Questions tagged [opencv]
OpenCV (Open Source Computer Vision) is a library for real time computer vision. When using this tag, please add a language specific tag (python, c++, ...), if relevant.
opencv
73,555
questions
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Trouble detecting/removing two watermarks that vary location across image dataset
I have a problem with removing watermarks from a collection of images. The watermarks appear near each other but are different (see below). One watermark is a red square and has white text inside of ...
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0
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49
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Using fisheye calibration to solve allsky images using OpenCV (fails)
I am using fisheye calibration to solve chessboard images using OpenCV. It fails for the calibration flag cv2.fisheye.CALIB_RECOMPUTE_EXTRINSIC, so I work around it. But once I get the parameters, the ...
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How to detect and measure small dents on a car body using OpenCV and C++? [closed]
I'm developing a hail damage scanner that detects and measures even the smallest dents on a car body using high-resolution 3D models. I'm using C++ and OpenCV for this purpose. My goal is to ...
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36
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How can I fix this loop to correcttly track and classify objects?
I have this loop where what I want to do is:
detect the objects nad their bb
track them to assign a unique id to each box
check if an object stops
if an object stops, do the classification on this bb ...
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votes
0
answers
31
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Circle detection and implementation of mask using Python [closed]
I am trying to detect cavities in an image and then create a mask. Then I want to use that mask on different images and extract the cavities from the images. I am able to create a general mask, but ...
2
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0
answers
58
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Image Stitching opencv
I'm trying to stitch two images together using OpenCV's Stitcher class, but despite getting good matches between the two images, the stitching process fails. I've checked my code and the matches seem ...
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0
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haar cascade xml file causing issue in loading [closed]
I wrote this simple program of facial recognition in image but haar cascade file is not loading in cascade classifier
import cv2
img = cv2.imread("photo/3.jpg")
grey_img = cv2.cvtColor(img,...
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0
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36
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OpenCV Python: minArea parameter in get_contours function not taking effect [closed]
I am working on a project using OpenCV in Python to process images and detect contours. I have a function get_contours which takes several parameters, including minArea to filter out small contours. ...
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33
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OpenCV Probabilistic and Standard Hough Line Transform giving very different results?
I'm new to CV, and I'm trying to detect an image in a computer screen. My approach is using Hough line transform to get possible edges that form the image. I was wondering why the standard cv2....
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2
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82
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Identify two figures for similarity [closed]
I am trying to find a reliable way to determine the similarity between geometric shapes (polygons).
In one of my approaches, I tried to use the cvopen library and the findContours() and matchShapes() ...
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48
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Problem with barcode detection zbar python
Im trying to detect and decode barcode. My program works well but with this one barcode i have a problem because of weird background. If you know what operations performed on images will be able to ...
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0
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98
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How do I mark the differences between the two pictures with C++?
I want to compare the two images below, but none of the codes I have tried produce any meaningful output. Here are the pictures :
Orginal
Changed
Desired Result
First, the sizes of the pictures are ...
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76
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What's the best/most robust way to check if 2 images are the same or very similar
I have some video recording of my screen where I am drawing some diagrams, but there are a lot of moments where the screen is idle. Because I am using Camtasia, the cursor is not saved directly on the ...
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What is the solution for OpenCV installation error?
When I try to install OpenCV via pip using command pip install opencv-python. I receive this error:
Collecting opencv-python
Using cached opencv-python-4.10.0.84.tar.gz (95.1 MB)
Installing build ...
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1
answer
73
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ImportError: DLL load failed while importing cv2: The specified module could not be found when "import fiftyone" and "import cv2"
I am using Python 3.11.4 and want to install Fiftyone.
I used pip install fiftyone command on Command Prompt. But when I used import fiftyone as fo it reported ImportError: DLL load failed while ...
