What is the best way to get the size and speed of a bubble in a video using...
Hello everyone, I am trying to determine the size and speed of bubbles in a video using python, I have found different ways such as imageIA (ImageAI: Video Object Detection, Tracking and Analysis) or...
View Articlehow to save video from YOLO in opencv
i am trying to save the video with detected objects,it saves the video but dont show any detected object. CODE is import cv2 from darkflow.net.build import TFNet import numpy as np import time import...
View ArticleHow can I send video stream
Hello, I have a wifi camera, it send rgb565 360*240, I want to create a server with python or c++ that read this video on my computer, any one have an idea on how to do the server? Thanks.
View Articlehow to save and upload video in opencv
I am working on project in which i need to open recorded video from folder i can upload video using opencv code but i want to make code which will open video from folder using file browser and assign...
View Articlesimple blob detector or contour detection
I want to detect circles(almost circles) based on some parameters. cv2.SimpleBlobDetector encapsulates all those attributes like area, circularity, convexity etc. Although all over the web I generally...
View ArticleBasic openCV contour questions
Hi, May I ask that what is the meaning of this line of code: "key=cv2.contourArea" Thank you for reading this post.
View ArticleOpenCV2 Python face recognition camera freeze when launching script
I'm trying to use a script i've found on internet for facial recognition, it all works fine and my face is detected and the program knows who I am. But, i can't have the video when i'm launching the...
View ArticleRe-initializing (correcting) the trackers when using MultiTracker
I'm writing an application in Python and used [this article](https://www.learnopencv.com/multitracker-multiple-object-tracking-using-opencv-c-python/) as an example of how to use the various OpenCV...
View ArticleWhat is the difference stereo calibration and mono calibration ?
Can I use the two cameras separately to calibrate for stereo vision? Do I have to calibrate the two cameras together? What are the functions I use to calibrate tehm separately? What are the functions I...
View ArticleHow to connect to pelco camera using opencv python
I am not able to connect to pelco camera. I installed pelco mobile form playstore in my mobile. It is able to show the live streaming of those demo IP pelco camera. When I took the same IP address...
View ArticleArUco Stereo Camera Calibration Python
I want to calibrate stereo camera with ArUco or ChArUco. I use Python. I couldn't find the sample code. Would you mind helping me ? Thanks.
View ArticleFastNlMeanDenoisingMulti - Faster way, improve time
Hi all, I am working with a set of image .tif where i have to apply a denoise algorithm. I saw the FastNlMeanDenoisingMulti() function of OpenCV and it works very well. The problem is the time the...
View ArticleHow to draw contour lines between every colour?
I have a Numpy array that contains values between 0 and 255. How can I get contour lines between every color and not just 0 and non-zero? My situation is the following  **background image**  **object image** I want to eliminate gray lines in 16 bit image you can...
View ArticleHow to determine intersection points between contour and convex hull
This is my code, where I have computed both contour and convex hull. Now I want to determine the intersection points between the two: # -*- coding: utf-8 -*- """ Created on Thu Dec 26 20:50:00 2019...
View ArticleArUco Stereo Camera Calibration Python
I want to calibrate stereo camera with ArUco or ChArUco. I use Python. I couldn't find the sample code. Would you mind helping me ? Thanks.
View Article[Python] How to apply bilateral filter to Disparity Map ?
I want to apply bilateral filter to improve disparity map.I use python. This filter uses disparity image and input image(image_left or image_right) as input. DisparityBilateralFilter.apply() ;...
View ArticleHow to bring window to front?
When I use `cv2.imshow()` to show a window, it automatically goes behind my IDE window. Is there a way to bring it to the front? This answer from Stack overflow in 2011 suggested no, but maybe in the...
View ArticleOrienting an Object in an image horizontally
I have images of Food Trays oriented in various angles. I would like to make all the trays horizontally oriented. For this I tried finding the longest edge of the tray using hough's transformation and...
View ArticleHow to implement image inpainting to disparity map?
Hello eveyone, I want to improve my depth map. Recommended image inpainting for this. But I don't know how to implement it. Can you help me ?
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