Programming :: Opencv Related - Find Out Corresponding Points Of Same Scene On Two Cameras?
May 2, 2011
I've a question regarding two camera images. Suppose I've detected 2d window coordinate of 8 markers of an object in a scene in one camera and detected window coordinates of 10 markers of the same object on another camera.
I've detected the marker. It was easy. Now how do i know which window coordinates on two cameras are the coordinates of same marker? I mean there are markers captured on both cameras and some of them are representing the same marker in both cameras. I just like to know which ones are same on both cameras. Is it possible to find that out using opencv?
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Nov 6, 2010
I'm using a logitech quickcam pro 3000 on Ubuntu 10.04.
When I run a simple program with OpenCV to display the output from a camera I get the following output:
Code:
A window still opens with the output from the camera, but it seems very low quality and has far less pixels then it should. The camera built into my computer runs the same program with no problems.
My code for the program is simply:
Code:
One further note to make is that I still have the bad quality and low number of pixels with the logitech even when using webcam program. I can seem to find any drivers to update or anything though.
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May 24, 2011
finding a tcl code for cognitive wireless network scene
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Jun 29, 2010
<<mod edit: no longer relevant after moving post to new thread>> I'm currently trying to find which web cameras RHEL desktop 5.x supports. Does anybody have a list? (I was searching through hardware.redhat.com, but it is mainly oriented to server and workstation elements)
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Jul 1, 2010
I installed OpenCV and am trying the example programs. When I try to compile like in the tutorial it is not finding highgui.h.I have 64 bit Mint if that helps at all
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Oct 14, 2014
I am a new man on using both of the opencv and debian. In china, few people use debian linux and have nothing paper about how to insall opencv on this os ... Looking for detail step of installation of opencv on this OS?
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Sep 11, 2010
I've written a simple web page and I want it to display live stream from one of my IP cameras. I admit I've never been interested in HTML ... How should I go about this? I can see the stream in browser using following link [URL]
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Oct 14, 2010
I've introduced myself to OpenCV a bit now and can do some of the most basic things with it. My current goal is to have a solid color object (say a red ball) and have a camera be able to find that object. Anybody know of any resources to start learning how to do this? Any tutorials/books? Or is there something I should be searching for instead of color detection and tracking that will give me things more in the right direction?
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Aug 30, 2010
I'm trying to sed out X and Y coordinates from a identify command. I get back from the identify:
Quote:
1015x638+0+0
I need:
Quote:
1015x638
[Code]...
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May 20, 2011
I am new in Linux and Ubuntu. I am using Acer Aspire 4740 laptop. How can i find related drivers for my laptop?
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Jul 22, 2010
I've recently switched over to gnome desktop environment with gnome-shell preview as my compositing manager.Everything is good except for this process xfce4-notifyd which autostarts somehow..
The problem with this process is it acts as the default notification daemon over-riding gnome-shell's built-in notification support and tends to display balloon popups on the top right corner....If i kill this process everything is good.... But on restart it autostarts again somehow..I looked through the items in gnome-session-properties and also in these places:
Code:
/usr/share/autostart
/etc/xdg/autostart
But couldn't find any entries related to xfce4-notifyd.
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Nov 11, 2010
SuSE SLES10, 32 bit. I have an app which crashes with general protection often.
There is message every time in /var/log/messages:
2010-10-22T08:49:49.350476+02:00 HostName kernel: ProgramName[28023] general protection rip:404575 rsp:7fffc5656270 error:0
How do I establish relation between this message and source code? Error was observed on another host where some tests were running, now license is expired and I can't get more info nor core dump. I have to investigate what I have and try to reproduce it locally. Unfortunately original binary was stripped.Now I prepared non-stripped version. Does it has the same addresses for function as original? Is it possible to use symbol information for finding where RIP points to?
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Mar 24, 2011
I want to know that how the break points and watch points work in the GDB. I know the GDB works on symbol table. But would like to know more details of it. How watch points differ from break points.
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Jan 15, 2011
I tried to summarize the this as best as possible in the title. I am writing an initial value problem solver in the most general way possible. I start with an arbitrary number of initial values at arbitrary locations (inside a boundary.) The first part of my program creates a mesh/grid (I am not sure which is the correct nuance), with N points total, that contains all the initial values. My goal is to optimize the mesh such that the spacing is as uniform as possible. My solver seems to work half decently (it needs some more obscure debugging that is not relevant here.)
I am starting with one dimension. I intend to generalize the algorithm to an arbitrary number of dimensions once I get it working consistently. I am writing my code in fortran, but feel free to reply with pseudocode or the language of your choice.Allow me to elaborate with an example:Say I am working on a closed interval [1,10]
xmin=1
xmax=10
Say I have 3 initial points: xmin, 5 and xmax
num_ivc=3
known(num_ivc)=[xmin,5,xmax] //my arrays start at 1. Assume "known" starts sorted
I store my mesh/grid points in an array called coord. Say I want 10 points total in my mesh/grid.
N=10
coord(10)
Remember, all this is arbitrary--except the variable names of course. The algorithm should set coord to {1,2,3,4,5,6,7,8,9,10} Now for a less trivial example:
num_ivc=3
known(num_ivc)=[xmin,5.5,xmax
or just
num_ivc=1
known(num_ivc)=[5.5]
Now, would you have 5 evenly spaced points on the interval [1, 5.5] and 5 evenly spaced points on the interval (5.5, 10]? But there is more space between 1 and 5.5 than between 5.5 and 10. So would you have 6 points on [1, 5.5] followed by 4 on (5.5 to 10]. The key is to minimize the difference in spacing.I have been working on this for 2 days straight and I can assure you it is a lot trickier than it sounds. I have written code that
only works if N is large
only works if N is small
only works if it the known points are close together
[code]....
So as you can see, I have coded the gamut of almost-solutions. I cannot figure out a way to get it to perform equally well in all possible scenarios (that is, create the optimum spacing.)
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Nov 21, 2010
how can I store the output of (ty to colucix for this line)
Code:
xprop -id $(xprop -root | awk '/_NET_ACTIVE_WINDOW(WINDOW)/{print $NF}') | awk '/_NET_WM_PID(CARDINAL)/{print $NF}'
in a variable and then pass the value of that variable to the kill command as the PID to kill?
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Feb 17, 2010
I have created two threads:
Thread 1 and thread 2
In the main thread, i have put up a timer which generates a signal periodically when it expires, which reults in execution going to signal catcher function.when this function is invoked, under certain condition it goes to thread 1 and under another condition it goes to thread 2. The problem lies here that when it goes to thread2,i have a loop to process but it doesnt come out of the loop and hence from thread2, even though timer has expired.
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Jan 5, 2011
I want to get the last term of an unknown-sized text line, by usig the awk command. Is there any variable which points to the last term of a text line ? (obviously, y can obtain that term if i knew how many terms does the line have... i.e. awk '{print $12}' ; if we are talking about a 12-terms text line) I wonder if there is an option like $?, to get the last term.
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Jan 8, 2010
I'm going to write a script that flashes all AccessPoints in our network, with an expect script. Unfortunately the following code doesn't work.
Code:
spawn cat <file> | ssh root@$ip mtd -r -e linux write - linux
cat: invalid option -- o
Try `cat --help' for more information.
So it doesn't understand the pipe thing anymore. Is there a way to get this command working?
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Feb 19, 2010
I have a database with x number of files (192 at the moment, but will vary from time to time). I am going to copy these files to another location on the same server thorugh shell script. Problem with total size of 192 files is approx 900 GB (again this will vary from time to time).
My shell script should calculate the free space available at present in the server on each of the mount point (can be filled till it reaches 95%). Always 5% free space should be available free for future growth.
After calculating, it should prepare another flat file with following details:
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Feb 18, 2011
We have a program that catalogs to 40 different mount points. The program is fine as long as thier is free space on at least one of the 40 mount points. My boss wants me to come up with a script that will email us daily to know how much overall free space is left. I know I can do a df but I don't know how to combine the 40 mount points into a single disk used/disk free report.
The 40 mount points are /dev/mapper/areaxx, xx being 01 to 40.
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Apr 4, 2011
I have one more question about R.I have made a scatter graph, now I need to place a legend describing both data (red points) and lowess line (blue line with yellow triangles).How do I do that?Here is the graph-I have started it this way-> legend("topleft", pch=1, legend="h,srtm", fill=c("red","yellow"))Not sure about that.How do I describe the fill color, line style, etc.?
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May 28, 2011
I am running 10.10 x64. Every time I boot up, after logging in I am getting several error messages to the effect of:
"Cannot find /media/<various mount points>"
such as /media/sdc1, /media/sdc1/Software, etc. I *think* these are coming from Nautilus, which is starting up automatically, but not 100% certain about that. These devices DID exist at one time, but no longer (I changed the mount point). There is still /dev/sdc1 but I don't think that alone has anything to do with it. I see no evidence of them in fstab or /media. I no longer have any shortcuts to them in Nautilus either.
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Aug 4, 2010
I recently made the switch from windows and mac system to fedora 13 64 bit kde, which has been a challenging 6 months, not having a IT background. Anyway, overall now that I am getting the hang of it I really like fedora 13 kde, nice job guys. I have one final obstacle remaining that I have not been able to figure out. I have the necessary rpms for video and sound. I am able to successfully copy video from DVD's and play them from hard drive without issue using VLC. However, when I try to import avi files from my camera's sd memory card, the videos always end up "corrupted" and when repaired do not play sound. Again, I can play AVI's from dvd's fine. Interestingly, I can take the same files from my fedora box and copy them onto a usb stick and transfer them into my mac and they play fine.
I suspect there is a codec issue possibly with VLC, but not sure. I also tried on the default player, but cannot remember the name of that right now and my wife is presently watching her Mary Kay dvd on it as it is hooked up to our TV . My video codec knowledge is pretty basic. Can someone point me in the right direction of what the problem might actually be, another post, something?
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Jun 9, 2010
I need to run Opencv 1.1 or lower to be compatible with the systems at my University where most of my work is done. 9.10 allowed 1.1 through apt, but before that I remember all kinds of nightmares getting OpenCV to run with FFMPEG. If I go back to self-installing 1.1, am I going to have a repeat of those nightmares? I guess a better way to phrase it, is there any way to get opencv 1.1 through aptitude?
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Aug 29, 2009
I have a small issue that I would <3 to get worked out . Here is the skinny of it. I have a laptop running Ubuntu 9.04. It has 3 USB ports. I have 2 Logitec Quickcam 4000's. I am using zoneminder for viewing the cameras. The issue that I am running into is as follows. I can not seem to view both cameras at the same time. If I unplug one of the cameras the other will work fine and vice versa so I know the cameras work.Here is the output of lsusb without the cameras
Code:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
After plugging the cameras in
[Code]...
I looked around on the web using all the google-fu that I have available to me and I just cant seem to find what I am looking for. I was even going to make my first attempt at compiling the driver but I don't really know where to look for info regarding bandwidth limitations...nor do I really know where to place the driver source, and what to do after I make make install .
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Feb 5, 2011
I am learning image processing and hence using opencv-2.2.0. I am following the link [URL] to install this. But even the first command to install build-essential.
Code:
apt-get install build-essential
is giving following errors...
Code:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.
The following information may resolve the situation:
The following packages have unmet dependencies:
build-essential: Depends: gcc (>= 4:4.4.3) but 4:4.4.1-1ubuntu2 is to be installed
Depends: g++ (>= 4:4.4.3) but it is not going to be installed
Depends: dpkg-dev (>= 1.13.5) but it is not going to be installed
E: Broken packages
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Aug 22, 2010
I recently installed openCV using [URL]. I am unable to locate library location to be included while running programs. Does this version of openCV needs libraries to be downloaded externally or they are inbuilt and I am unable to get their location.
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Apr 3, 2010
Does anybody know of any digital cameras that can be controlled via Debian? I'm not speaking of a webcam but a digital camera, and I'd like to be able to send commands to the camera via usb; perhaps by means of a bash script that would take snapshots every x seconds for a total duration of y seconds.
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Jun 19, 2010
I am very new in Linux in general. I installed ubuntu 10.04 in a server that I want to be a CCTV server and record video from my survilience cameras. It was very hard to install the driver (it's a generic card from DX with 4 inputs) but finally it worked.in Xawtv I see the camera, but I need a good software to capture it. I tried to install zoneminder but it's too difficult to me as a newbie in linux. I installed wxCam and it worked, but it's only for one camera, I have two. I need a software that can capture from both cameras in the same time and not so difficult to install like zoneminder.I want something that will just work, just install and run.
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Aug 19, 2010
I have a DVR with a Linux Operating System, I have a problem viewing my cameras from another internet server that is not the Internet Server where my DVR is. For example I have spoken with my internet provider and checked DNS, Gateways, ports and all the numbers that I configue my DVR, which has a Linux Operating System, and even made the updates, but still I cannot view my cameras from outside this same internet provider.
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