lotsa dots

[aurora]

i've solved it with javascript, too:

Code: Select all

var s = document.getElementsByTagName('img')[1];
var w = s.width, h = s.height;

var canvas = document.createElement("canvas");
canvas.width = w;
canvas.height = h;

var ctx = canvas.getContext("2d");
ctx.drawImage(s, 0, 0);

var cw = w / 16;
var ch = h / 16;
var x, y;
var txt = '';

for (y = 0; y < ch; ++y) {
    var b = '';

    for (x = 0; x < cw; ++x) {
        data = ctx.getImageData(8 + (x * 16), 8 + (y * 16), 1, 1).data;

        if (data[0] == 230) {
            b += 1;
        } else {
            b += 0;
        }
    }

    txt += String.fromCharCode(parseInt(b, 2).toString(10));
}

console.log(txt);

[rogger]

this one took me a long time, because i thought of these old Punched Tape coded in baudot. It took a while until I figured out that it is just 8-Bit-ASCII....

coding was done in Python

[Matt12346123]

Hello, I thought I'll post a VB solution (feel free to laugh)

Code: Select all

    For y = 120 To Picture1.Height Step (16 * 15)
        b = 0
        p = 7
        For x = 120 To Picture1.Width - 120 Step (16 * 15)
            If (Picture1.Point(x, y) And &HFF) = 230 Then b = b Or (2 ^ p)
            p = p - 1
        Next x
        sstr = sstr & Chr(b)
    Next y
    Clipboard.Clear
    Clipboard.SetText sstr

You paste the picture into the box, and the answer goes in clipboard. For non-VB users, each pixel = 15 'twips'.

[macdachs]

Used AutoIt as well:

$x = 32
$y = 340
$farbe = 0

$text = ""
While $farbe <> 1579032
$wert = 0

for $zahl = 0 to 7
$farbe = PixelGetColor($x + ($zahl * 16),$y)
if $farbe = 15132390 Then
$wert = $wert + 2^(7-$zahl)
EndIf
Next
ConsoleWrite(chr($wert))
$y = $y +16

WEnd
ConsoleWrite(@CRLF)

[Tabun]

I just solved it with a little PHP script:

Code: Select all

<?php
	$im = imagecreatefrompng('http://www.hacker.org/challenge/misc/stars.php');
?>

That's what I tried at first, but how did you manage to keep your hacker.org session going for that? I had to get the file's contents through fopen, just so I could send my Cookie: header along. :]

[CodeX]

See the bottom of this for automated submitting

[Hippo]

For the hard work I have used irfan, rest was easy python.

Code: Select all

i_view32 stars.png /gray /bpp=1 /resize_short=8 /aspectratio /resample /convert=stars.bmp 
i_view32 stars.bmp /gray /invert /bpp=1 /convert=stars2.bmp 

[Malfi]

I saved the picture from the browser and used Perl and GD to do the real work.

Code: Select all

use GD::Image;

$filename="~/Downloads/images/stars.php.png";
my $image = GD::Image->newFromPng($filename);
my ($height, $width) = $image->getBounds;

for ($x=8;$x<=$width;$x=$x+16) {
    $summe=0;
    $z=7;
    for ($y=8;$y<=$height;$y=$y+16) {
        my ($index) = $image->getPixel($y,$x);
        my ($r,$g,$b) = $image->rgb($index);
        if ($r == 228) {
            $summe=$summe+2**$z;
        }
        $z--;
    }
    push @result,$summe;
}

print pack("C*", @result);
print "\n";

[browni3141]

Am I the only one that learned to quickly read and translate the images? I'm too lazy to write code when it's not needed, and it probably took less overall time than writing out a script

[Hippo]

Am I the only one that learned to quickly read and translate the images? I'm too lazy to write code when it's not needed, and it probably took less overall time than writing out a script

Wow, you have returned to the site ... 5 challenges solved recently ...

[AMindForeverVoyaging]

Am I the only one that learned to quickly read and translate the images?

Yes

[Napoleon]

I did it in Javascript, no problems, fun challenge

Code: Select all

var answer = "";
    var img = document.getElementsByTagName('img')[1];
    var canvas = document.createElement('canvas');
    canvas.width = img.width;
    canvas.height = img.height;
    canvas.getContext('2d').drawImage(img, 0, 0, img.width, img.height);;
    for(var i=0;i<(img.height/16);i++){
        curInt = ((16*i)+8)
        bit="";
        for(var x=0;x<8;x++){
            xInt = 8+(16*x)
            colour = canvas.getContext('2d').getImageData(xInt,curInt, 1, 1).data
            bit += (colour[0] == 223?0:1);
        }
        answer +=(String.fromCharCode(parseInt(bit,2).toString(10)))
    }