I’m trying to use code from the official openCV tutorial for showing video from webcam using cv2.imshow() in Ubuntu/Python 3.6: And I get the following error for cv2.imshow(): The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, i…
Tag: opencv
OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow
I am running the following code on Raspberry Pi with pi camera, I have the broadcom drivers for it and all, but I am getting an error. Perhaps something to do with the dimensions of the video feed, but I do not know how to set it on Linux. Code: Error: Answer Provide an id to VideoCapture. Also check the
libopencv_core.so.2.4: error adding symbols: DSO missing from command line
I have installed OpenCV 3.3.0 to Ubuntu 16.04. Just want to compile this code. g++ -o main gpu_thresh.cpp ‘pkg-config opencv –cflags –libs’ -lopencv_gpu -lopencv_core g++ -L/usr/local/lib -o main gpu_thresh.cpp ‘pkg-config opencv –cflags –libs’ -lopencv_gpu -lop…
Unable to route webcam video to virtual video device on Linux (via OpenCV)
I would like to put a video overlay onto an incoming webcam stream via OpenCV. As a first step I’m trying to stream the incoming video from a webcam at /dev/video0 to a virtual video device at /dev/video1 (v4l2loopback). Unfortunately I’m not able to forward the webcam stream to the v4l2loopback d…
import cv2 on centos 64 bit
I already copy the cv2 and complete the procedure installing opencv and python and I also think the default python installation is usr/lib64/python2.7 and there is also usr/lib/python2.7 and I also move the cv2 using copy -r usr/lib/python2.7/site-packages/cv2.so to usr/lib64/python2.7/site-packages/ it succe…
java.lang.NullPointerException and return code
I’m running some java binary from bash like: run_me.sh but inside application I get java.lang.NullPointerException, howewer return code is 0, but I need some non zero exit code to understand from bash that application failed. What is the proper way to handle such cases? Update: Here is an exxample of &#…
compiling c++ projects with dlib library on linux
I want to use dlib library for my c++ projects in linux. I have installed it successfully and able to compile and run the .cpp samples files given under the dlib. I have compiled the sample files through the “g++ -std=c++11 -O3 -I.. ../dlib/all/source.cpp -lpthread -lX11 example_program_name.cpp” …
Saving a Video in OpenCV (Linux, Python)
There is an example that works on Windows (original): In Linux program provides: AttributeError: ‘module’ object has no attribute ‘VideoWriter_fourcc’ Help make it work in Linux. Answer I didn’t try but this should work :
OpenCV: Detecting cat with specific color. Trivial?
I have a problem with my cat being bullied by a nabouring cat to the extent that the cat enters our house in the summer and eat our cats food and sleeps in our furniture. My cat is gray and the problem cat is brown. I would like to make an alert system using a WiFi action cam and OpenCV
OpenCV 3.1.0 won’t compile with CMake
I know there are many supposed duplicates for this matter, but since none of the answers worked for me I’d rather ask another question. My project won’t compile with CMake: Found package configuration file: /usr/share/OpenCV/OpenCVConfig.cmake but it set OpenCV_FOUND to FALSE so package “Ope…