Category "opencv"

"cv2.error: OpenCV(4.5.5) :-1: error: (-5:Bad argument) in function 'line'"

Traceback (most recent call last): File "C:\Users\Inspiron\PycharmProjects\car\main.py", line 13, in <module> cv2.line(img,(coord[0][0],coord[0][1],

Cannot find module '../build/Release/opencv4nodejs

I am new to OpenCV and node js, trying to learn OpenCV in node js. I came across opencv4nodejs which I found best for learning. I have followed all steps to ins

selective search in cv2 python

I am learning R-CNN, the first step for R-CNN is selective search, I used this algorithm on a sample image from my dataset. Code - ss = cv2.ximgproc.segmentatio

check IPP is enabled or not in opencv

I have system with installed opencv-3.0. I need to check whether IPP is enabled or not in the opencv. How can I check that ?

Finding similar images with different intensities/brightness

Suppose I have images as follows: What would be my options to compare the similarity between the two images? Obviously they are the same image just with diffe

Qt and Intel realsense Getting started

I didn't know where to ask as a beginner. So If you can help... I want to create a project using: Qt 5.15.0 Visual studio 2019 C++ openCV 4.2.0 (if is nece

opencv.imshow will cause jupyter notebook crash

I check other question on google or stackoverflow, they are talking about run cv2.imshow in script, but my code run in jupyter notebook. Here is my configurati

Performane issue for matlab-like reshape in OpenCV

I am translating a Matlab code to OpenCV. The Code Involves lots of reshaping of large Matrices. As the matlab reshape differs from OpenCV you can't just use Op

Determine if a point is inside or outside of a shape with opencv

I have images with white background and simple shapes in them (each image has one shape). I want to determine if a certain point (x,y) is inside the shape or no

CalcOpticalFlowLK camera motion c++

this time i would know how can i calculate for each frame the camera motion in term of x and y pixel coordinates, i've googled and i've found that CalcOpticalFl

Understanding Hierarchy, from findContours opencv

I am trying to understand Hierarchy and findContours, from opencv c++, but am finding it difficult. I did go through this question here, but I still am not abl

JPEG Compression using OpenCV

I'm trying to perform a basic JPEG Compression (DCT + quantization + IDCT) using OpenCV not using entropy-encoding/Huffman-coding. The problem is that after I d

Resize image to maintain aspect ratio in Python, OpenCv

I'd like to get a 1000 x 1000 picture in Python from any input picture so that the input doesn't lose it's aspect ratio. In other words, I want to resize the in

Python OpenCV Contour Tree Hierarchy Structure

I am trying to implement the algorithm found here in python with OpenCV. I am trying to implement the part of the algorithm that remove irrelevant edge boundari

Calculate affine motion model coefficients using OpenCV in C++

In order to correctly represent the camera motion characterization, I have to find different camera operations (such as Zoom, Pan, Rot and Tilt) in a video. The

How to decode mpeg motion vector using OpenCV in C++?

I want to decode the MPEG motion vectors using OpenCV in C++. Is there any function in OpenCV through which we can get this? Brightness may not be constant thro

mat is not a numerical tuple : openCV error

i have write down a code showing error i ma not getting it: Please help: Its showing mat is not a numerical tuple: import cv import cv2 capture = cv2.VideoCap

OpenCV - Apply mask to a color image

How can I apply mask to a color image in latest python binding (cv2)? In previous python binding the simplest way was to use cv.Copy e.g. cv.Copy(dst, src, mas

How to find corner (x, y) coordinate points on image Python OpenCV?

This is a truck container image but from the top view. First, I need to find the rectangle and know each corner position. The goal is to know the dimension of

"cv::VideoCapture::open VIDEOIO(CV_IMAGES): raised OpenCV exception"

When i use the VsCode debugger to run the code i dont get any error at all and everything works fine, but when i try to run the code without the debugger i get