4 ms·
I see on issue with this analysis, the use of the TV camera picture a the reference datum. However, that camera has likely many more issues than the finish line
by cycomanic 6y ago
I see on issue with this analysis, the use of the TV camera picture a the reference datum. However, that camera has likely many more issues than the finish line camera. While it looks like the red advertisement is aligned with the camera from that image I don't think this is necessarily the case. It depends on the height of the camera, the angle and possible distortions.
- tomglynch 6y agoWhile I've only inCluded that single image in my analysis, having a look at the video of the full race where they pass the finish line many times it is clear the red sign is aligned with the finish line.
- cycomanic 6y agoThat's not what I mean. You assume that the TV camera is perfectly aligned with the finish line, because that's how you determine the position of the advertisement relative to the line. However, if the TV camera is offset from the finish line, depending on height/focal length/orientation and aberrations of the camera, the line would appear offset relative to the advertisement. Therefore you determine the wrong position of the line compared to the advertisement. That would always be the same for the full video of the race, so watching the race will not change this.
- cycomanic 6y agoI should say that it might not make a difference, but mainly to point out that one needs to be careful as to what exactly we use as our datum.