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On 4-4-2016 14:26, Stephen wrote:
> On 4/4/2016 1:05 PM, Thomas de Groot wrote:
>>>
>>> It is the metric system. It can be confusing. ;-)
>>>
>>
>> [making a facepalm]
>> Yes, especially when you know that that distance is exactly 1 palm. :-)
>
> It may seem counter-intuitive but because the imperial system is not
> regular. More thought was needed and results were passed through a
> mental double check. Today youngsters can't count.
>
Oh, I believe that.
--
Thomas
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Am 04.04.2016 um 13:41 schrieb Le_Forgeron:
> Le 04/04/2016 12:30, clipka a écrit :
>> Am 03.04.2016 um 22:41 schrieb Le_Forgeron:
>>>> stereo distance (???) //It is calculated the exporter or is declared by the
>>>> user?
>>>
>>> It's the distance between the eyes.
>>> It's about 13 cm usually, for adult human at least.
>>
>> @LanuHum: Don't listen to him -- the French are known to be freaks.
>> Normal people have about half that inter-pupillary distance ;)
>>
> You are probably correct... I do not know where I picked that 13 cm.
I have a hunch: You probably found the value of 6.5 cm somewhere labeled
as the "lateral offset [between the eyes]", which you misinterpreted as
the "lateral offset [between each eye and the midline]", and hence
thought you'd have to multiply it by 2 to get the inter-pupillary distance.
Or maybe someone else did that stunt -- maybe someone not familiar with
the metric system --, published the results, and you picked up that
value without checking.
I probably wouldn't have noticed either, were it not for the fact that I
happen to have measured my own IPD when I set up my Oculus Rift DK2.
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Am 04.04.2016 um 14:05 schrieb Thomas de Groot:
> On 4-4-2016 13:56, Stephen wrote:
>> On 4/4/2016 12:41 PM, Le_Forgeron wrote:
>>> Le 04/04/2016 12:30, clipka a écrit :
>>>> Am 03.04.2016 um 22:41 schrieb Le_Forgeron:
>>>>>> stereo distance (???) //It is calculated the exporter or is
>>>>>> declared by the
>>>>>> user?
>>>>>
>>>>> It's the distance between the eyes.
>>>>> It's about 13 cm usually, for adult human at least.
>>>>
>>>> @LanuHum: Don't listen to him -- the French are known to be freaks.
>>>> Normal people have about half that inter-pupillary distance ;)
>>>>
>>> You are probably correct... I do not know where I picked that 13 cm.
>>>
>>
>> It is the metric system. It can be confusing. ;-)
>>
>
> [making a facepalm]
> Yes, especially when you know that that distance is exactly 1 palm. :-)
Actually, no -- 1 palm is about 7.5 cm, 7.7 cm, 7.4 cm, or exactly 7.62
cm, depending on whether you're an ancient Egyptian, Greek or Roman, or
a semi-modern Englishman. (Or anywhere from 18.2 to 29.3 cm if you're a
17th century continental European.)
The IPD is typically about half a digit short of a palm.
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On 5-4-2016 21:18, clipka wrote:
> Am 04.04.2016 um 14:05 schrieb Thomas de Groot:
>> On 4-4-2016 13:56, Stephen wrote:
>>> On 4/4/2016 12:41 PM, Le_Forgeron wrote:
>>>> Le 04/04/2016 12:30, clipka a écrit :
>>>>> Am 03.04.2016 um 22:41 schrieb Le_Forgeron:
>>>>>>> stereo distance (???) //It is calculated the exporter or is
>>>>>>> declared by the
>>>>>>> user?
>>>>>>
>>>>>> It's the distance between the eyes.
>>>>>> It's about 13 cm usually, for adult human at least.
>>>>>
>>>>> @LanuHum: Don't listen to him -- the French are known to be freaks.
>>>>> Normal people have about half that inter-pupillary distance ;)
>>>>>
>>>> You are probably correct... I do not know where I picked that 13 cm.
>>>>
>>>
>>> It is the metric system. It can be confusing. ;-)
>>>
>>
>> [making a facepalm]
>> Yes, especially when you know that that distance is exactly 1 palm. :-)
>
> Actually, no -- 1 palm is about 7.5 cm, 7.7 cm, 7.4 cm, or exactly 7.62
> cm, depending on whether you're an ancient Egyptian, Greek or Roman, or
> a semi-modern Englishman. (Or anywhere from 18.2 to 29.3 cm if you're a
> 17th century continental European.)
>
> The IPD is typically about half a digit short of a palm.
>
I should have said: a Thomas palm :-)
--
Thomas
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Am 06.04.2016 um 08:43 schrieb Thomas de Groot:
> On 5-4-2016 21:18, clipka wrote:
>> Am 04.04.2016 um 14:05 schrieb Thomas de Groot:
>>> On 4-4-2016 13:56, Stephen wrote:
>>>> On 4/4/2016 12:41 PM, Le_Forgeron wrote:
>>>>> Le 04/04/2016 12:30, clipka a écrit :
>>>>>> Am 03.04.2016 um 22:41 schrieb Le_Forgeron:
>>>>>>>> stereo distance (???) //It is calculated the exporter or is
>>>>>>>> declared by the
>>>>>>>> user?
>>>>>>>
>>>>>>> It's the distance between the eyes.
>>>>>>> It's about 13 cm usually, for adult human at least.
>>>>>>
>>>>>> @LanuHum: Don't listen to him -- the French are known to be freaks.
>>>>>> Normal people have about half that inter-pupillary distance ;)
>>>>>>
>>>>> You are probably correct... I do not know where I picked that 13 cm.
>>>>>
>>>>
>>>> It is the metric system. It can be confusing. ;-)
>>>>
>>>
>>> [making a facepalm]
>>> Yes, especially when you know that that distance is exactly 1 palm. :-)
>>
>> Actually, no -- 1 palm is about 7.5 cm, 7.7 cm, 7.4 cm, or exactly 7.62
>> cm, depending on whether you're an ancient Egyptian, Greek or Roman, or
>> a semi-modern Englishman. (Or anywhere from 18.2 to 29.3 cm if you're a
>> 17th century continental European.)
>>
>> The IPD is typically about half a digit short of a palm.
>>
>
> I should have said: a Thomas palm :-)
Not convinced.
If by "that distance" you meant the IPD, then I would have to conclude
that your palms must be exceptionally slender, even a lot more so than mine.
If by "that distance" you meant those 13 cm, then I would have to
conclude that you either must have "hands like toilet seats" as we say
in German, or that you meant "hand" rather than "palm" (with yours being
reasonably wider than usual).
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On 6-4-2016 13:18, clipka wrote:
> Am 06.04.2016 um 08:43 schrieb Thomas de Groot:
>> On 5-4-2016 21:18, clipka wrote:
>>> Am 04.04.2016 um 14:05 schrieb Thomas de Groot:
>>>> On 4-4-2016 13:56, Stephen wrote:
>>>>> On 4/4/2016 12:41 PM, Le_Forgeron wrote:
>>>>>> Le 04/04/2016 12:30, clipka a écrit :
>>>>>>> Am 03.04.2016 um 22:41 schrieb Le_Forgeron:
>>>>>>>>> stereo distance (???) //It is calculated the exporter or is
>>>>>>>>> declared by the
>>>>>>>>> user?
>>>>>>>>
>>>>>>>> It's the distance between the eyes.
>>>>>>>> It's about 13 cm usually, for adult human at least.
>>>>>>>
>>>>>>> @LanuHum: Don't listen to him -- the French are known to be freaks.
>>>>>>> Normal people have about half that inter-pupillary distance ;)
>>>>>>>
>>>>>> You are probably correct... I do not know where I picked that 13 cm.
>>>>>>
>>>>>
>>>>> It is the metric system. It can be confusing. ;-)
>>>>>
>>>>
>>>> [making a facepalm]
>>>> Yes, especially when you know that that distance is exactly 1 palm. :-)
>>>
>>> Actually, no -- 1 palm is about 7.5 cm, 7.7 cm, 7.4 cm, or exactly 7.62
>>> cm, depending on whether you're an ancient Egyptian, Greek or Roman, or
>>> a semi-modern Englishman. (Or anywhere from 18.2 to 29.3 cm if you're a
>>> 17th century continental European.)
>>>
>>> The IPD is typically about half a digit short of a palm.
>>>
>>
>> I should have said: a Thomas palm :-)
>
> Not convinced.
>
> If by "that distance" you meant the IPD, then I would have to conclude
> that your palms must be exceptionally slender, even a lot more so than mine.
>
> If by "that distance" you meant those 13 cm, then I would have to
> conclude that you either must have "hands like toilet seats" as we say
> in German, or that you meant "hand" rather than "palm" (with yours being
> reasonably wider than usual).
>
Well, making a facepalm (minus thumb) both edges correspond exactly to
my pupils.
--
Thomas
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Am 06.04.2016 um 13:26 schrieb Thomas de Groot:
> Well, making a facepalm (minus thumb) both edges correspond exactly to
> my pupils.
So with your palm in front of your face you can still see everything in
the distance, with no "blind" strip whatsoever?
That's rather unusual.
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On 6-4-2016 14:01, clipka wrote:
> Am 06.04.2016 um 13:26 schrieb Thomas de Groot:
>
>> Well, making a facepalm (minus thumb) both edges correspond exactly to
>> my pupils.
>
> So with your palm in front of your face you can still see everything in
> the distance, with no "blind" strip whatsoever?
>
> That's rather unusual.
>
No, there is of course a blind half for each eye. Palm width=80mm.
--
Thomas
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Am 06.04.2016 um 14:10 schrieb Thomas de Groot:
> On 6-4-2016 14:01, clipka wrote:
>> Am 06.04.2016 um 13:26 schrieb Thomas de Groot:
>>
>>> Well, making a facepalm (minus thumb) both edges correspond exactly to
>>> my pupils.
>>
>> So with your palm in front of your face you can still see everything in
>> the distance, with no "blind" strip whatsoever?
>>
>> That's rather unusual.
>>
>
> No, there is of course a blind half for each eye. Palm width=80mm.
The question is, do the "blind halves" appear to overlap?
If they do overlap even when you look at something in the distance, your
IPD is less than 80mm.
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On 6-4-2016 15:49, clipka wrote:
> Am 06.04.2016 um 14:10 schrieb Thomas de Groot:
>> On 6-4-2016 14:01, clipka wrote:
>>> Am 06.04.2016 um 13:26 schrieb Thomas de Groot:
>>>
>>>> Well, making a facepalm (minus thumb) both edges correspond exactly to
>>>> my pupils.
>>>
>>> So with your palm in front of your face you can still see everything in
>>> the distance, with no "blind" strip whatsoever?
>>>
>>> That's rather unusual.
>>>
>>
>> No, there is of course a blind half for each eye. Palm width=80mm.
>
> The question is, do the "blind halves" appear to overlap?
>
> If they do overlap even when you look at something in the distance, your
> IPD is less than 80mm.
>
Well, I suppose they do.
--
Thomas
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