Rename pictures to date taken using Powershell

Rename-PictureToDateTaken.ps1

function Rename-PictureToDateTaken {
    param(
        [string]$Path
    )

    $assemblyLoaded = [appdomain]::currentdomain.getassemblies() | 
        where { $_ -match 'System.Drawing' }

    if( -not $assemblyLoaded ) {

        Add-Type -AssemblyName System.Drawing
    }

    $files = Get-ChildItem -Path $Path

    foreach( $file in $files ) {

        $fs = New-Object System.IO.FileStream $file.FullName, 'Open', 'Read'

        $image = [Drawing.Image]::FromStream($fs, $false, $false)

        $imageProperty = $image.GetPropertyItem(36867)

        $fs.Close()

        $dateTaken = [Text.Encoding]::UTF8.GetString($imageProperty.Value) #-replace ":", "-" -replace " ", "_"

        $dateTaken = $dateTaken.Substring(0, ($dateTaken.Length - 1)) -replace ":", "-" -replace " ", "_"
             
        $newName = $dateTaken + $file.Extension

        #Start-Sleep -Milliseconds 100

        Rename-Item -Path $file.FullName -NewName $newName
    }
}