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 _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
