Re: [gentoo-user] resizing multiple images with adding a frame as needed

[Mick]

On Wednesday 24 Jun 2015 01:02:35 wabenbau@×××××.com wrote:
> hw <hw@×××××××××××××××××××××.de> wrote:
> > Hi,
> >
> > suppose I have a number of images that need to be displayed side by
> > side in a nice layout.  The images are of different sizes and have
> > different aspect ratios.
> >
> > To fit the images into the layout, I can scale the images either by
> > height or width or by percantage, and they will look messy in the
> > layout because I need to keep their aspect ratio when scaling them.
> >
> > So what I need to do is put a frame around each image just as needed
> > when scaling it so that I will end up with all the images having the
> > same size while maintaining their aspect ratio.
> >
> > I guess 'convert' (from imagemagick) or 'ffmpeg' can do this, yet I
> > couldn't find out how.
> >
> >
> > (In this particular case, I would set a default size to scale all
> > images to rather than doing something more complicated like examine
> > all images in advance to compute a good size to use from the largest
> > or smallest one or from their average dimensions.)
> >
> >
> > Any ideas how to do this?
>
> Look here:
>
> http://stackoverflow.com/questions/1787356/use-imagemagick-to-place-an-imag
> e-inside-a-larger-canvas
>
> You must add a resize paremeter as this example is only for placing an
> image inside a larger canvas. :-)
>
> You can easily find more examples in the Internet.
>
> --
> Regards
> wabe

Give this a spin, or modify accordingly to suit your needs:

============================================
#!/bin/bash
for i in *.JPG; do
  name=${i%.JPG}
  convert -resize 900x675 ${i} ${name}_s.jpg
done
============================================

-- 
Regards,
Mick