But the projection is irrelevant and YES a 6000 x 3000 images regardless of it's projection or content IS 18 megapixels. Stop trying to make issues where none exist.
It's the same as a megapixel, these terms are simply units that represent a quantity just like a litre, gallon, mile, kilometre etc.
http://en.wiktionary.org/wiki/gigapixel
It's like trying to argue how long a mile is based on the type of car and speed I'm driving to cover it.
On 22 Oct 2010, at 09:33, prague wrote:
> in that logic, a 6000x3000 equirect panorama is 18 megapixels.
>
> even though the top and bottom row of pixels (that's 18000 pixels) is in reality TWO pixels in a spherhical projection)
>
> So sorry matt, everything is really not so simple, even if you would like it to be.
>
> --- In #removed#, Matthew Rogers <matthew@...> wrote:
> >
> > No it simply is not, a 6mp camera like the D70 has images which are 3000px x 2000px or 6 million pixels hence 6 megapixels. You can look at it anyway you want but a gigapixel image has to be 1,000,000,000 pixels regardless of the projection, crop etc. If the final image doesn't have a billion pixels then it aint a gigapixel image.
> >
> > I do love how panoramic photographers seem to be addicted to making things more convoluted and more difficult then necessary.
> >
> > Matt
> >
> >
> > On 19 Oct 2010, at 20:39, Christian Bloch wrote:
> >
> > > Right.
> > >
> > > Elaborating my the chain of thought from last night, we could say that a panorama that matches the human visual field with 4 times the resolution of the human eye, is in fact a Gigapixel panorama.
> > >
> > > (200 hFOV x 135 vFOV) x (200 pixels per degree)^2 = 1,080,000,000 pixels.
> > >
> > > Of course, that relies on the fact that Wikipedia is right about the numbers....
> > >
> > > Blochi
> > >
> > > On Oct 19, 2010, at 11:21 AM, Bernhard Vogl wrote:
> > >
> > > > I'm also using the term "pixels per degree" to explain people how
> > > > detailed a panorama actually is. You still can cheat by using another
> > > > projection but it is very useful to explain the difference between a
> > > > large and a small FOV image...
> > > >
> > > > Bernhard
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
[Non-text portions of this message have been removed]
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