Generate Background resolutions for windows lock screen

GenerateResolutions.ps1

[reflection.assembly]::LoadWithPartialName("System.Drawing") | Out-Null

#1920x1200 is the starting image, doesn't have to be this resolution
$baseImage = New-Object system.drawing.bitmap $pwd\1920x1200.jpg

$files = @"
Background1024x1280.jpg
Background1024x1280.jpg
Background1024x768.jpg
Background1280x1024.jpg
Background1280x768.jpg
Background1280x960.jpg
Background1360x768.jpg
Background1440x900.jpg
Background1600x1200.jpg
Background1920x1200.jpg
Background768x1280.jpg
Background768x1360.jpg
Background900x1440.jpg
Background960x1280.jpg
"@

$files -split "`n" |% {
  $res = $_ -replace "Background", "" -replace ".jpg", ""
  $resolution = $res -split "x"
  $w = [int]$resolution[0]
  $h = [int]$resolution[1]
  $w
  $h
  $newimage = New-Object System.Drawing.Bitmap $w, $h
  $g = [System.Drawing.Graphics]::FromImage($newimage)
  $g.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
  $g.DrawImage($baseImage, 0, 0, $w, $h)
  "$pwd\$_"
  $newimage.Save("$pwd\$_".trim(), ([System.Drawing.Imaging.ImageFormat]::Jpeg))
  $newimage.Dispose()  
}