Recursively apply a watermark overlay script to all pictures in a folder?

Question

bash

There is such a script, it's normal and puts a watermark on the image, I need to go recursively inside the folder through the folders, even I'm stupid, help, alarm.

for image in *png *jpg *gif
do
 if [ -s $image ] ; then   # ненулевой размер файла
    width=$(identify -format %w $image)
    convert -background '#0008' -fill white -gravity center \
       -size ${width}x30 caption:AskDaveTaylor.com \
       $image +swap -gravity south -composite new-$image
     mv $image $savedir
     mv new-$image $image
    echo "На изображение $image успешно нанесен водяной знак"
  fi
done

Answer 1

In short, he himself answered his own question
vodyanoy - this is what to write
/ tmp - the way

for i in `ls /tmp -ld $(find . -regex ".*\(jpg\|jpeg\|JPG\|JPEG\|png\|PNG\)")`
do
echo $i
      if [ -s $i ] ; then   # ненулевой размер файла
          width=$(identify -format %w $i)
          convert -background '#0008' -fill white -gravity center \
             -size ${width}x30 caption:vodyanoy \
             $i +swap -gravity south -composite new-$image
           mv new-$image $i
          echo "На изображение $i успешно нанесен водяной знак"
        fi
     
      done

Answer 2

find /tmp -type f -regex ".*\(jpg\|jpeg\|JPG\|JPEG\)" -exec jpegoptim --preserve --preserve-perms --max=85 {} \;

like this, by analogy, do
where /tmp
findto search recursively from the current directory
-type f- display only files
-regex ".*\(jpg\|jpeg\|JPG\|JPEG\)"- well, the regular expression here is shorter
-exec to execute with the found one -
jpegoptim --preserve --preserve-perms --max=85 my command
{}is the place where you substitute the found file,
\;end