[Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms"); 
$img = new-object System.Drawing.Bitmap "C:\aaa\20181222-zadani-1.png"
$r = ""
For ($i=0; $i -lt 60; $i++) {
    For ($j=0; $j -lt 8; $j++) {
        $b = 2 + [int]( $i * 8 ) + 7 - $j
        $x=$b % 50
        $y=[math]::floor($b / 50)
        $c = $img.GetPixel(15+(30*$x), 15+(75*$y))
        if($c.R -gt 100) { $r += "1" } else { $r += "0" }
    }
    $r+="    "
}
$r

[Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms"); 
$img = new-object System.Drawing.Bitmap "c:\aaa\20181222-zadani-2.png"
$r = ""
For ($i=0; $i -lt 60; $i++) {
    For ($j=0; $j -lt 8; $j++) {
        $b = 2 + [int]( $i * 8 ) + 7 - $j
        $x=$b % 30
        $y=[math]::floor($b / 30)
        $c = $img.GetPixel(25+(50*$x), 5+(15*$y))
        if($c.R -gt 100) { $r += "0" } else { $r += "1" }
     }
    $r+="    "
}
$r

[Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms"); 
$img = new-object System.Drawing.Bitmap "c:\aaa\20181222-zadani-3.png"
$r = ""
For ($i=0; $i -lt 300; $i++) {
    For ($j=0; $j -lt 8; $j++) {
        $b = 2 + [int]( $i * 8 ) + 7 - $j
        $x=$b % 50
        $y=[math]::floor($b / 50)
        $c = $img.GetPixel((1*$x), (1*$y))
        if($c.R -eq 255) { $r += "0" } else { $r += "1" }
    }
    $r+="    "
}
$r

$someString = "Against_stupidity_even_the_gods_themselves_contend_in_vain.Čerňoučký kůň vymýšlí ďábelské nápady.The_difference_between_science_and_the_fuzzy_subjects_is_that_science_requires_reasoning,_while_the_other_subjects_require_scholarship."
$md5 = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
$utf8 = new-object -TypeName System.Text.UTF8Encoding
$hash = [System.BitConverter]::ToString($md5.ComputeHash($utf8.GetBytes($someString)))
$hash