@echo off
setlocal enableextensions enabledelayedexpansion
set /a count = 0
For %%A in (*.png) DO (
  set /a count += 1
  echo Processing Image !count!
  REM See the height of the image
  magick identify -ping -format "%%h" %%A  > Temp_Image_Size.txt
  REM Store that in a variable
  set /P ImageH=<Temp_Image_Size.txt
  set /A NewH=!ImageH!/3
  set /A NewOffset=!ImageH!/50
  set /A NewStroke=!ImageH!/216
  magick convert %%A ^
    ^( -size "!NewH!x!NewH!" -background none -gravity southeast -geometry +!NewOffset!+0 -fill red -font arial-bold -strokewidth !NewStroke! -stroke black caption:"!count!" ^
    ^( +clone -background black -shadow 80x7+3+3  ^) +swap -background none -layers merge +repage ^) -composite ^
    "!count!_%%A"
)
del Temp_Image_Size.txt
endlocal
pause