[Beginner] Recognizing a logo
I am building a 'follow bot' and wanted to use a logo as the target for the bot to follow. Essentially the logo will be on a button that I will stick on my back. The bot runs a Raspberry Pi with...
View Articlei got an error in detectmultiscale while using opencv python i couldn't fix...
View ArticleCan't Play video from file
I'm using [playingvideofromfile](https://docs.opencv.org/3.0-beta/doc/py_tutorials/py_gui/py_video_display/py_video_display.html#display-video) line for line, but using the full path of the file....
View ArticleSelect timeout error when re-plug camera
OS: Ubuntu 16.04 OpenCV v3.2.0 Python v3.5.2 Camera: ICT Issue: Every time after computer reboot or back from sleep, or unplug/plug-in the camera attempt to grab the first frame success, frame =...
View ArticleDetect Slow Gradual Change in Background with Live Video and Python 3?
Hello everyone. How can I go about detecting slow gradual change in a live video? I am experienced with writing Python OpenCV code for motion detection, but not for slow gradual change in live video. I...
View ArticleHow to use MSER in Python
Hi all, I've used MSER from VLfeat toolbox (matlab) and noticed that open cv also has they same method available. From my search on this Q&A I'm sure it's available for C++ but I'm not sure if I...
View Article'cv2.FlannBasedMatcher' object has no attribute 'knnMatches'
The code is for implementation of a SIFT-based algorithm with FLANN matcher on a captured image from webcam. The error for some reason is in the knnMatch where we deal with the captured image. The...
View ArticleRotate an image with text
I have an image as shown  I need to convert this image to correct orientation. How can achieve this? This is the code i wrote, image =...
View ArticleProblem to create an ogg video in python
Hello everybody, I'm trying to create a video with more or less 140 photos. I installed the library in a Raspberry to code in python the program and it's working very well. But when I want to copy this...
View ArticleMultispectral Imagery Tools in OpenCV
I'm curious if OpenCV has support for processing multispectral imagery. I'm working with satellite imagery from RapidEye (5 channels/bands) and WorldView (8 channels/bands) and I'm wondering if it is...
View Articlehow can i upgrade the detection of cv.findContours
i have a problem about encountering a wrong detection with this image ..i've used the cv.equalizeHist to brighten my images but there are some images with darker corners so my code fails to the detect...
View ArticleCreate a grid over image without template matching
Hi all, I have this image:  I was wondering if there was an efficient way of using openCV to create a grid across the image such that the centre of...
View ArticleCreating a mask with roi for vein detection (Python)
Hello I'm currently working in a project in that I have to do a vein detector using IR images, to achieve a better segmentation with my teacher I have to make a mask where in that mask only consider...
View ArticleImporting cv2 through VB for web app
I have a functional python script that performs facial recognition using dlib and opencv. My problem: as soon as I run the python script through VB as a web app, I receive an error "System.Exception:...
View ArticleCant match similar images
Why i cant matching two similar images? images: https://drive.google.com/open?id=1R-aoZ1jTMreozSpNNyStVYRXwFTiVX67 code: https://pastebin.com/LeWmMnLx
View ArticleHow to use a URL as input in OpenCV
My project consists on making some operations on a streaming video in real time thanks to OpenCV using the video URL. I chose to change the color of the video(or its resolution, 2 easy codes) it worked...
View ArticleVideo capture lagging to intolerant extent while working with RTSP in python....
Hi, I am pretty new to FR and lately have been working on a project where, I need to use FaceNet to recognize faces. Everything works fine, except that when I try to capture the Video from an IP...
View ArticlePass Mat to Python Script ?
Hi, I am using OpenCV v2.4.13.6 with C++ in QT Creator. I am trying to pass an OpenCV Mat object to a Python script using Python interpreter. I need to convert the OpenCV Mat to a PyObject so that I...
View ArticleView webcam feed before it takes a snap?
So my code should detect an object with opencv and once it detects it it should take a snap of it. Which it does fine....However it simply goes to the webcam and doesn't show me the webcam feed. When...
View ArticleBbox,confidence=cv.text_TextDetector.detect(inputImage)
How to use this function in opencv Bbox, confidence=cv.text_TextDetector.detect(inputImage)
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