face_detector freeze at imshow.

[b51]

Hi there, I'm using face detector to detect faces and got a strange problem at cv::imshow.

At first I use face_detector on ros kinetic against opencv 2.4.9, it works fine, but when I trying to use ros-kinetic-opencv3 (version 3.2.0), it get freeze at cv::imshow() in line 799 of face_detection. If I comment out cv::namedWindos() at line 235, then the opencv image windows can show the first image and then get freeze at the second image.

Set do_display_ to false can make detector run normal, but it's not the best solution. I get stuck on this problem about a week and hope someone can help me out. Thanks

[b51]

Finally I found a solution

Comment out line 325, 326
//ros::MultiThreadedSpinner s(2);
//ros::spin(s);

then add
ros::spin();

But I don't know how&why this happened. Can anyone tell me?