PanoTools NG:
Re: Re: Some more tests on Optimal Cubefaces.
Philipp B. Koch 2008-Nov-01 13:53:16
Hans Nyberg schrieb:
> --- In #removed#, "philipp_koch_als_name_gibts_oft" <pk@...>
> wrote:
>
>> (...)
>>
>> To make it simple: Say, there is an equirectangular image with 1000 x
>> 500 px.
>>
>> 1000 x 0.7 = 700
>> 700 / pi = 222.8169203
>>
>> So, one could shrink the equirectangular image to 700 x 350 px in
>> Photoshop and convert this image to six 222 x 222 px cube faces?
>>
>> (...)
>>
>> Yes and No. You may also do that
>> But If you read my page again you will see that I use the full resolution equirectangular as
>> the source image to convert directly to the cubefaces. Just ignore any default cubefaces by
>> the converter.
>> In that way you are using all your information for the conversion so that you get full
>> quality in all areas of the cubeface.
>>
Ah, ok. So in the example given above one would take the 1000 x 500
equirectangular and convert it directly to cube faces with 222 x 222...
>> Of course the 70% rule is only applicable if you are using the max resolution from your
>> camera as it is the interpolation in the camera which gives you a false resolution.
>>
>> In reality you could probably also already in the Raw converter downsize the original
>> images without loosing any details.
>>
>> (...)
I'm always shooting at best resolution (7.4 MP in my case, with Olympus
E-330 and Olympus fisheye). I'll have to investigate this with my
personal setup.
So, again, thanks for letting me know :-)
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