setlocal enabledelayedexpansion
type nul >imglist.txt
set BEFORE_STRING=
set AFTER_STRING=/
set BEFORE_STRING2=F:/
set OUTPUT_FILE=imglist.txt
for /f %%a in ('dir /a-d /s /b *.jpg *.gif') do (
set line=%%a
set RES=!line:%BEFORE_STRING%=%AFTER_STRING%!
echo !RES:%BEFORE_STRING2%=!>>%OUTPUT_FILE%!
)
endlocal
