Command line to get image dimensions

[Swifty]

First post here. Hello!
Can I use Irfanview from a script to determine the dimensions of a given image (usually JPG)? I can't see a command-line switch that looks relevant.

I have two displays; primary landscape, secondary portrait. I'm thinking of writing a script to display images randomly, but I'd like the landscape images to go to the landscape display and the portrait images to go to the portrait display. I could do all of this with technology that I already had, except reliably determining the dimensions. If there is an algorithm for extracting it from a jpg, then I could use that. I had some code that I wrote years ago, based on having found the image dimensions inside an existing JPG file, and working out how to navigate to it, but it was unreliable (no surprises there).

[Foxy]

The following batch script:

@echo off
cls
setlocal

:: --- Configuration --->

:: Temp-/Infofile path/name
set info=%temp%\info.txt

:: IrfanView
set iview=C:\IrfanView\i_view32.exe

:: <--- Configuration ---

%iview% %1 /info=%info%

for /f "tokens=4,6" %%a in ('type %info% ^| find.exe /i "Image dimensions"') do (set /a width=%%a) & (set /a height=%%b)

echo File: %1
echo Width: %width% Pixel
echo Height: %height% Pixel
echo.

if exist %info% del %info%
endlocal

returns the dimensions (width and height) of a specified pic, if you run this script as follows:

Syntax:
picdim.cmd [[Drive:][Path]Filename]

Example:
picdim.cmd "C:\MyPictures\subfolder 01\abcd 0123.jpg"

[Swifty]

Brilliant! Thank you!