Open Source Computer Vision Library, real time computer vision

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12 views

HDMI image processing [duplicate]

I would like to know if is it possible to process images that came from a HDMI source (not a camera) with Raspberry Pi and OpenCV, even by using the HDMI to CSI-2 bridge (b102) or by using HDMI to ...
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1answer
38 views

Not able to Install openCV 2.4.9 on raspberry pi 2 model B

I am trying to install openCV 2.4.9 on raspberry pi 2 but facing some error regarding libtiff4-dev image format. I have tried with 'libtiff5-dev' also but it is not working. I dont know what the ...
2
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1answer
23 views

Is opencl supported in Raspberry Pi for stereo vision applications?

I am currently using the opencv library for implementing stereo vision on the raspberry pi. A colleague of mine is using an odroid sbc supporting opencl for parallel processing of matrices. Is ...
0
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1answer
68 views

Pi with Arch Linux and OpenCV: errors when running cmake

I have a Pi running a fresh Arch Linux installation and I want to install OpenCV 3, but I am facing an error that I do not have when installing OpenCV on my other computers. I wrote a script that ...
3
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1answer
43 views

Getting started with image processing using opencv in windows and using in raspberry pi

I am learning image processing using opencv in windows. In another project that I am working on, requires the image processing to be done in raspberry pi for object recognition. Since I do not own a ...
3
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0answers
48 views

Raspberry Pi Camera Module slower than Desktop Webcam

I'm using CodeBlock IDE on raspberry pi 2 with raspberry pi camera module to run face detection program (via Haar Cascade). Now I've compared its performance using Microsoft LifeCam (USB connection) ...
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0answers
13 views

Need Advice In knowing the necessary image processing operations to be performed for robot to follow black line over white background [migrated]

I Want to create a raspberry pi based line following robot using image processing. My robot follows black line against white background. What are the image processing operations that are needed to be ...
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0answers
38 views

Unmount USB Camera

I'm working in a Python app with opencv and a USB camera. Sometimes the camera driver throws an exception: OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cvtColor, file ...
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0answers
40 views

Faster way to use Pi camera module with OpenCV C++

I learnt that The pi camera module does not work the same as the USB camera and VideoCapture cap(0) doesn't work with pi camera module. I am using this wrapper to get frames from pi camera module to ...
3
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2answers
247 views

OpenCV display image: window system doesn't support opengl

I have a project which uses the raspberry pi camera and openCV (also: ROS) to do some movement analysis. However, when I want to display the image (with the openCV API or a ROS node), there's an error ...
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0answers
65 views

help with OpenCV on Raspberry Pi 2

I have installed OpenCV 2.4.9 and 3.0 on my Raspberry pi 2. I have done everything as he said in this tutorial https://www.youtube.com/watch?v=_DMqGTsEo30 . But in the end of video he want to start a ...
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0answers
61 views

Corrupt JPEG data: extraneous bytes before marker, OpenCV C++, Raspberry Pi

I am trying to run OpenCV application on Raspberry PI. When video capture from an external camera starts (Logitech C270), the messages below are printed out: Corrupt JPEG data: 1 extemporaneous bytes ...
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0answers
18 views

Making a matplotlib work in an cv environment

I am trying image analysis on the Rpi using opencv and python. For this I am using the two commands source ~/.profile workon cv before doing the work. In this environment, when I try to import ...
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0answers
25 views

Install Opencv on an external Hard Drive

I am new to the raspberry world. I was trying to install opencv on my raspberry pi 2 and when I give the command: wget -O opencv.zip https://github.com/Itseez/opencv/archive/3.0.0.zip I get the ...
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0answers
119 views

Face recognition with USB Camera

How would I go about using face recognition with a USB camera, NOT the Pi Camera Board? A link to a tutorial would be fine. I know it was possible with OpenCV, but is it still, and how? Edit Can I ...
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1answer
69 views

Undefined reference to raspicam::_private::Private_Impl[…]

I am trying to make a project for the Pi B+ using ROS, RaspiCam and OpenCV (in c++). I want to write my code in QTCreator in a Virtual Machine running Ubuntu 14.04, and then transfer the files to my ...
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0answers
71 views

Trying to render image from grayscale camera with OpenCV in C++. Hangs after a few frames

have a grayscale camera (NOT COLOR) and am trying to render the image. I am running on Raspbian, on a Raspberry Pi 2. I've grabbed some code and bared it to a minimum and made some progress: #include ...
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0answers
54 views

what are the differences between opencv and simplecv in raspberry pi 2? [closed]

Should I install opencv or simplecv in raspberry pi 2? I code in python. Are there significant differences between them?
3
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1answer
75 views

Compile GCC for Raspberry Pi 2B - Patches required?

I need to compile a modern version of GCC in order to compile CMake in order to compile OpenCV 3.0.0. So I want to compile a modern and stable version of GCC for the Raspberry Pi 2b. I've read this ...
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1answer
190 views

Very high camera latency with OpenCV

I have an USB camera and the official RPI camera. Both cameras deliver images with a delay of around 5 seconds with OpenCV 3.0 (VideoCapture) on my Raspberry Pi 2. When I run the same application on ...
2
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1answer
22 views

OpenCV release vs development version

I made a simple application with OpenCV for the RPI2. To do so, I installed the 'development' package on my RPI2. sudo apt-get install libopencv-dev python-opencv Now, I want to install my ...
0
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1answer
233 views

Vehicle detection (OpenCV). Arduino or Rasp Pi? [closed]

I am new to open cv, and I'm starting to do a project. I want to use open cv for vehicle detection. I prefer using C++ language. Should I go with Raspberry pi or Arduino ? And why(what are the ...
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2answers
278 views

Pip exception while installing matplotlib on raspberry pi

I am working in a opencv project on the raspberry pi, and im using a virtual environment, but i used pip to install numpy, scipy and other libraries, but when trying to install matplotlib on pip by: ...
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1answer
54 views

Can I Execute a Jar-File that contains JavaCV 1.0 on a Raspberry PI?

Is this possible to run a Jar-File that contains JavaCV 1.0 on a Raspberry PI?
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0answers
181 views

How do I capture images from a Point Grey Camera?

I want to capture images from a Point Grey Chameleon camera through OpenCV with the python language. I know from the following links that this is definitely possible to do. ...
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1answer
71 views

A suitable OS for running a Java application which captures photos and prints them [closed]

I have developed a Java application, which captures photos from a webcam and detects faces (using OpenCV) and prints only the facial area on paper. Now I have to run this app on a Raspberry Pi. I need ...
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1answer
410 views

Access numpy array in openCV

Using the documentation here here, the code import time import picamera import picamera.array import cv2 with picamera.PiCamera() as camera: camera.start_preview() time.sleep(2) with ...
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1answer
89 views

Accessing YUV data in openCV on the RPi [duplicate]

I came across thisquestion and answer which said how to get a numpy array from raspicam, using the PiYUVAnalysis class. I can output the array itself, But i do not know how to view the array as an ...
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0answers
127 views

openalpr error -bash: alpr: command not found

When I type "alpr --help" and entered. Then it shown -bash: alpr: command not found error massage. How to solve this problem? I followed this method to install all the stuff ...
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0answers
73 views

Best way to play and blend videos with Raspberry Pi 2

I'm looking for a way to programatically play and blend two videos (and possibly an image as well) with the Raspberry Pi 2. According to my tests, it is crucial that the lib/framework can use hardware ...
2
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2answers
134 views

Can't connect to the Pi after cloning the SD card

I want to make a new SD card with Raspbian and OpenCV installed. Instead of making it from scratch, I have already done this from another SD card that I use with raspberry. After cloning the SD card, ...
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1answer
207 views

lens for raspberry pi 2 to expand the field of view

Hi all i'm using raspberry pi 2 with raspbian , i'm working on face and eyes detection using opencv and c++ , i want to expand the field of view for the pi official camera module any suggestions will ...
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0answers
80 views

How to use floating point support in raspberry pi 2

I'm using raspberry pi 2 with raspbian and I'm working on face and eyes detection using opencv and c++. I want to improve the performance and the execution of my program and I was wondering if I can ...
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0answers
780 views

Raspicam C++ library — captured image requires several grab()s to be properly bright

Note that I am referring to the C++ library, raspicam (http://www.uco.es/investiga/grupos/ava/node/40), not the raspberry pi camera in general. Unfortunately, I don't have the reputation to make a ...
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0answers
214 views

Problems in getting two camera feeds via an OpenCV python program

I'm running a Ubuntu 14.04 LTS on my RPi 2. I've OpenCV 2.4.9 installed on it. While running a simple camera capture program works fine. Here is a code for it. import numpy as np import cv2 from ...
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1answer
129 views

Kernel throwing up all kinds of errors over night

I am developing a system that uses OpenCV with Python to access the csi camera, and PyGame for the GUI. Due to the nature of the system (security program) it needs to be left unattended pretty much ...
1
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1answer
2k views

Installation OpenCV 3.0 on Raspberry Pi running Debian Wheezy

I need some help to find a tutorial or help installing OpenCV-3.0 on my raspberry pi running debian wheezy. The OS was already pre-installed on the micro-sd. I followed some guides online but it seems ...
2
votes
1answer
789 views

Error loading bc2835-v4l2 driver, Raspberry Pi and OpenCV

disclaimer: I am new to OpenCV and Raspberry Pi, although I have a fair amount of experience with linux systems in general Here is what I am attempting to accomplish: I am trying to use a Raspberry ...
2
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1answer
200 views

OpenCV cv2.VideoCapture(0) is not working well with webcam

I am trying to use a USB webcam for a computer vision project that outputs the diminations of moving object. I installed openCV and tried my python code which it worked perfect on my PC, but when I ...
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1answer
69 views

I try to compile raspicamCV

I try to compile the raspicamCV library from this link. It compiles the raspicam library, but after that it should compile raspicamCV and get this error. Can someone help me in this matter?
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2answers
411 views

How to diagnose problem with OpenCV face tracking

I am attemping to create the pan-tilt face tracker, using Raspberry Pi 2 Raspian Regular Raspberry Pi Camera from an article on the Pimoroni site, and when I run the python code I get about 20 ...
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0answers
151 views

Multiple webcams - cannot open in openCV & corrupted image

I've connected four USB webcams via well powered USB hub to RasPi2. I want to use them in openCV. So I setup a simple program, where I opened the cameras using cvCaptureFromCAM, captured a cv::Mat and ...
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3answers
149 views

Run code on raspberry pi without gui

I am developing an application based project and I am almost done with it. Now I need to covert that to a commercial level product. As it is application specific I want my code to run as soon as I ...
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0answers
69 views

2 scripts need every frame from NOIR camera board at same time

I have two opencv2/Python scripts running at the same time on the same Raspberry PI. A streaming server script based on this, that outputs a live camera feed to the web a motion detection script, ...
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0answers
60 views

Raspberry already compiled opencv no working

I tried to compile opencv but at 55% I get some sort of error about not enough physical memory, so I tried a compiled library for raspberry from this link. After I moved *.so files into ...
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0answers
125 views

cv2.contourArea on SimpleCV blob not working like on desktop

I have identical code running on both the raspberry pi, and my Ubuntu14.04 desktop. import cv,cv2,SimpleCV import numpy as np from SimpleCV import Image img=Image("in.jpg") blobs=img.findBlobs() ...
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0answers
168 views

Importing Lepton Thermal Module video feed into OpenCV on Raspberry pi

I'd like to import the video feed that I can capture from a thermal imagery camera I got off sparkfun for a college project of mine. But, I can't seem to get the ./raspberrypi_video into the Video ...
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0answers
111 views

Webcam doesn't work on Raspberry Pi VIDIOC-QUERYMENU: Invalid Argument

So I wrote an image processing program in Python on my windows computer and it works fine there, but when I try to run it on the Raspberry Pi I get VIDIOC-QUERYMENU: Invalid Argument a bunch of times. ...
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0answers
78 views

Raspberry Pi Cam with opencv

I have captured a stream using pi camera, but I can't find a way to make it as an argument to cv.QueryFrame(). Any help appreciated.
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0answers
512 views

RPi2 Or ODROID-C1 for better OpenCV performance?

I am planning for a project requiring face recognition using OpenCV and got confused between two boards at same price - the Raspberry Pi 2 and ODROID-C1. My question is which board is more suitable ...