Question

Building my code (below) returns error 'imread' is not a member of 'cv'.

I am using:

• Ubuntu 11.04.
• libcv is at 2.1.0-3ubuntu1
• CMake as a build system (with only project(foo) and add_executable(foo main.cpp) in it.)

main.cpp:

#include <opencv/cv.h>
int main(int argc, char **argv) {
     cv::Mat src = cv::imread("frame_original.png", 0);
     return 0;
 }`

What do I need to include to get cv::imread to work?

imread is part of OpenCV 2.1:
http://opencv.willowgarage.com/documentation/cpp/highgui_reading_and_writing_images_and_video.html?highlight=imread#imread
But where is it on my system? What do I need to include? Where can I find the documentation that tells me which header file I need from OpenCV to use a specific function?

Answer 1

You should include opencv/highgui.h.