Questions tagged [opencv]

OpenCV, short for Open Source Computer Vision, serves as a dependable library designed for executing real-time computer vision tasks. Don't forget to include a language-specific tag (such as Python or C++) alongside this tag if applicable.

Having trouble importing the OpenCv module into Python

When attempting to run a Python script using OpenVINO, I first type "setupvars" and then execute the script via the command line with "python main.py". However, after doing so, an error message appears: This is what it says: Traceback (most recent call ...

Python code: Transforming points on a contour into a bounding box

Currently, I am analyzing medical images using XML files that contain contour coordinates detailing regions of interest. Despite successfully extracting these points, I am facing challenges in converting them into a bounding box suitable for creating masks ...

Converting the OpenCV GetPerspectiveTransform Matrix to a CSS Matrix: A Step-by-Step Guide

In my Python Open-CV project, I am using a matrix obtained from the library: M = cv2.getPerspectiveTransform(source_points, points) However, this matrix is quite different from the CSS Transform Matrix. Even though they have similar shapes, it seems that ...

The error message "No module named Image" is indicating that there is a missing module in the specified file path build/exe.win-amd64-3.6/scipy/misc

I am working on a Python application for image processing that will be compiled into an EXE file. My tools of choice are tkinter and cx_Freeze. However, I have encountered an error during the process. https://i.stack.imgur.com/ThRs4.jpg Below is the con ...

Looking for a way to locate a reference point within an object for measurement using OpenCV in Python?

Click here to upload an image for reference point identification The task at hand involves measuring the length of a drill bit. If two reference points can be automatically identified, the Euclidean distance formula can then be applied to measure the dist ...

Error: The indentation does not match any outer level of indentation (I am using Sublime Text)

Every time I try to run this script, an error pops up: IndentationError: unindent does not match any outer indentation level. I've attempted to troubleshoot in various code editors such as Sublime and Visual Studio Code, but the issue persists. This is a p ...

Creating a new image by preserving the contents of a bounding box with OpenCV in Python

Currently, I am working on a code snippet that utilizes OpenCV to detect the largest contour or object within an image. The snippet successfully creates the bounding box, but I am looking for the best method to save this bounding box as a separate image ...

The error message "cv2 module not found while exporting Anaconda path" appeared when

Running ubuntu 14.04, I successfully installed OpenCV3. Later on, I added anaconda (python) to the mix. In order to get everything working smoothly, I was instructed to edit ~/.bashrc and export the anaconda path there. Switching to python 2.7.8 resulted ...

I am currently utilizing OpenCV version 4 paired with Python version 3. Can you provide guidance on how to execute this code

# The white region in the image represents the sure foreground area distance_transform = cv2.distanceTransform(opening,cv2.DIST_L2,5) ret, sure_fg = cv2.threshold(distance_transform,0.7*distance_transform.max(),255,0)`enter code here` plt.imshow(sure_fg, ...

Distinguish the dissimilarities between feature detectors and descriptors

While working on my Image Processing - Features descriptors assignment, I encountered an issue regarding the distinction between image detectors and descriptors. Despite attempting to find clarification through Google, I was unable to find any clear diffe ...

Rotating videos with Python using OpenCV

Attempting to rotate the frame image from a live web camera has resulted in an error. The code works fine with saved images on the system but not with the webcam. Any assistance would be greatly appreciated. import cv2.cv as cv import cv2 import numpy as ...

Establishing live video streaming with OpenCV via sockets in Python 3

I am currently working on a project to develop a simple application that can live stream video using Python 3 and OpenCV over a socket. I have limited experience with both OpenCV and socket programming, so any detailed answers would be greatly appreciated. ...

Python: fixing point displacement on google maps caused by the satellite image's angle interferance

Currently, I am utilizing the Google Maps static API to access top view satellite imagery of objects for which I possess surface coordinates (LoD1 / LoD2). It seems that the points are always slightly inaccurate, possibly due to a slight tilt in the satel ...

Is it possible to utilize all 274 available color spaces in CV2 to generate 274 unique variations of a single image?

Need help solving an issue related to the code below. import cv2 import imutils image = cv2.imread("/home/taral/Desktop/blister_main/blister.jpg") flags = [i for i in dir(cv2) if i.startswith('COLOR_')] count = 1 for flag in flags: mode = 'cv2.' ...

Leverage the power of openCv.js within your next.js projects

I am attempting to incorporate openCv.js into my next.js application a. I started the project with: npx create-next-app b. Next, I installed: $ yarn add @techstark/opencv-js c. Imported OpenCV with: import cv from "@techstark/opencv-js" d. Ho ...

Python OpenCV error encountered

Upon running the Python code provided below, an error message popped up: Traceback (most recent call last): File "C:Userssmart-26Desktop예제face.py", line 28, in faces = face_cascade.detectMultiScale(grayframe, 1.1, 3, 0, (30, 30)) cv2. ...

Grouping Closeby Shapes/Enclosing Boxes

I am trying to analyze an image that contains several rectangular shapes that are not very clear: https://i.stack.imgur.com/0JTGP.png My goal is to group these nearby rectangles together to achieve a final output like this: https://i.stack.imgur.com/UWI1 ...

"Looking to integrate opencv.js into your React.js app and wondering how to access the cv instance in your js file? Let's explore the

After downloading the opencv.js file from , I placed it in the public folder of my React app. I also added a script tag to the index.html file. In order to access the cv instance, I added '/* global cv */' at the top of my ReadImage.js file. However, when ...

Guide to including only zeros and keeping non-zero values unchanged in Python's OpenCV

I need assistance with adding a shifted version of an image to the original, while ensuring zeros are left intact. I attempted the following code but encountered some issues. Any help is greatly appreciated! import cv2 import numpy as np #Given image i ...

What is the reason for OpenCV assuming that I am utilizing a calibration rig that is not planar?

Exploring the functionality of OpenCV's calib3d module, I am currently experimenting with a simulated camera rig. To better grasp how it works and performs, I have generated a set of artificial object points in 3D space that correspond to a flat grid ...

Avoiding error messages while attempting to import cv2

Can someone help me understand this error message? I successfully installed opencv using the command "pip install opencv-python" in Python 3 within Jupyter Notebook. import cv2 When I tried to import opencv, I encountered this TypeError: 'numpy._DT ...

Tips for creating curved corners on a polygon using given x and y coordinates

Is there a way to draw a polygon from X, Y coordinates with rounded corners using the points I have? Below is my current code, but I am open to suggestions if there is another library that may work better. Displayed below is my output image generated by ...

What is the process for converting a video feed to fullscreen using OpenCV?

When attempting to apply Canny edge detection, I noticed that the borders of the video are also being detected. How can I remove these borders? I am using the built-in webcam to capture the video and have observed that the original frame contains borders a ...

What steps should I follow to enable Tesseract to recognize the license plate in my Python OpenCV project?

https://i.stack.imgur.com/gurvA.jpghttps://i.stack.imgur.com/L90dj.jpg Everything seems to be working perfectly in my OpenCV code. It successfully identifies the license plate, extracts a black and white version using contours, but unfortunately when I tr ...

Simultaneously managing both stepper motors and a camera

What is the optimal method for simultaneously controlling a stepper motor and camera? Imagine having a camera mounted on a linear stage driven by a stepper motor, with the goal of moving the stage in 1mm increments while capturing an image at the end of e ...

Improper transformation of raw RGB depth image into grayscale

Working with a Python simulation that includes a depth sensor and C++ visualization has been quite challenging for me. The sensor provides an image that needs to be converted to grayscale. https://i.stack.imgur.com/Dmoqm.png To achieve the conversion, I ...

What are the steps to successfully install OpenCV (javascript edition) on Internet Explorer 11?

I'm currently experiencing issues with getting the OpenCV javascript version to function properly on IE11 for contour detection. While my code runs smoothly on all other up-to-date browsers, I am encountering errors such as: TypeError: Object doesn&a ...

I am facing an issue with OpenCV where my video is not streaming or updating. Can anyone help me figure out how

I've encountered an issue with my video feed while attempting object detection following a tutorial. The imshow windows are not updating, they just show the first frame repeatedly. Any ideas on why this might be happening? I'm using cv2.VideoCapt ...

Unable to access image directory on Colab platform

After importing the zip files into the designated directories, I attempted to visualize the images using a random number, but encountered the following error message: Error: OpenCV(4.1.2) /io/opencv/modules/imgproc/src/color.cpp:182: Error: (-215:Assertion ...

Locate the center of the face within the Region of Interest

I want to receive a notification when my face's center enters a specific region of interest (ROI). Can this be detected using openCV? Here is the code I have been working on: import cv2 import sys import numpy as np cascPath = 'haarcascade_frontalface_ ...

Encountered Error Compiling OpenCV 4.2.0 on Ubuntu 18.04: Unable to build target 'modules/videoio/CMakeFiles/opencv_videoio.dir/all' during make process

After following a tutorial at cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D INSTALL_PYTHON_EXAMPLES=ON -D INSTALL_C_EXAMPLES=OFF -D OPENCV_ENABLE_NONFREE=ON -D WITH_CUDA=ON -D WITH_CUDNN=ON -D OPENCV_DNN_CUDA=ON -D ENABLE_FAST_MA ...

Utilizing Python and CV2 for Iterative Horizontal Image Stacking in a Loop

I am trying to vertically stack a series of images in Python using a loop. The goal is to add the images one by one vertically, starting with an image outside of the loop. Desired Output Format, Actual Output I'm Getting image = cv2.imread(os.path. ...

Generate an empty alpha image using Numpy

I was attempting to generate a transparent alpha image in order to extract data using py-opencv and save it as a PNG file with a transparent background. I experimented with the following code snippets: blank_image = np.zeros((H,W,4), np.uint8) and blan ...

What is the process of changing the alpha channel of an image to white color using OpenCV in Python?

Is there a method to convert PNG and GIF images to JPEG with openCV, while converting the alpha channel to white color? ...

Error Encountered During Custom Object Training in TensorFlow

I am encountering an issue while trying to train a set of images for my research project. The tutorial I have been following, which can be found here, leads me to the following error. Using Python 3.6 and the latest version of TensorFlow (CPU), when attem ...

Tips for modifying pixel values in Python's OpenCV library without the need for traditional for loops

Currently delving into OpenCV in Python and I've encountered an issue. I have a depth image captured from a Kinect camera. This image has a border with pixel values of zero that I need to replace with the maximum value in the image (2880) without resortin ...

What are the steps to set up OpenCV on Python 3.4?

Currently, I am utilizing Python 3.4 via the Anaconda distribution. Unfortunately, I have encountered difficulty in finding Python 3.4 bindings for OpenCV within this setup. Despite attempting to install OpenCV through Cmake from the source files, no suc ...

Pytesseract failing to recognize numbers in an image

Is it possible to utilize pytesseract in order to analyze the image depicted below? Although, it seems that it is categorizing it as "T". Check out the code snippet provided: txt = pytesseract.image_to_string(image, config='-psm 10') ...

What is the process for extracting the background using cv2.BackgroundSubtractorMOG2?

Is it possible to extract the background using cv2.BackgroundSubtractorMOG2 in Python? In simpler terms, is there a method to generate an image by analyzing the past n frames of a video that can serve as the background? ...

Is it possible to utilize a Python function to extract image coordinates?

Is there a method to convert an image like the Pentagon shown below into an array of points (x,y,x1,y1,x2,y2...) in this format: (1,3, 2,6, 6,6, 7,3, 4,1) The coordinate system originates from the top left. While I am aware that OpenCV can be used to conv ...

The journey in Python encounters a bump in the road with OpenCV errors

I recently completed the installation of OpenCV 3 on my Raspberry Pi 2 model B following this tutorial . I came across a code snippet that is compatible with my version of OpenCV and Python (3): from picamera.array import PiRGBArray from picamera import ...

Tips for accessing an IP camera with OpenCV

Having trouble reading an IP camera stream. Currently, I can only view the video through Internet Explorer because of the ActiveX plugin requirement. The camera is located at 192.168.0.8:8000. Take a look at the image below https://i.stack.imgur.com/kvmA9. ...

What are the steps for obtaining the Gaussian filter?

I need to create a Gaussian window with dimensions of m rows and n columns. I have successfully achieved this in one dimension as shown below. from scipy.stats import multivariate_normal multivariate_normal(mean=[1, 5], cov=(2.5)) Now I am looking to ex ...

What are the steps to implement OpenCV for a real-time application?

When it comes to real time systems, a quick and efficient platform is essential. I'm curious about which combination would be best for real time image processing: OpenCV-Python, OpenCV-MVStudio (C++), OpenCV-Matlab, or OpenCV-Java? I've heard abo ...

Utilizing OpenCV with Python to Harness the Power of Your Smartphone Camera via USB

Is there a way to use my iPhone camera with OpenCV in Python? I've tried using cap = cv2.VideoCapture(1), but it doesn't recognize the camera. I know there are alternatives like using the IP address to connect the camera to OpenCV, but I prefer ...

What are the steps for capturing video using openCV in a python program?

I am facing a challenge in figuring out how to capture a video using openCV. While I have managed to display the video on an html template with the existing codes, I am uncertain about which codes are needed to actually record the video. -camera.py- i ...

Python3 method for identifying faulty beans

standard bean sample sample of flawed beans-1 I am trying to differentiate between normal and flawed beans. I attempted to use the Canny method (for edge detection) and other techniques, but I was unsuccessful. Ultimately, I relied on shape analysis (suc ...

Xcode is unable to locate the 'opencv2/opencv.hpp' file

I'm currently utilizing the npm module react-native-perspective-image-cropper which necessitates the installation of opencv2. Within the package's code, opencv2 is imported as follows: #import <opencv2/opencv.hpp> Despite my best efforts, ...

Error encountered during Raspberry Pi build with OpenCV

While attempting to build opencv-3.2.0 on a Raspberry Pi using cmake, I encountered an unusual error during the installation process when it was 99% complete. I didn't make any changes to avoid causing any problems, but it appears to be a simple codi ...

changing the black backdrop with a different picture

I've been experimenting with replacing black pixels in an image with pixels from another image... Here's the code snippet I have come up with: imgFront = cv2.imread('withoutbackground.jpg') imgBack = cv2.imread('background.jpg&ap ...

Issue: In an Angular electron app, a ReferenceError is thrown indicating that 'cv' is

I have been working on a face detection app using OpenCv.js within an Angular electron application. To implement this, I decided to utilize the ng-open-cv module from npm modules. However, when attempting to inject the NgOpenCVService into the constructor ...

What methods can we utilize to create additional sampling points through bilinear interpolation?

Currently, I am working with a grayscale image and am looking to create new sampling points marked in red within the image using bilinear interpolation. Are there any specific formulas or functions available in python that can help me calculate the values ...

resizing opencv and altering RGB colors

When using opencv's resize function, I've noticed that the image tends to get blurred after resizing up and down. Is there a way to prevent this blurring effect and maintain image clarity? I suspect this issue may be related to sampling problems. ...

Understanding how to implement a color map on an image through cv2.LUT

As a beginner with opencv, I am encountering an issue. I have a np.array color and I would like to incorporate it into my image Here is the np.array color that I intend to add turbo_colormap_data = np.array( [[0.18995,0.07176,0.23217], [0.19483,0 ...

Can you explain the significance of the values 1.0/255 and the color (0,0,0) in this code snippet?

I'm curious about the significance of using values like 1.0 / 255 and (0, 0, 0) in this context. Can someone elaborate on their purpose? inpBlob = cv2.dnn.blobFromImage(frame, 1.0 / 255, (inWidth, inHeight), (0, 0, 0), swapRB=False, crop=False) ...

``"Issue: 'remap' function is not recognized within the 'cv' module"`` occurring during the execution of the command "python setup.py install

Currently attempting to set up a face tracking system for Python on Ubuntu using the terminal. I installed the necessary files from the following links: The setup.py version for Linux can be found here: Despite following the steps and navigating to the p ...