Category : opencv

I am a windows user and I used import cv2 after typing pip install opencv-python And it says that in <module> import cv2 ModuleNotFoundError: No module named ‘cv2’ I also tried pip install opencv-python But it said that Requirement already satisfied: opencv-python in c:usersswariappdatalocalprogramspythonpython39-32libsite-packages (4.5.3.56) Requirement already satisfied: numpy>=1.19.3 in c:usersswariappdatalocalprogramspythonpython39-32libsite-packages (from opencv-python) (1.21.2) then ..

Read more

I’m working on my monocular Visual Odometry project. During the triangulation step, i’m trying to compute the reprojection error of world points, computed by triangulatePoints(). However, the values of reprojection error are too high and i don’t know why. This is my function: vector<double> reproject_error(Mat world_points, Mat R, Mat t, Mat cameraMatrix, vector<Point2f> img_points) { ..

Read more

I finally managed to build the opencv4.5.4 library from source but now I’m facing errors that I’m unable to fix. I’m using this medium article as my guide https://medium.com/analytics-vidhya/how-to-install-opencv-for-visual-studio-code-using-ubuntu-os-9398b2f32d53 When I try to execute a simple program that prints the version of opencv installed, it executes without errors. #include <opencv2/opencv.hpp> #include <iostream> int main() { ..

Read more

I followed this link (https://medium.com/analytics-vidhya/how-to-install-opencv-for-visual-studio-code-using-ubuntu-os-9398b2f32d53) to install opencv and I was able to execute it all the way till make -j4 step. At 99%, I get the following error [ 99%] Built target opencv_annotation [ 99%] Built target opencv_visualisation [ 99%] Built target opencv_interactive-calibration [ 99%] Linking CXX executable ../../bin/opencv_version /home/username/miniconda3/envs/ros/bin/../lib/gcc/x86_64-conda-linux-gnu/9.3.0/../../../../x86_64-conda-linux-gnu/bin/ld: warning: libz.so.1, needed by ..

Read more

I am running into the following issue when attempting to use the MatchTemplate function in the GoCV library. Exception 0x20474343 0x17dfa24eb60 0x7ffca1fd59c6 0x7ffca6fd4f99 PC=0x7ffca6fd4f99 runtime: unknown pc 0x7ffca6fd4f99 stack: frame={sp:0x194f1ff0b0, fp:0x0} stack=[0x0,0x194f1ff9e0) … … … goroutine 1 [syscall]: runtime.cgocall(0xcdf650, 0xc000123dc8) C:/Program Files/Go/src/runtime/cgocall.go:156 +0x4a fp=0xc000123da0 sp=0xc000123d68 pc=0xb640aa gocv.io/x/gocv._Cfunc_MatchTemplate(0x17dfa218a30, 0x17dfa24e9b0, 0x17dfa24ea20, 0x5, 0x17dfa24ea90) _cgo_gotypes.go:5195 +0x52 fp=0xc000123dc8 sp=0xc000123da0 ..

Read more