1 (edited by pinoyathletics 2017-Nov-09 22:52:59)

Topic: Kinnovea more accurate than Hand Timing

I was a High school and Elementary Coach in Track and Field of Sprinters. We couldn't afford an electronic timekeeping system. So I was using an IPad and iPhone to do video analysis of my athletes. In training and time trials for distances below 250m, we would use Kinovea. Kinovea was particularly handy if athletes blanket finished closely in races.

I got a very good comparisson when I used the software to compare against electronic times.

I started the timer from when the smoke came out of the gun. Its a good video cause you can clearly see the smoke coming out of the gun and a good view of the finish line. Although the camera had a straight view not on an angle.

Womens 100m

Hand Times for this race were 11.9, 12.2
Kinovea Times were 12.20, 12.34, 13.06, 13.16, 13.26
Electronic Times were 12.26, 12.42, 13.06, 13.16,13.44

So not bad Kinovea guessed #1 and #2 within .10 seconds and #3 and #4 accuratley. Compared to hand timing which was .36 and .22 off.

http://pinoyathletics.info/2017/11/06/2 … ial-video/

Re: Kinnovea more accurate than Hand Timing

Very nice! How many frames per second?

Re: Kinnovea more accurate than Hand Timing

I recommend you to check out another great timing software CrossMgr & it's supplementary video version CrossMgrVideo ! Designed for Cycling, but can be used for anything really. Also if you'd like to get more accurate timing, I recommend a fast Basler industrial Camera, which can do hundreds, if not thousands of frames per second. I'm looking forward to programs that can function well with these framerates even if it is possible with a reduced AOI (say 1920x100). Then you can still do timing nicely, even though recognizing, say numbers can be more difficult.

4 (edited by pinoyathletics 2018-Nov-01 21:32:52)

Re: Kinnovea more accurate than Hand Timing

Rksantos

Thanks, i will check out CrossMgr is it free or paid? where can i download a copy?

Does Kinnovea have any other tools i heard they have a new version.

Re: Kinnovea more accurate than Hand Timing

pinoyathletics wrote:

Rksantos

Thanks, i will check out CrossMgr is it free or paid? where can i download a copy?

Does Kinnovea have any other tools i heard they have a new version.

For your purpose a higher speed camera would increase the accuracy.. Though it is difficult to get to below 0.5s reliably without an electronic start of some sort. I’ve been thinking of something like this attached to the Kinovea record / stop recording shortkeys:
https://www.youtube.com/watch?v=txwmD87XSJE&t=5s

One could directly attach a USB HID switch to a electronic start gun or even make a microphone based system where the sound of the start gun would trigger Kinovea to record. Then once you setup the delays correctly (100m sound travel, delay on the USB hub) you could reliably get timing below 0.1s

Re: Kinnovea more accurate than Hand Timing

pinoyathletics wrote:

Rksantos

Thanks, i will check out CrossMgr is it free or paid? where can i download a copy?

Does Kinnovea have any other tools i heard they have a new version.

You can find CrossMgr here:
https://sites.google.com/site/crossmgrsoftware/