Lou Franco's ECM Imaging Blog

Ok, you're going to want to install Powershell before reading the rest of this. Once, you've done that, try typing these commands at the prompt (type in what appears after the >, the text in italics is just commentary):

Here's the hello world program
> "hello world"
Remember, the result of your expression is just printed by the shell. "hello world" is a .NET System.String

Here's some other primitives and simple expressions:
> 3
> 3+4
> 1GB
> "hello " + "world"
> "hello world".substring(6)
> 1..10

Remember that Powershell's directory primitives operate on a provider interface.  You can call dir and cd on anything that implements it (like the registry)
> cd HKLM:\
> dir
> cd SOFTWARE\Microsoft\Windows
> dir
> c:
> dir

There is extensive built-in help:
> get-help get-process
> get-command *process*
> "hello" | get-member
> get-history
> get-command *history*

You can call .NET assemblies (variables start with $)
> $feed = [xml](new-object System.Net.WebClient).DownloadString(
"http://www.atalasoft.com/cs/blogs/loufranco/rss.aspx"
)
> $feed.rss.channel.item | select title
> $feed.rss.channel.item | ? { $_.title -match "ower" }

And you can call any third-party assemblies (like DotImage).  Once you have installed DotImage, copy Atalasoft.Shared.dll, Atalasoft.DotImage.dll and Atalasoft.DotImage.Lib.dll to C:\WINDOWS\system32\windowspowershell\v1.0 -- this is one of the places Powershell looks for assemblies. You load them like this:

> [System.Reflection.Assembly]::Load("atalasoft.dotimage")
> [System.Reflection.Assembly]::Load("atalasoft.dotimage.lib")
> [System.Reflection.Assembly]::Load("atalasoft.shared")
 

In all of the next examples, you'll want to give full paths to filenames -- Powershell has an odd notion of the current directory which is confusing to explain right now.

Here's how you load an image
> $img = new-object Atalasoft.Imaging.AtalaImage("fullpath to image")

And now run the oilpaint command
> $cmd = new-object Atalasoft.Imaging.ImageProcessing.Effects.OilPaintCommand
> $cmd.BrushWidth = 15
> $img2 = $cmd.Apply($img).Image

And save it (any undefined variable is null, so don't define $null)
> $img2.Save("full path to image", (new-object Atalasoft.Imaging.Codec.JpegEncoder(85)), $null)

That turns this

 

into this

Tomorrow I'll post the code that makes it easier to do this (using Cmdlets) 

Update: Here is Image Processing with Powershell, Part II