opencv Questions
2
Solved
Python beginner here. I'm using python 3.6 and opencv and I'm trying to create a list of rgb values of all colors present in an image. I can read the rgb values of one pixel using cv2.imread follow...
4
Solved
I am just starting with computer vision. While running code I got the following error.
[INFO] loading model...
Traceback (most recent call last):
File "detect_faces_video.py", line 24, in
net =...
Pembroke asked 30/9, 2018 at 7:47
7
trying to install dlib and face_recognition from Ubuntu
taking reference from https://www.learnopencv.com/install-dlib-on-ubuntu/
but after following commands:
i am stuck at:
Building wheels for ...
Chic asked 15/2, 2019 at 17:49
3
Solved
My goal:
My goal is to configure a build of OpenCV 4.5.1-dev with support for cuda, tesseract and QT without any cmake error..
The problem I am having:
I am getting the following error when I press...
Polyhydroxy asked 20/1, 2021 at 16:13
9
Solved
I am working on a object detection project and wanting to process the project with my GPU. I have completed the NVIDIA setup tutorial and everything works fine. My object detection code originally ...
4
I'm trying to create a real time OCR in python using mss and pytesseract.
So far, I've been able to capture my entire screen which has a steady FPS of 30. If I wanted to capture a smaller area of a...
Babe asked 23/2, 2021 at 14:8
11
Solved
How do you capture video from two or more cameras at once (or nearly) with OpenCV, using the Python API?
I have three webcams, all capable of video streaming, located at /dev/video0, /dev/video1, ...
10
Solved
I'm running Kubuntu 11.10 (w/ KDE 4.8)
Before you read all this :
I just want to remove all traces of OpenCV from my system, so I can start afresh..
The whole story
I first installed python-op...
Gearbox asked 14/2, 2012 at 11:38
11
Solved
I am running pylint on an opencv project and I am getting many pylint errors in VS code about members not being present.
Example code:
import cv2
cv2.imshow(....)
Errors obtained:
However ,...
Hast asked 30/5, 2018 at 19:30
2
Solved
I want to measure the width of banana by using these 2 lines. First line is the contour around the banana:
and second line is the middle line of banana:
As you can see in the picture I've tri...
Garwin asked 14/9, 2019 at 1:41
12
Is there a way with Python (maybe with OpenCV or PIL) to continuously grab frames of all or a portion of the screen, at least at 15 fps or more? I've seen it done in other languages, so in theory i...
Narcoma asked 30/1, 2016 at 4:3
2
I'm currently making a recognition program using various feature extractor and various matcher. Using the score from the matcher, I want to create a score threshold which can further determine if i...
Syndesis asked 15/4, 2017 at 7:23
2
Solved
Attached is a picture with curved lines, how can you find the Baseline of the text?
The goal is to get lines like I drew by hand in the following picture:
I tried the following code, but letters ...
Dasilva asked 4/6 at 10:46
5
Solved
I have a python environment (on Windows 10) that uses OpenCV VideoCapture class to connect to multiple usb cameras.
As far as I know, there is no way to identify a specific camera in OpenCV other ...
6
Solved
I want to capture frames from a video with python and opencv and then classify the captured Mat images with tensorflow. The problem is that i don´t know how to convert de Mat format to a 3D Tensor ...
Chiliasm asked 26/10, 2016 at 22:26
15
Solved
I was working on a sign language detection project on jupyter notebook. While running the code for live detection I encountered an error as shown below:
OpenCV(4.5.1) C:\Users\appveyor\AppData\Loc...
6
Solved
Essentially, I've been able to install openCV fine for python but I also want to be able to do it for C++. I was able to install it using my linux distro's package manager (pacman for manjaro which...
Emikoemil asked 20/10, 2019 at 23:19
4
Solved
I am new to python (2.7) and opencv (3.0) (and video streaming/writing in general) so forgive this.
I am using the logitech c920 as my webcam and it can stream video compressed in h264 format so I...
Arcature asked 14/10, 2015 at 20:28
5
I'm trying to test my picamera on thonny python ide on my raspberry pi but i'm getting an error:
Traceback (most recent call last):
File "/home/pi/Documents/Camera_test.py", line 2, in <module...
5
I am learning C++ and OpenCV these days. Given an image, I want to extract its SIFT features. From http://docs.opencv.org/modules/nonfree/doc/feature_detection.html, we can know that OpenCV 2.4.8 h...
6
Solved
I have a webcam video recorder program built with python, opencv and ffmpeg
It works ok except that the color of the video is more blue than the reality. The problem seems to come from color forma...
Priscilapriscilla asked 19/9, 2012 at 21:44
4
Solved
Hi have seen a lot of tutorials how to do simple image stitching using two photos and that is no problem.
But what to do when I want to make a panorama from 4-6 images or more?
I have code that tak...
Ectosarc asked 3/7, 2014 at 20:55
3
Solved
I want to apply a pinch/bulge filter on an image using Python OpenCV. The result should be some kind of this example:
https://pixijs.io/pixi-filters/tools/screenshots/dist/bulge-pinch.gif
I've read...
Firth asked 25/9, 2020 at 15:34
5
I have already installed CMake by pip install cmake and tried to install face_recognition but it still gives me a RuntimeError. I'm using 'Python 3.7.3, x32'
I also tried to install the dlib by pip...
12
Solved
I was trying to install OpenCV4 in a docker on jetson nano. It has jetpack 4.4 s os. The docker was successfully created and Tensorflow is running but while installing OpenCV using pip it is showin...
Midge asked 3/9, 2020 at 22:15
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