On Monday 07 May 2007 11:37, Guillaume Bonillo wrote:
> Hi,
>
> I am new to scheme scripting.
> What i want to do is open pictures from a directory and apply a very
> simple macro.
>
> I can do it manually with the following steps :
>     - open image "the_image.jpg".
>     - save as .... the_image_with_thumbnail.jpg
>     - choose options : q = 0.85 , progressive, and default other options.
>     - check the option : save thumbnail.
>     - Click OK.
>     - close image.

Using a bash script or DOS batch file with imagemagick is a better and easier 
solution.

Below is a bash script that I use to create thumbnails of photos from my 
digital camera.
You can pass the jpg quality parameter to convert - I used the default which 
is 75% I think. The options are in the docs.

-----------------------------

#!/bin/bash

echo "Converting ..."

if [ ! -d "resized-1024x768" ]
then
  mkdir resized-1024x768
fi

if [ ! -d "resized-256x192" ]
then
  mkdir resized-256x192
fi

# Loop through all jpg files in current folder
# ============================================
for i in *.jpg
do
  FileName_Stripped=`echo $i | cut -d. -f1`

  if [ ! -e "resized-1024x768/$FileName_Stripped-1024x768.jpg" ]
  then
    echo "Converting $i to $FileName_Stripped-1024x768.jpg"
    convert -resize 1024x768 
$i "resized-1024x768/$FileName_Stripped-1024x768.jpg"
  fi

  if [ ! -e "resized-256x192/$FileName_Stripped-256x192.jpg" ]
  then
    echo "Converting $i to $FileName_Stripped-256x192.jpg"
    convert -resize 256x192 
$i "resized-256x192/$FileName_Stripped-256x192.jpg"
  fi
done

echo "Done"

-----------------------------

Regards
Paul
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