Put a copyright notice on JPEG pictures

copyright.sh

#!/bin/bash

COPYRIGHT="© Karsten Kroesch - www.kroesch.ch"

for file in *.jpeg
do
    # Get the height of the image
    height=$(identify -format "%h" "$file")
    
    # Calculate the pointsize as 5% of the image height
    pointsize=$(echo "scale=0; $height * 0.05 / 1" | bc)

    # If pointsize is zero, set a minimum pointsize (e.g., 10)
    if [ "$pointsize" -eq 0 ]; then
        pointsize=20
    fi  

    convert "$file"  \( -background none -font Arial -pointsize "$pointsize" \
      -fill white -stroke black -strokewidth 1 \ 
      -gravity southeast -annotate +10+10 "$COPYRIGHT" \) \
      "$file"
done