CHAPTER 1 INTRODUCTION An image is an artifact that records visual perception, for instance a two-dimensional image, which has a similar look to some subject—usually a physical object or a person. Images may be two-dimensional, like screen show, photographs or it can also be three dimensional, such as hologram or sculpture. Images will be captured by optical devices like cameras. A digital image is essentially a collection of pixel values arranged in rows and columns. Each pixel consists of 8 bits
retrieve related information. Oracle database is also the key to solving the information management. Therefore there were few important feature in oracle database to maintain the function of the database. First, the general feature are backup, compression of data, export and import of data, data parallel processing, transaction and Unicode. Other than this, there were more key features in oracle database for SPA customer which is well- known for its Enterprise Resource Planning (ERP) and data management
human being. The simple and best example of the signal is the traffic signal which gives the information to the drivers about the right way to conflicting movement of traffic at an intersection of road. The various real time signals are speech, text, image and video. For example, if anybody can share some information, then the information is not same during the entire communication period rather it varies with time. Another example is that if communication are happened in any lecture room without any
words Cryptos meaning cover and grafia meaning writing [1] defining it as covered writing. In image cryptography the information is hidden exclusively in images. Cryptography is the art and science of secret communication .It is the practice of encoding/embedding secret information in a manner such that the existence of the information is invisible. The original files can be referred to as cover text, cover image, or cover audio. After inserting the secret message it is referred to as Crypto-medium. A
formats M2 Animated Gifs are images in the gif file format that are able to move and change. An animated gif contains a number of images or frames, these frames are shown in a specific order in order to show animation. An animated gif can loop constantly or end after a few sequences. Animated gifs do not take up a lot of space on websites as the file size is small. Animated gifs have 256 colours available so they are best used for simple text and shapes. Advantages of animated gifs Animated Gifs
Firstly I will explain what is signal ,signal processing ,analogue viruses digital signal types of signal processing their advantages and disadvantages and their comparison .I-e which one is better …….why analog signal processing (ASP) is replaced with digital signal processing (DSP). What is Signal??? Any physical quantity that varies with time or any other independent variable is called signal. What is signal processing??? Signal processing is concerned with the improvement of quality of a signal
A COMPARATIVE REVIEW OF HIDING DATA IN DIGITAL IMAGES USING VARIOUS STEGANOGRAPHY TECHNIQUES Nimratpal Kaur Dr. Sandeep Sharma Department of computer engineering and technology Department of computer engineering and technology Guru Nanak Dev University Guru Nanak Dev University Amritsar, India Amritsar, India nimrat264@gmail.com Abstract- Data security is one of the most significant aspects to be deliberated when some
reconstruction and reformatting of pictures, easier image process, a large vary with acquisition, speedy storage and retrieval, higher distribution and a lot of controlled viewing and analysis. Digital radiography presents the potential of improved image quality still as. Providing opportunities for advances in medical image management, computer-aided diagnosis, teleradiology and additionally provides a speedy and improved flow of diagnostic info. The electronic image will probably be viewed on a screen like
FEATURE EXTRACTION APPROACHES: Principal Component Analysis: PCA is a useful statistical technique that has found application in fields such as face recognition and image compression, and is a common technique for finding patterns in data of high dimension. Technically, a principal component can be defined as a linear combination of optimally-weighted observed variables. In order to understand the meaning of this definition
Sound Wave Sound waves are a series of longitudinal and compression waves that moves through air or other material and don’t travel through vacuums or space. Sound waves were created by vibration of objects. The speed of waves is faster 4 times in liquids than in solids and it is faster in higher temperatures than in lower temperatures. Sound waves have 3 types which are infrasonic, audible and ultrasonic and are used for many applications for example medicine. To begin with, sound