Re: Dar ruins the final match

On Sep 12, 11:23 am, kipps <k_par...@xxxxxxxxx> wrote:
On Sep 12, 7:54 am, "Andrew Dunford" <adunf...@xxxxxxxxxxx> wrote:



"Geoff Muldoon" <geoff.muld...@xxxxxxxxxxxxxx> wrote in message

news:MPG.215237e859be35229899d4@xxxxxxxxxxxxxxxxxxxxxxxx

Mohan says...
Geoff Muldoon wrote:
Mohan says...
Andrew Dunford wrote:
I've no doubt that they would but what do you actually see in a
slowmo? If they're using high frame speed cameras (say 200 fps)
then
the ball travels about 6" between frames, so if on frame 1 the ball
is
3" in front of the bat and on frame 2 it's 3" behind a very slight
nick would be impossible to see.
So you'd not see a frame where the ball was in contact with the bat,
the hot spot persists for long enough to be seen on the IR camera
used
even it occurs between frames.
True enough, but if the frame before shows a gap between bat and ball
and
the frame after also shows a gap between bat and ball, it is likely
that the
ball passed the bat without touching it.

As far as I'm concerned there was daylight between Tendulkar's bat
and the
ball; no hot spot will convince me otherwise.
I haven't seen this dismissal so can't comment on it. But I must say,
I
admire your ability to take a stand on matters on the basis of what
you
think is right irrespective of players, teams, countries or even
posters
involved. Unfortunately, there are not too many on this forum of whom
it
can be said.

Mohan, Your irony meter is malfunctioning.

GM

Please elaborate.

Andrew's posting is almost certainly a subtle satire aimed at certain
other well known posters here who, regardless of evidence or lack thereof,
fail to ever concede, if the decision is even vaguely marginal, that
Tendulkar may have been correctly given out.

Ah well, looks like I have reached the point where I can no longer post a
genuine opinion. I suppose that's my own fault.

Seriously though, there was no irony intended: my eyes told me that
Tendulkar didn't hit the ball. Having said that, as new technical gadgets
are invented the more we as viewers are being shown 'evidence' (I use the
inverted commas because I know little about the technology behind HotSpot
and have no idea whether or not it is reliable) that the naked eye can't
see. Thus I don't discount the possibility that my eyes aren't up to the
job.

Dunno what all the fuss was about Dravid's caught behind in the same match.
No need for a snicko or a HotSpot there: you could see the deflection off
the bat on the slow-motion replay.

Andrew

A question on the technology, Hawk-Eye or HotSpot or whatever? Is it a
calculated extrapolation, or does the camera take 16000 frames per
second and replay in slomo?
Federer hates it in tennis, he has been correct in most of his
challenges!

Thnx

Hawkeye as used in cricket uses cameras to locate the 3D position of
the ball as a function of time, the trajectory is completed by
extrapolation subsequent to the impact with the pads. I don't know
why Federer dislikes it since it supports his challenges?
Hotspot uses high-end military spec IR cameras to image the batsman,
any impact between the ball and anything else develops a bright spot
caused by the raised temperature due to friction/impact, this bright
spot persists for a few seconds over a number of frames which allows
the operator to identify the location of the impact: bat, pad, glove
or arm etc.

.

Relevant Pages

  • Re: Aleem Dar takes out Brennan and his western Yokels
    ... If they're using high frame speed cameras ... the ball travels about 6" between frames, so if on frame 1 the ... 3" in front of the bat and on frame 2 it's 3" behind a very slight ... other well known posters here who, ...
    (rec.sport.cricket)
  • Re: Aleem Dar takes out Brennan and his western Yokels
    ... If they're using high frame speed cameras ... the ball travels about 6" between frames, so if on frame 1 the ball ... 3" in front of the bat and on frame 2 it's 3" behind a very slight ... other well known posters here who, ...
    (rec.sport.cricket)
  • Re: Aleem Dar takes out Brennan and his western Yokels
    ... If they're using high frame speed cameras ... the ball travels about 6" between frames, so if on frame 1 the ball ... So you'd not see a frame where the ball was in contact with the bat, ... other well known posters here who, regardless of evidence or lack thereof, ...
    (rec.sport.cricket)
  • Re: About absolute reference frame......
    ... straight line (relative to the inertial frame of the centrifuge's ... The centripetal force is real, ... playground ball across the rotating platform while you stand on it. ... usually by measuring acceleration ...
    (sci.physics.relativity)
  • Re: About absolute reference frame......
    ... straight line (relative to the inertial frame of the centrifuge's ... The centripetal force is real, ... playground ball across the rotating platform while you stand on it. ... usually by measuring acceleration ...
    (sci.physics.relativity)