Questions tagged as 'opencv'

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OpenCV '' Circular buffer overrun '' Stream UDP

I'm trying to capture a video and run it in an OpenCV code, but after a few seconds the video hangs and this error appears: [udp @ 0x1a2d020] Circular buffer overrun. To avoid, increase fifo_size URL option. To survive in such case, use overru...
asked by 11.03.2018 / 20:44
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(Python2.7) OpenCV send frames through socket

I'm trying to send OpenCV frames through sockets, with the code below. The problem is that the video ends up splitting into several rows or columns. I can only run with python2 (2.7) obs: This code is not mine. source: link Client:...
asked by 10.03.2018 / 02:18
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Function circle, how to send the center parameter?

I am sending the center parameter given by (2953,1999) as I show below: circle(imgOr,(2953,1999),224,Scalar(255,0,0)); But it gives the error:    could not convert (0,1999) from 'int' to 'cv :: Point'     
asked by 17.02.2018 / 23:09
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OpenCV problems (python3 and ROS)

I'm using ROS for a project in college, but when I try to use python 3 to call opencv, this problem occurs "ImportError: /opt/ros/kinetic/lib/python2.7/dist-packages/cv2.so: undefined symbol: PyCObject_Type"  I've been trying to resolve for almo...
asked by 13.01.2018 / 22:40
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Object Trainings in OpenCV (Right or wrong)

Personal Hello I'm in a visual computing project here from the company and wanted to know the most experienced in the subject if I'm doing the right thing to train an object. I read a lot and I studied the subject about testing various framew...
asked by 10.12.2017 / 18:01
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Smile detection using opencv on android

Hello, I'm having a hard time doing smilie detection using opencv on android. I can do the detection of faces and eyes very well using haar cascade but only the detection of smiles is not working using this method. private Mat image, originalI...
asked by 31.10.2017 / 19:47
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How to adjust the focus using Opencv and Python?

Hello. I am building a robot that moves through acquired images. However, when it is in motion, it is lost because the image is out of focus. I ask if there is any configuration inside the OpenCV that calibrates this function. Thank you.     
asked by 09.10.2017 / 20:17
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Python2.7 with OpenCV 3.3.0 - VideoCapture problem

I'm running OpenCV 3.3.0. with Python 2.7 on a Windows 7 Professional x64 machine, and when I run the code below, it falls on the prints "Something went wrong" and "Finished ..." import cv2 capture = cv2.VideoCapture("video.mp4") #The video i...
asked by 08.09.2017 / 20:15
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What is the best way to use projection histograms as features in classifiers or NNs without using a resize in the image

I'm doing a digit recognition work on digital displays and I'm looking to use projection histograms as features for some classifiers, however the images are all of different sizes resulting in a different number of features for each image but I...
asked by 06.06.2017 / 19:04
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Error running Android application with OpenCV

I'm trying to open my application on my Smartphone (Motorola G4 Play), but I'm not successful. The following error is shown to me: E/art: No implementation found for void org.opencv.imgproc.Imgproc.Canny_3(long, long, double, double) (tried Ja...
asked by 11.04.2017 / 20:12