Just say you wanted a csv file with dimension details of your image library - doing this with powershell

Get-ChildItem -Recurse C:\yourphotosdir -Filter *.jpg | % {
    $image = [System.Drawing.Image]::FromFile($_.FullName)
    if ($image.width -t 500 -and $image.height -gt 500) {
        New-Object PSObject -Property @{
        height_pixels = $image.Height
        width_pixels = $image.Width
        megapixels = ($image.Height * $image.Width)/1000/1000
        megabytes = (($_.Length)/1024)/1024
        name = $_.Name
        fullname = $_.Fullname
        date = $_.LastWriteTime
        }
    }
} | Export-Csv 'C:\yourphotosdir\img.csv' -NoTypeInformation