Fetch images from various Web URLs and resize and save

Fetch-Resize-Image.ps1

[CmdletBinding()]
param (
    [ValidateNotNullOrEmpty()]
    [string] $ConfigPath = ".\RefreshWebCache.json"
)
    
begin{
    Write-Host "$([datetime]::now.tostring()) Starting $(split-path -Leaf $MyInvocation.MyCommand.Definition ) process"
    
    Add-Type -AssemblyName System.Drawing
    
    $startTime = [System.DateTime]::Now

    $pwd = split-path -parent $MyInvocation.MyCommand.Definition

    if (!(Test-Path $ConfigPath)) { 
		throw "Error: The Configuration was not found at $ConfigPath!!"
		Exit 
	}
    
    $config =  Get-Content -Raw -Path $ConfigPath | ConvertFrom-Json
}
process{
    foreach($img in $config.Images){
        $temp = [System.IO.Path]::GetTempFileName()        
        Invoke-WebRequest -Method Get -Uri $img.Url -OutFile $temp

        try{
            [System.Drawing.Image] $fullSizeImg = [System.Drawing.Image]::FromFile($temp)

            $newImage = New-Object System.Drawing.Bitmap([int]$img.Width, [int]$img.Height)
            $gr = [System.Drawing.Graphics]::FromImage($newImage)


            $gr.SmoothingMode = [System.Drawing.Drawing2D.SmoothingMode]::HighQuality
            $gr.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
            $gr.PixelOffsetMode = [System.Drawing.Drawing2D.PixelOffsetMode]::HighQuality
            $gr.DrawImage($fullSizeImg, -[int]$img.Left, -[int]$img.Top, [int]$img.Width+[int]$img.Left, [int]$img.Height+[int]$img.Top)

            #$resized = $fullSizeImg.GetThumbnailImage($img.Width,$img.Height,$null,[System.IntPtr]::Zero)            
            $img.Path = join-path (resolve-path (split-path $img.Path -parent)) (split-path $img.path -leaf)
            $newImage.Save($img.Path)
        }
        catch{Write-Host $_.Exception.Message}
        finally{
            $fullSizeImg.Dispose()
            #$resized.Dispose()
            $gr.Dispose()
            $newImage.Dispose()
            Remove-Item $temp -Force
        }
    }
}
end{
    Write-Host "$([datetime]::now.tostring()) Done"
}

RefreshWebCache.json

{ "Images": 
    [
		{
			"Path" : ".\\adystech.png",
			"Url" : "https://avatars1.githubusercontent.com/u/11991955",
			"Top" : "100",
			"Left" : "0",
			"Width" : "469",
			"Height" : "402"
		}
	]
}