Finding the histogram of an image

Okay, on the last post I've said what is an histogram. Now let's do a simple example on MATLAB to understand the concept. We will be using some well known Images for our exercises. "Lena", "Barbara", "Baboon" are some.

For finding the histogram I'm providing two programs.

One returns the histogram as output.
histogram.m
One returns three graphs of three different images to look the difference.
histrogram3.m

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Scan Conversion(Circle) - Midpoint Algorithm

Assignment 05. Use the mid-point circle technique to derive the necessary equations to scan convert the following circular sector (i.e., points from 27 0 o to 315 o ) . Implement your method and u se the circle's symmetric property to draw complete circles. The file is available here ( ScanConvertCirclemidpoint.cpp ) Play with it. You will understand..

TrashCoders

As I'm forming a Club "TrashCoders" after our Summer Holidays (May 2nd week), and going to share the knowledge I have, I created a new blog to upload all of the works we do in the Club. Hope you guys have some ideas and/or tips. Trash Coders Happy Holidays..

Raising cryptography’s standards

Calculating encryption schemes’ theoretical security guarantees eases comparison, improvement. Most modern cryptographic schemes rely on computational complexity for their security. In principle, they can be cracked, but that would take a prohibitively long time, even with enormous computational resources. There is, however, another notion of security — information-theoretic security — which means that even an adversary with unbounded computational power could extract no useful information from an encrypted message. Cryptographic schemes that promise information-theoretical security have been devised, but they’re far too complicated to be practical. In a series of papers presented at the Allerton Conference on Communication, Control, and Computing, researchers at MIT and Maynooth University in Ireland have shown that existing, practical cryptographic schemes come with their own information-theoretic guarantees: Some of the data they encode can’t be extracted, even by a ...

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