PanoTools:
Re: Re: How many shots with a Nikon 10.5mm?
Sacha Griffin 2006-Jun-04 19:35:22
How do you use selection? Is this something supported in ptgui?
That possible could save a preliminary masking step.
Sacha
> panoramicsdk wrote:
> > When changing the FOV it is always needed
> > to reoptimize the a b c. Even changing FOV 1 degree will give you
diffferent parameters.
> > A fisheye is very different in the outer area and cropping that
will change everything.
> >
> > Here is an image with a 2 image stitch using a 10,5mm on a 20D.
> > The full circle is here around 176 degree at the corners and 130
cropped to edge.
> > http://www.panoramas.dk/technics/10.5mm-circular-crop.jpg
> >
> > After optimizing parameters on both you get very different a b but
the same for c which is
> > natural as it is the centre. The 2 stitches matches almost perfect.
> > If I use the parameters for the full 176 degree optimizing and try
to optimize it without
> > optimizing a b and c the errros are 30-40 pixels at a 3000 pixels
panorama.
> >
> > Also note that the area cropped off is moved so far out to the
sides that it will never be
> > used by the blender.
> >
> > And the parameters are of course both also different from what I
get using fullframe crop.
> >
> > Hans
> >
> If instead of using crop you use selection, then the original fov is
> used and none of the abc parameters need reoptimized.
>
> # S100,600,100,800 Selection(l,r,t,b), Only pixels inside the
rectangle will be used for conversion.
> # Original image size is used for all image
parameters
> # (e.g. field-of-view) refer to the original
image.
> # Selection can be outside image dimension.
> # C100,600,100,800 Crop(l,r,t,b), Only pixels inside the rectangle
will be used for conversion.
> # Cropped image size is used for all image
parameters
> # (e.g. field-of-view) refer to the cropped
part of the image.
>
>
>
> --
> Jim Watters
>
> Yahoo ID: j1vvy ymsgr:sendIM?j1vvy
> jwatters @ photocreations.ca
> http://photocreations.ca
>
>
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