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| Does recording with no compression give better results? https://forum.ipisoft.com/viewtopic.php?f=2&t=6930 |
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| Author: | plang [ Thu Mar 14, 2013 12:27 am ] |
| Post subject: | Does recording with no compression give better results? |
Hi, Since recording without compression (no background substraction, no jpeg compression) requires more horsepower from the computer, and gives bigger capture files, is it supposed to give better results as well? |
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| Author: | vmaslov [ Thu Mar 14, 2013 2:38 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
Recording without compression requires less CPU power, but more storage speed and capacity. Also, uncompressed depth image may give more accuracy near the floor. Because now the background subtraction algorithm tends to cut off much foot data when the foot is standing on the floor. We will try to reduce this issue in the next update of iPi Recorder. |
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| Author: | Greenlaw [ Thu Mar 14, 2013 3:51 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
Thanks! I'm looking forward to that update. I'm currently wearing hiking shoes or boots that give my feet more bulk and thicker soles that add elevation from the ground--this makes a big difference in feet tracking accuracy but it also stiffens my performance a little because of the extra bulk and weight. G. |
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| Author: | plang [ Thu Mar 14, 2013 4:55 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
Thanks for the reply. Fortunately for me, my system is capable of recording 6 cams without compression. I'll try that. |
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| Author: | vmaslov [ Thu Mar 14, 2013 6:01 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
plang wrote: Thanks for the reply. Fortunately for me, my system is capable of recording 6 cams without compression. I'll try that. This cut-off issue is related only to depth data. For color data the actor clothes just need to be different enough in color from the surroundings. PS Eye recordings will not get any additional accuracy from not compressing. |
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| Author: | plang [ Thu Mar 14, 2013 8:18 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
vmaslov wrote: This cut-off issue is related only to depth data. For color data the actor clothes just need to be different enough in color from the surroundings. PS Eye recordings will not get any additional accuracy from not compressing. Hum, ok! So I'll keep the compression then! Thanks for the info. |
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| Author: | vmaslov [ Mon Mar 18, 2013 10:26 am ] |
| Post subject: | Re: Does recording with no compression give better results? |
vmaslov wrote: Also, uncompressed depth image may give more accuracy near the floor. Because now the background subtraction algorithm tends to cut off much foot data when the foot is standing on the floor. We will try to reduce this issue in the next update of iPi Recorder. Check it out in iPi Recorder 2.1.4.21. If you are still experiencing feet cut-off with this release, try disable compression for depth data. |
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