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Questions tagged [opencv3.0]

OpenCV (Open Source Computer Vision) is a library for real time computer vision. (This tag is for questions about OpenCV 3.0. Use [opencv] for general questions.)

OpenCV is an open source computer vision library

Version 3.0 released in June 2015. Its documentation can be found here.

For more information, see .

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How to make use of OpenCV source codes instead of shared libraries

I have a project at hand which I want to use one of the opencv modules (specifically dnn). Instead of building the dnn module I want to use the source code of this modules in my project. by doing so, I can change the source code live and see the…
PsP
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opencv blob detection, missing some blobs

import cv2 import numpy as np im_m = cv2.imread("primary.png", cv2.IMREAD_GRAYSCALE) # 50, 130 # Otsu's thresholding after Gaussian filtering blur = cv2.GaussianBlur(im_m,(25,25),0) #(thresh, im2) =…
user2538498
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python flask not reading image from ajax POST

I have an ajax post posting and image like so, // fileData is canvas.toDataURL(fileType); $.ajax({ type: 'POST', url: 'http://ip/api', data: fileData, contentType: false, processData: false, mimeType:"multipart/form-data", …
Pavan K
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Multi colour detection does not show centroid more than 1 object, Only show the centroid of Image which had largest pixel

I am still new to OpenCV, i am trying to detect object of multiple colour as well as center of the object. The color i need to detect is Red, Blue and Yellow. My program able to detect different colour, but it can't detect centroid of the same…
Sky
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Human Detection using Hog descriptors using opencv in java

I have successfully read the video from webcam using opencv. Now i want to detect humans from webcam using Hogdescriptors. I have read many opencv tutorials but could not get anything from it and not able to implement it,can any one help me to…
omkarlanghe
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Apply some Filters to an image of car using Open CV C++

am trying to apply some pre process functions to the image of cars for my graduation project License plate recognition but i face an issue the picture looks poor The Orignial image enter image description here 1- Convert to Grayscale. 2- Gaussian…
messi
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Use opencv in python idle

I installed opencv in python3 using pip. It runs well in terminal, but when I try to run it in idle, it cannot import cv2. What could be the solution? I am using vim as my python idle.
Monojit Sarkar
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What is the value of the BGR in OpenCV?

I know black is [0,0,0],and white is [255,255,255]. Red is [0,0,255] ,green is [0,255,0] ,blue is [255,0,0]. How do other colors show?
user9147145
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How do I get Microsoft Visual Studio 2017 to link to the OpenCV 3.4 libraries?

I have downloaded: Microsoft Visual Studio 2017 (14.0) Microsoft Visual C++ 2017 x64 (14.12.25810) And OpenCV 3.4 I try to get this stackoverflow program to…
CL plane guy
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How to generate a mp4(not a avi) file from a number of frames using Python OpenCV?

I am unable to generate a mp4 file from a number of frames, although I can generate avi file. How to get mp4 file instead of avi file # Define the codec and create VideoWriter object.The output is stored in 'outpy.avi' file. import cv2 out =…
Jitendarpal Singn
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Use of different header and same image data in OpenCV C++

I am reading openCV documentation. I read this paragraph: The idea is that each Mat object has its own header, however the matrix may be shared between two instance of them by having their matrix pointers point to the same address. Moreover, the…
Bhawan
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How to compile OpenCV3 using MinGW

I am trying to compile OpenCV3 and put it into Qt project because Qt officially provides MinGW Version, so I didn't use MinGW-w64. I enabled ENABLE_CXX11 and disabled ENABLE_PRECOMPILED_HEADERS in CMake. Now the problem is MinGW does not contain…
JustWe
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OpenCV 3 and threading on Ubuntu

Can OpenCV be made to work with the following code, modified from here: #include #include #include #include using namespace cv; using namespace std; void…
Ken Y-N
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Use IP camera with OPEN CV without internet connection (direct connection to pc)

I am sorry, this might not be the correct platform to ask this kind of question but I couldn't think of any other place . I for one of my project I need to capture some video footage from an outdoor camera using open cv. Actually, its a part of a…
ArkanSaaS
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Getting error in drawing epipolar line from fundamental matrix?

I'm getting an error in drawing epipolar line from fundamental matrix. Snap of my code is: cv::Mat fundamental = cv::findFundamentalMat( cv::Mat(img_corners), // points in first image cv::Mat(prevImg_corners), // points in second…
arti kushwaha
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