Hi Fred,
I actually just came up with quicker own solution, heh. Here it is in
PHP-ish scripting:
if (($x / $y) < 1.38461538) {
$c_rate = ($val[1] - ($x * 130 / 180));
$newheight = $val[1] - $c_rate;
shell_exec("convert {$img}.jpg -crop {$x}x{$newheight}+0+" .
($c_rate/2) . " {$img}!");
} else {
$c_rate = ($val[0] - ($val[1] * 180 / 130));
$newwidth = $val[0] -
$c_rate;
shell_exec("convert {$img}.jpg -crop {$newwidth}x{$val[1]}+" .
($c_rate/2) . "+0 {$img}!");
}
That should crop it in the middle and account for the aspect ratio that I
specified. :-) If you see any trouble with this let me know!
Dave
On Feb 17, 2008 11:05 AM, David Di Biase <[EMAIL PROTECTED]> wrote:
> Hi Fred,
>
> That didn't seem to do much either, for portraits it just seems to be
> cropping them normally as a straight forward portrait not to my 180x130
> required size. :-/
>
> Hmmmmm.
>
> Dave
>
>
> On Feb 17, 2008 2:57 AM, Fred Weinhaus <[EMAIL PROTECTED]> wrote:
>
> > Dave,
> >
> > Sorry, I got started with an idea and then found a counter situation.
> > Using 180x130^ is not quite right.
> >
> > The problem is that if you do what I said below and your image is
> > square (say 200x200), then what you get is an image that is 130x130
> > (I think - I have not tried it). If so, then you have no image to
> > make the width 180 and would have to pad it with some background.
> >
> > So say, if your image is 270 (or bigger) x 200, then you would get an
> > image that was 180 (or bigger) x 130, if you scaled to 130. Then you
> > would have enough room to get the center 180x130.
> >
> > But if it is less than 270 in width, then you have too little width
> > after resizing to 130 to get 180x130 without padding.
> >
> > To put it another way, if the aspect ratio w/h is greater than
> > 180/130=1.385, this works. But if it is less, then it does not work.
> >
> > When the size is less than 270 x 200, or more properly the aspect
> > ratio, w/h is less than 1.385, then you want to scale to the larger
> > dimension, which is 180. Then you get something that is 180 x 130 (or
> > bigger). So for example if you have your 200x200 and resize to 180
> > for the width, then you get a height and width of 180 and can then
> > get a 180x130 center area from it.
> >
> > So the key is to check the aspect ratio. If w/h > 180/130, then
> > resize to the minimum dimension (130) and crop out the center
> > 180x130; otherwise resize to the maximum dimension (180) and crop out
> > the center 180x130.
> >
> > I think this means:
> >
> > if aspect=w/h > 180/130, then
> >
> > convert 1.jpg -filter Lanczos -resize 130x130 -gravity center 1_.jpg
> >
> > else
> >
> > convert 1.jpg -filter Lanczos -resize 180x180 -gravity center 1_.jpg
> >
> > (similarly if you use -thumbnail in stead of -resize)
> >
> > Again, I have not tested this. Perhaps tomorrow I can check it out.
> >
> >
> > Fred
> >
> >
> >
> >
> > >Hehe, that was a little confusing, sorry. So you're saying do
> > >something like this:
> > >
> > >convert 1.jpg -filter Lanczos -resize 180x130^ -gravity center
> > >1_.jpg but it wont work for square images.
> > >
> > >Dave
> > >
> >
>
>
>
> --
> David Di Biase
--
David Di Biase
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