Folgendes Skript ist NICHT von mir. Die Credits gehen an Michal Gajda von commandlinegeeks.com!
Ich benutze es jedoch sehr gerne, vor allem wen es darum geht die AD-User-Bilder nach erfolgreichem Export weiter zu verarbeiten.
Function Set-ImageSize
{
<#
.SYNOPSIS
Resize image file.
.DESCRIPTION
The Set-ImageSize cmdlet to set new size of image file.
.PARAMETER Image
Specifies an image file.
.PARAMETER Destination
Specifies a destination of resized file. Default is current location (Get-Location).
.PARAMETER WidthPx
Specifies a width of image in px.
.PARAMETER HeightPx
Specifies a height of image in px.
.PARAMETER DPIWidth
Specifies a vertical resolution.
.PARAMETER DPIHeight
Specifies a horizontal resolution.
.PARAMETER Overwrite
Specifies a destination exist then overwrite it without prompt.
.PARAMETER FixedSize
Set fixed size and do not try to scale the aspect ratio.
.PARAMETER RemoveSource
Remove source file after conversion.
.EXAMPLE
PS C:\> Get-ChildItem 'P:\test\*.jpg' | Set-ImageSize -Destination "p:\test2" -WidthPx 300 -HeightPx 375 -Verbose
VERBOSE: Image 'P:\test\00001.jpg' was resize from 236x295 to 300x375 and save in 'p:\test2\00001.jpg'
VERBOSE: Image 'P:\test\00002.jpg' was resize from 236x295 to 300x375 and save in 'p:\test2\00002.jpg'
VERBOSE: Image 'P:\test\00003.jpg' was resize from 236x295 to 300x375 and save in 'p:\test2\00003.jpg'
.NOTES
Author: Michal Gajda
Blog : http://commandlinegeeks.com/
#>
[CmdletBinding(
SupportsShouldProcess=$True,
ConfirmImpact="Low"
)]
Param
(
[parameter(Mandatory=$true,
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true)]
[Alias("Image")]
[String[]]$FullName,
[String]$Destination = $(Get-Location),
[Switch]$Overwrite,
[Int]$WidthPx,
[Int]$HeightPx,
[Int]$DPIWidth,
[Int]$DPIHeight,
[Switch]$FixedSize,
[Switch]$RemoveSource
)
Begin
{
[void][reflection.assembly]::LoadWithPartialName("System.Windows.Forms")
#[void][reflection.assembly]::loadfile( "C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Drawing.dll")
}
Process
{
Foreach($ImageFile in $FullName)
{
If(Test-Path $ImageFile)
{
$OldImage = new-object System.Drawing.Bitmap $ImageFile
$OldWidth = $OldImage.Width
$OldHeight = $OldImage.Height
if($WidthPx -eq $Null)
{
$WidthPx = $OldWidth
}
if($HeightPx -eq $Null)
{
$HeightPx = $OldHeight
}
if($FixedSize)
{
$NewWidth = $WidthPx
$NewHeight = $HeightPx
}
else
{
if($OldWidth -lt $OldHeight)
{
$NewWidth = $WidthPx
[int]$NewHeight = [Math]::Round(($NewWidth*$OldHeight)/$OldWidth)
if($NewHeight -gt $HeightPx)
{
$NewHeight = $HeightPx
[int]$NewWidth = [Math]::Round(($NewHeight*$OldWidth)/$OldHeight)
}
}
else
{
$NewHeight = $HeightPx
[int]$NewWidth = [Math]::Round(($NewHeight*$OldWidth)/$OldHeight)
if($NewWidth -gt $WidthPx)
{
$NewWidth = $WidthPx
[int]$NewHeight = [Math]::Round(($NewWidth*$OldHeight)/$OldWidth)
}
}
}
$ImageProperty = Get-ItemProperty $ImageFile
$SaveLocation = Join-Path -Path $Destination -ChildPath ($ImageProperty.Name)
If(!$Overwrite)
{
If(Test-Path $SaveLocation)
{
$Title = "A file already exists: $SaveLocation"
$ChoiceOverwrite = New-Object System.Management.Automation.Host.ChoiceDescription "&Overwrite"
$ChoiceCancel = New-Object System.Management.Automation.Host.ChoiceDescription "&Cancel"
$Options = [System.Management.Automation.Host.ChoiceDescription[]]($ChoiceCancel, $ChoiceOverwrite)
If(($host.ui.PromptForChoice($Title, $null, $Options, 1)) -eq 0)
{
Write-Verbose "Image '$ImageFile' exist in destination location - skiped"
Continue
} #End If ($host.ui.PromptForChoice($Title, $null, $Options, 1)) -eq 0
} #End If Test-Path $SaveLocation
} #End If !$Overwrite
$NewImage = new-object System.Drawing.Bitmap $NewWidth,$NewHeight
$Graphics = [System.Drawing.Graphics]::FromImage($NewImage)
$Graphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
$Graphics.DrawImage($OldImage, 0, 0, $NewWidth, $NewHeight)
$ImageFormat = $OldImage.RawFormat
$OldImage.Dispose()
if($DPIWidth -and $DPIHeight)
{
$NewImage.SetResolution($DPIWidth,$DPIHeight)
} #End If $DPIWidth -and $DPIHeight
$NewImage.Save($SaveLocation,$ImageFormat)
$NewImage.Dispose()
Write-Verbose "Image '$ImageFile' was resize from $($OldWidth)x$($OldHeight) to $($NewWidth)x$($NewHeight) and save in '$SaveLocation'"
If($RemoveSource)
{
Remove-Item $Image -Force
Write-Verbose "Image source '$ImageFile' was removed"
} #End If $RemoveSource
}
}
} #End Process
End{}
}