Get-LockScreenImages.ps1

$imagePath = "$home\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets\*"
$destinationPath = "$home\OneDrive\Pictures\Lock screen"

Add-Type -AssemblyName System.Drawing

# get images from lock screen folder
$items = Get-ChildItem -Path $imagePath

foreach($item in $items) {
    $fileName = $item.Name
    
    # skip small images/icons
    if($item.Length -lt 100000) {
        Write-Host " Skipped " -b Red -f Black -NoNewline
        Write-Host -f White " $($fileName).jpg"
        continue
    }
    
    # get image dimensions
    $image = New-Object System.Drawing.Bitmap $item.FullName
    $imageWidth = $image.Width
    $imageHeight = $image.Height
    $image.Dispose() # prevent file lock
    
    # separate images into Landscape/Portrait destination sub-folders
    # note: the script assumes these folders already exist
    if($imageWidth -gt $imageHeight) {
        $newPath = "$destinationPath\Landscape\$($fileName).jpg"
    }
    else {
        $newPath = "$destinationPath\Portrait\$($fileName).jpg"
    }
    
    # only copy files that haven't
    # already been copied
    if(!(Test-Path $newPath)) {
        Copy-Item -Path $item.FullName -Destination $newPath
        Write-Host -b Green -f Black " Copied  " -NoNewline
    }
    else {
        Write-Host -b Yellow -f Black " Exists  " -NoNewline
    }
    
    Write-Host -f White " $($fileName).jpg"
}