JOMO KENYATTA UNIVERSITY OF AGRICULTURE AND TECHNOLOGY INSTITUTE OF COMPUTER SCIENCE AND INFORMATION TECHNOLOGY BSc COMPUTER TECHNOLOGY Literature Review On DIGITAL IMAGE CRYPTOSYSTEM WITH ADAPTIVE STEGANOGRAPHY NAME REG NO : JOHN NJENGA : CS 282-0782/2009 SUPERVISORS: DR. OKEYO MR. J WAINAINA 1 DECLARATION I declare that all materials presented here are my own original work‚ or fully and specifically acknowledged wherever adapted from other sources. The work has not been submitted previously
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PCM CODING/COMPANDING Q1. a)i) The process of quantisation introduces an error or noise component into the quantised signal. Derive an equation for the mean-squared quantisation error in terms of the quantization interval ‘a’. ii) Hence show that the peak signal-to-quantisation noise ratio (SQNR) is SQNR = ( 6n + 4.8 ) dB Where 2 n is the number of quantisation levels. b)i) Linear quantisation is used prior to binary PCM encoding of an analogue baseband signal which has
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PDA Personal Digital Assistants are hand-held personal computers that provide a host of personal information systems. PDAs are small‚ but versatile computers‚ slightly bigger in size than Palmtops and even Notebook computers. PDAs have their origin in British-made roaming device‚ Psion‚ a successor to Filofax‚ introduced in the 80s‚ for collecting POS (Position of Sales) data. Psion had several versions that define the device: a palmtop minicomputer with a small LCD display‚ tiny keyboard and
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Arduino Controller Board which is AN OPEN-SOURCE ELECTRONICS PROTOTYPING PLATFORM. Output of LM35 is feed to Arduino Analog input pin 0. Further Data is Processed by the C Program. Output of Micro-controller is connected to the 16X2 LCD Picture of Digital Thermometer Below is the Simple Programme which is used here :- #include LiquidCrystal lcd(12‚ 11‚ 5‚ 4‚ 3‚ 2); const int inPin = 0; void setup() { lcd.begin(16‚ 2); } void loop() { int x = analogRead(inPin); lcd.setCursor(0‚ 1); float
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This essay is a self reflective assignment; the main objective of this assignment is to rethink the issues of computer technology. In the first part‚ the benefits of the computer technology on the society will be introduced. The second part will be a conflict of the first part supported by themes from the text (The End of The Work)‚ and the reading kit which contains different articles written by different authors. The conclusion will be based on my own opinion from what I wrote. Ever since the
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ANALOGUE & DIGITAL SIGNALS Name: - BHAVESH PATWAL Tutor : - JAY PATEL Date: - 20th November‚ 2012 I . Analogue Signals : - Analogue signal is a form of transmitting data such as voice‚ image or video using continuous signals. This is a relatively inexpensive way to transmit data. Analogue communications are usually sent via twisted cables or fibre optic cables and they are transmitted via a carrier signal which is set at a specific frequency. The primary disadvantage of
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HTML5 Digital Classroom Jeremy Osborn and the AGI Training Team Contents Starting Up Section One: Essentials of HT ML‚ HT ML5‚ and CSS Lesson 1: Defining HT ML5 Lesson 2: Fundamentals of HT ML‚ XHT ML‚ and CSS Lesson 3: Formatting T ext with CSS Lesson 4: Introduction to CSS Layout Lesson 5: Advanced CSS Layout Section T wo: HT ML5 with CSS3 and JavaScript Lesson 6: Using HT ML5 Markup Lesson 7: Creating HT ML5 Forms Lesson 8: Introduction to JavaScript and jQuery Lesson 9: Working with Video
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How do people fall in love‚ finish degrees and manage businesses‚ all because of the technology on the Internet? This is strongly answered by internet technology such as: the use of webcams and video conferencing that has affected interpersonal communication today. Over the past few years‚ video conferencing technology has been growing as a result of the desktop and internet technology. These personal cameras allow the user to share a moving image of themselves with others. These cameras are then
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The Digital Learning Imperative: How Technology and Teaching Meet Today’s Education Challenges June 2012 I n February 2010‚ the Alliance for Excellent Education (Alliance) released a brief entitled “The Online Learning Imperative: A Solution to Three Looming Crises in Education.” Since then‚ in part because of rapidly shifting educational conditions‚ the Alliance has increased its focus on digital learning and technology to help ensure that all students graduate from high school
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