From: <janszymanski12...@gmail.com> Reply-To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> Date: Thursday, September 11, 2014 at 3:35 PM To: "beagleboard@googlegroups.com" <beagleboard@googlegroups.com> Subject: Re: [beagleboard] Re: color ball tracking with opencv on BBB
> I was able to build and install the same version of openCV (2.4.9) on BBB > debian as on my desktop Ubuntu by using an external USB memory stick. > Now I have a problem with changing CPU frequency (as I would like to increase > it from 300MHz to 1GHz) > > debian@beaglebone:~$ cpufreq-info > cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 > Report errors and bugs to cpuf...@vger.kernel.org, please. > analyzing CPU 0: > driver: generic_cpu0 > CPUs which run at the same hardware frequency: 0 > CPUs which need to have their frequency coordinated by software: 0 > maximum transition latency: 300 us. > hardware limits: 300 MHz - 1000 MHz > available frequency steps: 300 MHz, 600 MHz, 800 MHz, 1000 MHz > available cpufreq governors: conservative, ondemand, userspace, powersave, > performance > current policy: frequency should be within 300 MHz and 1000 MHz. > The governor "ondemand" may decide which speed to use > within this range. > current CPU frequency is 300 MHz. > cpufreq stats: 300 MHz:97.20%, 600 MHz:0.20%, 800 MHz:0.06%, 1000 MHz:2.55% > (35) > > debian@beaglebone:~$ sudo cpufreq-set -g GOV > Error setting new values. Common errors: > - Do you have proper administration rights? (super-user?) > - Is the governor you requested available and modprobed? > - Trying to set an invalid policy? > - Trying to set a specific frequency, but userspace governor is not available, > for example because of hardware which cannot be set to a specific frequency > or because the userspace governor isn't loaded? > debian@beaglebone:~$ William just explained how to do this earlier today: sudo cpufreq-set -g performance Regards, John > > > What am I doing wrong? > > Jan > > On Wednesday, 10 September 2014 12:52:11 UTC+10, Brandon I wrote: >> And, here are some compile flags you'll want to include/force: >> http://www.eliteraspberries.com/blog/2013/09/cflags-for-numerical-computing-o >> n-the-beaglebone-black.html >> >> >> On Tue, Sep 9, 2014 at 7:16 PM, Brandon I <brando...@gmail.com <javascript:> >> > wrote: >>> I'm not sure that newer open cv can be compiled on the raspberry or >>> beaglebone due to the limited ram. You'll probably have to cross compile. >>> >>> On Tue, Sep 9, 2014 at 5:56 PM, <janszyma...@gmail.com <javascript:> > >>> wrote: >>>> Thanks for that link, it is very usefull. >>>> In a meantime my attempt to install a newer version of opencv (following >>>> the instructions from here >>>> http://robertcastle.com/2014/02/installing-opencv-on-a-raspberry-pi/0) has >>>> failed firstly with cmake-curses-gui not working (empty database?) and >>>> after that (using command line cmake) the building stopped with a error >>>> message of not enough memory. >>>> Jan >>>> >>>> On Tuesday, September 9, 2014 11:03:58 AM UTC+10, janszyma...@gmail.com >>>> wrote: >>>>> Hi, >>>>> >>>>> I need to implement tracking of color ball with opencv on BBB. >>>>> I have a rev.C BBB with latest (default Debian) including opencv 2.3.1 >>>>> On my desktop Ubuntu I have installed opencv 2.4.9 >>>>> To check the initial performance I used the example webcam program from >>>>> the book "Practical OpenCV" listing 4-4 p.34 playing >>>>> the video from USB camera (Logitech C920) >>>>> I need a resolution of 640x480. >>>>> The problem is with a speed on BBB, having a significant delay. It's good >>>>> on a desktop PC. >>>>> >>>>> I would like to ask for advice how to improve the performance on BBB if >>>>> possible. >>>>> >>>>> Jan >>>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/fTan4VKv1no/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> beagleboard...@googlegroups.com <javascript:> . >>>> For more options, visit https://groups.google.com/d/optout. >>> >> > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
