By Urban Picasso -



<p>The following picture was given with a hidden message to extract:</p>
<center><img src = "http://i36.photobucket.com/albums/e42/Samksha/hiltonHiding2bitMessage_zpsze7d7x8e.png" /></center>
<p>After extraction, this is what the hidden message was!</p>
<center><img src = "http://i36.photobucket.com/albums/e42/Samksha/Part%203_zpsmdhehkly.png"/></center>

<h3> Algorithm</h3>
<p> The algorithm used for the extraction is similar to the one used for extraction in the first part.</p>

<h3> Code</h3>

<pre>
function pchange(pixval)
{
    var x = (pixval-Math.floor(pixval/4)*4)*64;
    return x;
}

function extract(image)
{
    for(var pixel of image.values())
    {
        pixel.setRed(pchange(pixel.getRed()));
        pixel.setGreen(pchange(pixel.getGreen()));
        pixel.setBlue(pchange(pixel.getBlue()));
    }
    return image;
}

var combinedimage = new SimpleImage("hiltonHiding2bitMessage.png");
hiddenimage = extract(combinedimage);

print(hiddenimage);
</pre>
  </html>

Comments

Post a Comment

Popular posts from this blog

Choose Your Social Media Channels Week 5 Quiz

By Urban Picasso -
 Choose Your Social Media Channels Week 5 Quiz You’re looking to reach the largest possible audience with the most precise targeted advertising tools. Your go-to social media platform should be: Facebook You’re looking to build a community online. Your go-to social media platform should be: Facebook Which of the following are good general guidelines for a corporate blog? Select all that apply : Blog posts must respect copyright, privacy, fair use, financial disclosure, and other applicable laws Blog posts should not disclose any information that is confidential or proprietary to the company Determine whether the following statement is true or false: Consumers today expect brands to be present on their favorite social media platforms. True Of the three core values that a social media policy should achieve, which category does the following statement fit in? “Nordstrom referred to company guidelines that can help employees to represent the company in a way that doesn’t harm the b...
Read more