Bash script to blur some pages of PDF files

blur-banner-to-pdf.sh

#!/bin/bash 

# Create an empty array to store the random numbers

#Percentage of pages blured 
porc=0.50

#npages=$(pdfinfo ${1} | grep Pages | awk '{print $2}')
#echo "total pages ${npages}"

pdfs=()
mapfile -d $'\0' pdfs < <(find . -name "*.pdf" -print0)

echo "${pdfs[@]}" 
for p in ${pdfs[@]}
do
    echo "Convert  ${p} to PNG" 
    pdftoppm  -png ${p} meta
    
    files=()
    mapfile -d $'\0' files < <(find . -name "meta*.png" -print0)
    
    npages=${#files[@]}
    
    ptotal=$(bc <<< "scale=10; ${npages} * ${porc}")
    #Get integer number of pages
    total=$( printf "%.0f" $ptotal )
    
    
    range="2-${npages}"
    
    numbers=()
    # Generate the desired number of unique random numbers
    while [ ${#numbers[@]} -lt ${total} ]; do
        # Generate a random number from 5 to 10
        random_number=$(shuf -i ${range} -n 1)
        # Check if the random number is already in the array
       if [ ! -v numbers[$random_number] ]; then
           # Add the random number to the array
           numbers[$random_number]=$random_number
       fi
    done
    
    
    for e in ${numbers[@]}
    do 
       pname="${files[$e]}"
       convert $pname  -blur 0x8  $pname
    done
    
    echo "Add banners  ${p}" 
    for e in ${files[@]}
    do
       convert $e  -annotate +50+50 'Copyright © 2023 Banner1' $e
       convert $e -gravity SouthEast -annotate +50+50 'Copy for Banner2' $e
    done
    #rm output.pdf
    rm ${p}
    list=${files[@]}
    echo "Create PDF  ${p}" 
    convert -density 150 ${list} ${p}
    rm meta*.png
done