Error 1 error C2664: 'cvLoadImage' : cannot convert parameter 1 from 'System::String ^' to 'const char *'
Can anyone tell me how to convert it to char *.
To solve your problem, please first follow peoples guidance in your other topics and use the C++ interface!
For windows, the forms indeed use a terrible format, in a specified protected string format, but translating them to a Mat element container (which is used in C++ - api of openCV) can be done straightforward by this approach.
String^ temp_input = textbox_you_want_to_retrieve->Text;
IntPtr pointer_to_text_string = Marshal::StringToHGlobalAnsi(temp_input);
const char* string_for_opencv = static_cast<const char*>(pointer_to_text_string.ToPointer());
Mat image = imread(string_for_opencv);
This code will need you to do one more thing, to be able to use the marshalling functionality and that is to add the following on top of your header:
using namespace System::Runtime::InteropServices;
Or you can just print that complete command in front of the marchalling operations.
Asked: 2013-10-16 22:14:56 -0600
Seen: 2,276 times
Last updated: Oct 20 '13
I have not worked on Windows Form applications, but what you ask for can be found in this link, hope this helps..
http://support.microsoft.com/kb/311259
@Robionic, it is best if you have a solution, that you copy the answer here. If that link dies, noone will find the solution anymore.