Captured 1000 frames in 0.26 seconds
> Shutdown took 0.00 seconds
>
>
> real2m10.965s
> user0m0.033s
> sys0m0.262s
> root@beaglebone:~#
>
>
>
> On Wed, May 25, 2016 at 5:23 PM, Matthew Witherwax
> mailto:ablec...@gma
,
>>
>> I'm a rookie in this linux/opencv area i wouldn't really know what it
>> means, only learning from you. I posted a question
>> https://groups.google.com/forum/#!category-topic/beagleboard/debian/VFuvveM_8Gc
>>
>> looking for a solution becau
is really needed.
[1]: https://www.raspberrypi.org/forums/viewtopic.php?f=31&t=17773
[2]:
https://tequals0.wordpress.com/2014/03/24/libv4l2-error-allocation-conversion-buffer-using-opencv-on-a-pi/
On Mon, May 23, 2016 at 10:25 PM, Matthew Witherwax wrote:
Hi Tinashe,
Pl
ogram equalisation is not available online. I am
> stuck, i need your help.
>
> On Tuesday, 10 September 2013 16:50:46 UTC+2, Matthew Witherwax wrote:
>>
>> Getting another BBB or raspberry pi probably wont help, but a U2 from
>> HardKernel here
>> http://www.ha
an odroid u2 with ubuntu 12.11 and opencv
>>>>> 2.4.6.1.
>>>>> i used the code i found in git
>>>>> :/mdarling39/<https://github.com/mdarling39/LinuxVision/blob/master/OCVCapture.cpp>to
>>>>> capture from a logitech c920. i ran into an
n!
Actually I have spent a lot of time over the years in Houston. Been to a few
Astros games as well.
Gerald
On Thu, Mar 6, 2014 at 9:55 AM, Matthew Witherwax wrote:
Next time you are in Houston, coffee is on me!
On Thursday, March 6, 2014 9:28:06 AM UTC-6, Gerald wrote:
That is my
ent a lot of time over the years in Houston. Been to a
> few Astros games as well.
>
>
> Gerald
>
>
>
> On Thu, Mar 6, 2014 at 9:55 AM, Matthew Witherwax
>
> > wrote:
>
>> Next time you are in Houston, coffee is on me!
>>
>>
>> On T
much.
>>>>
>>>> Thanks
>>>>
>>>>
>>>> On Thu, Mar 6, 2014 at 10:09 AM, Gerald Coley
>>>>
>>>> > wrote:
>>>>
>>>>> Yes you can do that Use the 3.3V to enable the regulators.
>&g
>> Awesome
>>
>> Gerald we are lucky to have you on this mail list and be participating so
>> much.
>>
>> Thanks
>>
>>
>> On Thu, Mar 6, 2014 at 10:09 AM, Gerald Coley wrote:
>>
>>> Yes you can do that Use the 3.3V to enable the
Thanks for all you do Gerald.
On Thu, Mar 6, 2014 at 9:09 AM, Gerald Coley wrote:
> Yes you can do that Use the 3.3V to enable the regulators.
>
> Gerald
>
>
>
> On Thu, Mar 6, 2014 at 9:03 AM, Matthew Witherwax wrote:
>
>> Thanks Gerald. That is exactly th
gt; Eric
>
>
> On Thu, Mar 6, 2014 at 9:58 AM, Gerald Coley wrote:
>
>> I put that in there for a reason. It may not happen all the time, but
>> eventually you could blow up the processor.
>>
>> Gerald
>>
>>
>> On Thu, Mar 6, 2014 at 8:56 AM, Matth
once it is up and running?
On Thu, Mar 6, 2014 at 8:58 AM, Gerald Coley wrote:
> I put that in there for a reason. It may not happen all the time, but
> eventually you could blow up the processor.
>
> Gerald
>
>
> On Thu, Mar 6, 2014 at 8:56 AM, Matthew Witherwax wrote
As part of the Control of Mobile Robotics class offered through Cousera,
the students are building robots based around the BeagleBone Black. The
robot has 5 infrared distance sensors and 2 reflectance sensors used for
odometry. These sensors are connected via voltage dividers to pins 33, 35,
Moon,
OpenCV will report the invalid argument warning when something is not
supported, but should not prevent you from capturing video. Are you
receiving any other errors?
On Wed, Feb 12, 2014 at 7:17 AM, Moon Walker wrote:
> I have the same issue with C270.
> VIDIOC... invalid argument.
>
>
If you bypass OpenCV and capture directly like we did, you should test to
see if you can capture successfully in YUYV format. OpenCV can convert
YUYV to a Mat with less than 3% cpu use. If you capture in MJPEG, you will
see cpu use of 90% or more to convert the image to a Mat. This isn't so
bad
enCV for doing processing on the video. Since I am not just grabbing
>> frames, I can't do something like framegrabber. Is there anyone who has
>> done this and have a solution. I have tried changing settings on v4l
>> before running my code, but have had no luck.
>>
&
Gustavo,
I posted a link to my blog below. I experienced this problem a couple
years ago when I first started with MaxBotix sonars. The datasheet isn't
100% clear, but the serial signal is inverted. That is what the person in
the RPi forum meant about the meaning of the 1s and 0s. You canno
If you contact MaxBotix or check the specs on the Pololu page
http://www.pololu.com/product/723/ you can see it has the following outputs
- Three interfaces (all are active simultaneously):
- Serial output: asynchronous, logic-level, *inverted*, 9600 bps 8N1
- Analog output: (Vcc/51
As an addendum, the circuit in my post would work at 3.3 V as well.
On Tuesday, November 5, 2013 9:12:14 AM UTC-6, Matthew Witherwax wrote:
>
> I believe my blog post http://blog.lemoneerlabs.com/post/Hearing-aidswill
> solve your issue. You need to build an actual inverter (or buy an
I believe my blog post http://blog.lemoneerlabs.com/post/Hearing-aids will
solve your issue. You need to build an actual inverter (or buy an IC to do
it for you).
On Tuesday, November 5, 2013 3:52:54 AM UTC-6, Gustavo Oliveira wrote:
>
> I guess I did some mistake answering back there =P
> It i
Glad to hear our work is helping others. Let us know how your endeavors go.
-Matthew
On Sun, Nov 3, 2013 at 3:22 PM, wrote:
> Excellent, excellent thread! I just purchased my BBB yesterday for a
> personal project, and I've been reading for many many hours how and what
> would be the best way
This blog post might help you
http://blog.lemoneerlabs.com/post/bbb-optimized-opencv-mjpeg-stream
On Saturday, October 19, 2013 8:58:57 PM UTC-5, Walter Schilling wrote:
>
> Is it not possible then to cross compile openCV programs under Ubuntu on
> a desktop and transfer the images to the Beagl
It is absolutely possible. You just need to figure out how to format your
data to send over wifi. I send MJPG frames as a stream over wifi on my
blog here http://blog.lemoneerlabs.com/post/bbb-mjpeg-streaming You could
take a similar approach to send anything you wanted. In my example, you
I am using the TP-LINK TL-WN722N without any issues. I have it on an
*unpowered
*hub with a Logitech C920. I am able to stream the webcam feed over wifi
without problems. I have documented setting up WIFI under Arch Linux at
http://blog.lemoneerlabs.com/post/The-fruits-of-my-labor At that time,
Jim,
Glad to hear your webcam is working. Did you have any issues with the MJPG
frames not being full jpegs? Some people have reported to me that their
webcams do not generate complete jpegs. I have a fix for it, and it would be
nice to have a list of webcams that require it.
Matthew
I have been working on this recently and have posted some articles on my
blog that might help you. In particular you might be interested in
http://blog.lemoneerlabs.com/post/BBB-webcams and
http://blog.lemoneerlabs.com/post/bbb-mjpeg-streaming
Hope these help. I will have more to post soon ba
-o is not used to indicate which frames to convert to OpenCV Mats and
requires an integer argument
should read
-o is now used to indicate which frames to convert to OpenCV Mats and
requires an integer argument
On Thursday, September 26, 2013 6:46:39 AM UTC-5, Matthew Witherwax wrote:
>
>
at 12:55 PM, Matthew Witherwax wrote:
> Mike,
>
> Looking over the code in you document, I noticed some formatting was off
> and I needed to clean up the way I handled processing the subset of the
> frames. I am cleaning things up and will get you a new version shortly.
>
>
&
out.
>
> Thanks again SO much for your help! I look forward to getting feedback on
> the write up.
>
> -Mike
>
>
> On Tuesday, September 24, 2013, Matthew Witherwax wrote:
>
>> Mike,
>>
>> Great write up. When I have some free time, I will replicate y
r suggestions for improvement.
>
> -Mike
>
>
> On Tue, Sep 24, 2013 at 3:52 PM, rh_ wrote:
>
>> On Tue, 24 Sep 2013 13:41:14 -0500
>> Matthew Witherwax
>> wrote:
>>
>> > Richard,
>> >
>> > Please see the post
>> > http
created equal. But I wonder how much can be done via USB.
> Seems to me that image substraction (or whatever the correct term)
> would probably need to happen at the hardware level to get any
> capture rate increase. So maybe there's no way to get a higher
> fr
o me that image substraction (or whatever the correct term)
> would probably need to happen at the hardware level to get any
> capture rate increase. So maybe there's no way to get a higher
> frame rate due to hardware limitations.
>
> >
> > Thanks,
> >
d to go back and clean up
> some notes I took and then I plan to post a step-by-step guide for anybody
> else who wants to replicate what I did.
>
> Thanks,
> -Mike
>
>
> On Sat, Sep 21, 2013 at 4:48 PM, Matthew Witherwax wrote:
>
>> Jon,
>>
>> I hope yo
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