 | | New Technology in Digital PhotographyEarlier to take photographs, photographic films were used, images created and photographic processing was done to make the photos visible for all to see as pictures. In digital photography, digital technology is used to make digital images of people or any pictures that fancy us. This is then stored digitally in computers. No chemical processing needs to be done. The pictures can be stored, retrieved whenever we want, transmitted to any one we want to send it to, printed and also displayed.
The pictures can be taken with the help of a digital camera. The digital film is made up of flash memory modules or recordable CD's. This can be transferred to the computer and stored there. In the computer, the photos can be made to look better with digital technology. The color of the picture, the background, the main image in the photo and the lighting can be made to look different and better. It can also be put on a website.
Digital technology gives the pictures a longer life as opposed to the camera print. We no longer need to have prints. We can see in on the computer whenever we want to. We can sent to near and dear ones far away.
Digital photography is a form of digital imaging. This can be done without a camera. It can be done with computer tomography scanners and radio telescopes without photographic equipments. Digital images can be made of conventional photographs, thus helping in restoring old photographs and helping in keeping memories alive.
Digital photography is the order of the day. Nowadays no one uses the conventional camera. Many new techniques have been made to improve the technology of digital photography. Every aspect of photography is advancing. New strides are being taken in all fields of lighting, optics, sensors, processing and display. There is also new software to integrate all this.
Normal images can be transformed into 3D images. This looks good when viewed from different angles. Making 3D images is very computer intensive. Models of famous places can be seen with the help of Microsoft Photosynth.
High Dynamic Range Cameras and displays are available. With a non-HDR camera a HDR a person can create his/her own HDR image combining multiple exposures. Dust Reduction Systems are also being put in digital SLR cameras to keep the dust of the image sensors of the camera.
A new technique is now used in museums. Using computer controlled lights and sensors; an object's specular reflection is captured. This helps in taking pictures of oil paintings. This is not available in the market. Another feature is the removal of motion blur with the help of a flutter shutter. This is also not available in the market. Other areas that have improved are computer software, displays, enlarged gamut sensors and computer controlled lighting.
Various new techniques are being worked on and thought of by the companies that produce digital cameras and those who are into digital photography. Every now and then we hear of newer advances which improve the quality of photographs and help to restore the old ones that we possess. |
|
|
|
|
| Information Security: Principles and Practice (Hardcover)
by Mark Stamp |  | As businesses and consumers become more dependent on complex multinational information systems, the need to understand and devise sound information security systems has never been greater. This title takes a practical approach to information security by focusing on real-world examples. While not sidestepping the theory, the emphasis is on developing the skills and knowledge that security and information technology students and professionals need to face their challenges.
Publisher: Wiley-Interscience (October 28, 2005)
Product Dimensions: 9.3 x 6.3 x 1 inches
Paperback: 416 pages | About the Book:
The book is organized around four major themes:- Cryptography: classic cryptosystems, symmetric key cryptography, public key cryptography, hash functions, random numbers, information hiding, and cryptanalysis
- Access control: authentication and authorization, password-based security, ACLs and capabilities, multilevel and multilateral security, covert channels and inference control, BLP and Biba's models, firewalls, and intrusion detection systems
- Protocols: simple authentication protocols, session keys, perfect forward secrecy, timestamps, SSL, IPSec, Kerberos, and GSM
- Software: flaws and malware, buffer overflows, viruses and worms, software reverse engineering, digital rights management, secure software development, and operating systems security
Additional features include numerous figures and tables to illustrate and clarify complex topics, as well as problems-ranging from basic to challenging-to help readers apply their newly developed skills. A solutions manual and a set of classroom-tested PowerPoint(r) slides will assist instructors in their course development. Students and professors in information technology, computer science, and engineering, and professionals working in the field will find this reference most useful to solve their information security issues.
An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department. | About the Author:
MARK STAMP, PHD, is Professor of Computer Science, San Jose State University, where he teaches undergraduate and graduate-level information security courses. In addition to his experience gained in private industry and academia, Dr. Stamp has seven years' experience working as a cryptanalyst at the U.S. National Security Agency. | Book Reviews:
"Information Security: Principles and Practice presents information security concepts and practices insightfully in an easily comprehensible style. Although primarily intended as a college course resource, this book will appeal also to many security professionals. Highly recommended." (CHOICE, April 2006)
"The book is well suited for beginners, and contains enough introductory material on a variety of topics." (Computing Reviews.com, January 9, 2006) |
|
|
|
Useful Gifts for the Elderly: Adaptive gadgets, tools, and more!The Grandkids get toys, but who is spoiling the Grandparents? Return the favor by lavishing them with useful gifts. We have some ideas that just might help you out.Docking System for Wheel Chairs
Directory of Elderly Care Centers
Our directory of Elderly Care Centers consists of links that were hand-picked to help improve and enrich the lives of seniors with opportunities to be independent, celebrate life and reach their fullest potential!
Elderly Care Centers
Mobility: Wheelchair Lifts
Accommodate your wheelchair with ramps, lifts, and more. Need to rent a wheelchair lift or accessible wheelchair van? No problem, we have the resource directory for you!
Docking Device for Wheelchairs
Traveling with a Senior Citizen: What You Should Know
View our traveling checklist for seniors before you make your next trip. Being prepared is key to ensuring relaxed travel and enjoyable companionship for everyone.
Docking Device for Wheelchair
|
|
