Questions tagged as 'opencv'

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Opencv: Optical Flow Farneback method inside a ROI

I'm capturing the optical flow in a video by Farneback's method, but I need to delimit it to be done only in one part, which I must select with the mouse. The problem is similar to this: link Someone has some idea how I can do this, I tried...
asked by 13.08.2018 / 20:20
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how do I save variable values in a mysql database

I'm trying to create a facial recognition system using Opencv to record user access to the school lab but the problem is that I'm not able to save the access time information for each user and neither the image of it at the time that he entered....
asked by 26.07.2018 / 14:01
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OpenCV - C ++ - Raspberry Pi

I want the function to check all the time if there is a fingerprint. If there is, I want it to start the sequential capture scheme (the for nested), but the function I created is not working that way ... void Leitor::iniciarLeitura() {...
asked by 16.07.2018 / 14:34
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Help - C ++ - OpenCV - VS2017 - Raspberry Pi

Can anyone help me with some problems with a project? The project consists of capturing fingerprint images and using OpenCV for future imaging. In this project, I have a Raspberry Pi 2, a camera module, 3 leds for communication with the us...
asked by 16.07.2018 / 04:31
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Error executing this opencv code and image comparison skimage

I'm developing a program that analyzes two videos and removes similar frames using opencv and saves it again, but I've tried a lot of things and the final part that analyzes the similarity and saves, but always a problem and I do not know where...
asked by 13.07.2018 / 02:21
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c ++ sending to command line

I'm trying to use opnecv to track a red ball and print the x and y coordinates on the command line (I'm pretty new to c ++ so I do not know if there's any better place for it) I tried doing this like this: //calcular a posição da b...
asked by 28.05.2018 / 20:58
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Doubts Points Recognition with OpenCv and Dlib

Hello, I want to do facial recognition with Dlib and Open through WebCam but I'm having a Numpy error that I can not solve, if anyone can give me a hint it would be of great help. My Code. import cv2 import dlib def imprimePontos (webcam,...
asked by 02.06.2018 / 22:02
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Use OpenCV in ubuntu c ++

I'm using Ubuntu with OpenCV to develop a computational view method, before I used OpenCV in windows and put the following configuration in qtCreator to recognize OpencCV. INCLUDEPATH += "C:\OpenCV-QT\install\include" LIBS += -L"C:\OpenCV-QT\i...
asked by 09.05.2018 / 15:20
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Is there any function for OpenCV native Plot?

I want to plot a vector that contains error values extracted from a neural network to analyze the curve.     
asked by 01.04.2018 / 02:24
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Error in calling a Python application (+ OpenCv) in Visual Studio 17 (C #)

I'm trying to make a "control panel" that each button will call a Python application (+ OpenCV) but when I run it through the PyCharm IDE, or straight from the folder, it runs perfectly, but when I make the call through Visual 17 , it appears th...
asked by 09.04.2018 / 05:01