What could be the best way to extract all the cells (round-like contours)?
For example in this image. 
View ArticleCopy one OutputArrayOfArrays object to another
I want to copy one OutputArrayOfArrays object to another. Something like this: void function(OutputArrayOfArrays contour){ std::vector> contours; OutputArrayOfArrays _contour(contours); ....Doing...
View ArticleUsing OpenCV in Python via a C# application
Hello, I'm looking to build a demo for a program that I've written using the Python bindings for OpenCV. I'm writing the demo in C#, and am wondering if anyone has any tips and tricks for when it comes...
View Articlei was making motion detection for detecting alphabets using opencv mnp models
i copied this code from github but its working fine for him but in my case cemera suddenly stops when i remove blue objects from frame File...
View Articlehow to solve cv2.error(-215:Assertion failed)
when i run the programme, it reveals cv2.error: OpenCV(4.0.0) C:\projects\opencv-python\opencv\modules\objdetect\cascadedetect.cpp:1658: error: (-215:Assertion failed) !empty() in function...
View ArticleUsing opencv in Windows with Visual Studio
Hi, i followed the tutorial for Windows users on the official opencv website [here](https://docs.opencv.org/master/d3/d52/tutorial_windows_install.html) but at the end i got some problems. I fixed...
View ArticleOpencv-contrib module Aruco licensing
Hi, I am confused whether the Aruco module comes under 3 clause BSD license or GPLv3 license. In github opencv-contrib repository, 3 clause BSD licese is mentioned in the codes inside...
View ArticleRed color detection not happening on white paper.
I am facing issue regarding red color detection on white paper. As it seems like the red range vary device to device for detecting red color on white paper. On other colors the detection is working...
View ArticleUnable to save video file from camera
Dear all, I am trying to save the greyscale video from the camera but the output video file size is only 5 kb and it is not playable. Does anyone have an idea about this? below is the code snippet....
View Articleopencv4android for 3d reconstruction
Hi, i currently develop an android application regard 3d reconstruction from list of images by using Java. I'm quite confuse to the proper way for the 3d reconstruction steps to be done. Can anyone...
View ArticleExtrinsic landmarks detection from images ?
I am working on a problem of registration of a particular type of medical imaging. To do this, I have to extract extrinsic markers automatically from the images. Take this image as an example: ![image...
View ArticleFocus stacking with C++ are not the same as in Java
Firstly, sorry for my english, it's not my mother tongue I have to implement a system of focus stacking in a software, I found an algorithm on Github in Java and I transcribed it in C ++ but the...
View ArticleMy web camera is not switching on
Iam working on hand gestures project. My web camera is not switching on So any body can please tell me what is the reason
View ArticleSyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in...
code: import cv2 import numpy as np img=cv2.imread("C:\Users\ravik_000\Desktop\photo",1) cv2.imshow('image',img) cv2.waitKey(0) cv2.destroyAllWindows() please tell me what is the reason why im not...
View ArticleHow to add ffmpeg support to Opencv in Conda enviroment on Linux?
I am trying to read a video with OpenCV after I downloaded with youtube-dl, all this on conda enviroment. But always it shows me " Error opening video stream or file". After of looking for a solution,...
View ArticleWhy 'imencode' taking so long ?
I'm encoding my image from a opencv "Mat" to a "vector" buffer in order to send it over a socket. int rows = 4096; int cols = 4096; vector buffer; Mat imageFrame(rows, cols, CV_8UC1, dataPointer ); /*...
View ArticleThere is no cv2 module in apk
Good afternoon, there is a small application written using python, kivy and opencv. The buildozer builds without errors, but when I launch the application on the phone it crashes with the following...
View ArticleOpenCV3.2.0 compilation linker error using cmake
I had recently by a mistake of mine, deleted the /usr/local/ folder and with it all of the binaries that were built by me contained in it. I had to reinstall the OpenCV and had to build caffe again...
View ArticleJava Opencv: Source doesnt open after runnable export
Hello! I have created an application that displays video feeds from multiple IP Cameras. It works in eclipse, it exports fine too but for some reason after the export the cameras don't open. I had the...
View ArticleI am trying to detect red color using inRange keyword. But I cannot check it...
1. Mat1b mask1, mask2; 2. inRange(hsv, Scalar(173, 70, 50), Scalar(179, 255, 255), mask1); 3. imshow("RedDetect", mask1);
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