|
|
|||||||||||||||||||||
|
Digital Imaging Explained
Digital Imaging is a process where an electronic photograph, scanned document, or image is converted into a series of electronic dots called pixels. Pixels is an acronym for "picture elements". After the image is converted, or digitized, it is stored on a memory storage device which may be a hard drive or some sort of electronic storage device such as a memory stick. The pixels are stored in a compressed format to save storage space. As each pixel is being created it is assigned a color value, called a tonal value, of black, white, shades of grey, or an actual color. These pixels must be processed by a piece of software in order for them to be called up and viewed as an actual image later. Traditional cameras capture images onto film while digital cameras use an electronic chip known as a Charged Coupling Device (CCD). The CCD is actually a grid of miniature light-sensitive diodes. These diodes convert photons (light) that strikes them into electrons (electrical impulses). The technical name for these diodes is 'photosite'. The brighter the light is that hits the photosite the stronger the electrical charge is that's produced. After converting the photons into electrons, a mini-computer, located inside of the camera, reads the stored electrical value in each photograph. Then a built-in analog-to-digital converter turns the stored electrical value into a digital value. These digital values are then stored on the cameras memory storage device. When these digital values are recalled by software, and displayed on a screen, they reproduce the image that was originally captured by the camera or digital input device. The digital image that is created by the CCD is huge. It's far too big to be easily stored in the relatively little amount of storage space that's available to a digital camera. Accordingly, the camera's computer compresses the image to make it smaller. There are two basic methods for achieving this compression. The first method takes advantage of repetitive patterns in the image. For example, if you are taking a picture of an airplane that is flying in the sky, a lot of the picture will be a chunk of blue sky. The camera recognizes that there are multiple parts of the image containing the same digital information, so it only records a small piece of the sky. Then it simply creates a map to tell it where the rest of the sky belongs. When the picture is ultimately displayed the sky appears exactly the same as it did in the original image when it was first captured. The only difference is that the overall storage requirements were reduced thanks to the camera's clever mapping techniques. The other method uses a procedure called irrelevancy. This methodology automatically removes digital information that is not visible to the human eye such an infra red light. Digital imaging is amazing yet we have only started witnessing the revolutionary changes that are yet to come. About The Author Warren Lynch has been shooting commercial photography since 1979. Clients include Several Regional and National accounts. Sign up for"The Digital Dose" and receive his tips every other week for FREE! http://www.photopheed.com.
MORE RESOURCES:
digital photo - Google News |
 |
|
|
How to Easily Select the Important Photography Category for Your Home Based Business You may have already started to make money from your photography, but if you are still a gifted amateur, then there are effective methods you can use to kick start your chances of making a profit. At the present time there has never been more opportunities for the photographer. Review of the Photek Product Shooting Tent Here's the challenge. You have to photograph small items for Ebay or for clients' brochures. Have You Read Your Digital Camera Manual? Have you read the manual that came with your digital camera? If not you are in good company, the majority of digital camera owners never get past the *Basic Operations* section.If you didn*t read the manual why not? Was it the obscure photographic terms? The numerous cross references ? The complicated diagrams? The myriad uses for each dial and button? The convoluted English? Maybe all of the above. Digital Camera Memory - An Introduction The digital camera is essentially a computer-based device, whose core is controlled by the computer. And as a result the photographs are stored in a location called memory. Digital Camera Reviews and Ratings De-Mystify the Choices Shopping for a new digital camera can be quite frustrating with the hundreds of choices available. Digital camera reviews clarify this confusion by comparing camera features and options, then rating how each camera compares with similar models. How a Digital Camera Works The digital camera is not something of a magic box that came out of the blue and made wonders! The digital camera is very much like the conventional analog camera, but the technology has been altered. It also contains most of the associated components that the conventional camera contains, like lens and a shutter for letting in light, however instead of reaching a photosensitive film, the light is made to fall upon array of image sensors or photosensitive cells. 10 Steps to Buying a Digital Camera You Must Know You are anxious to purchase your new digital camera! You want to get it in your hands quickly so you can begin to enjoy it. Are you going to go to the store right now and pick one out? Wrong! You must have some basic knowledge and know-how prior to entering into the world of salesmen and digital cameras! Here are the steps to buying the digital camera that is right for you. The Well-Dressed Photographer - Winter Some of the best images can be captured during the winter months, so don't let the cold stop you. For the best photography experience, wear clothing that will keep you comfortable and safe. Kodak CX7300 Digital Camera Quality digital cameras are becoming affordable for just about everyone these days. Kodak's entry into the low cost end of the market is their CX7300 3. How to Create a Great Video - a Simple Guide on How to Shoot Home Movies with a Camcorder So you have bought a camcorder and have shot some footage, but truthfully you don't much like the results. Maybe I can help. How to Take Great Photos of Your Child Children are naturally photogenic. Ive worked in studios and children are so easy to photograph. Entering the World of Digital Video Cameras Gone are the days when you would need to employ a professional to take a video for your business projects. Whether you need it to provide training to your employees or students, you can do it yourself with the help of a digital video camera. African Safari Photography Best Five Destinations Good wildlife safari photography is not only about composition and camera equipment because you first need to find your subjects before you can even lift your camera. This best five African wildlife destinations list helps you do that. Digicam File Formats Looking at the digital camera, a person can visualize it as a combination of a camera along with a miniature computer system that stores the images as files or sets of bits, rather than a chemically treated film. Thus it comes to be a fact that there are certain file formats in which these images of the photographs captured by the camera are stored. What Should You Look for in a New Camera? These parameters are discussed at 2 levels: -Based on degree of functional use of available features -Based on the type of photography you want to attempt -->Based on degree of functional use of available features A person who is happy with his or her camera model usually responds with the following words of praise. 'Incredible ease of use' 'User-friendly controls' 'Intelligently and thoughtfully designed' 'Excellent value for money' 'Light and compact' These are the kind of terms that you will come across from camera owners who are satisfied with their camera models. Digital Imaging Explained Digital Imaging is a process where an electronic photograph, scanned document, or image is converted into a series of electronic dots called pixels. Pixels is an acronym for "picture elements". Digital Camera Memory Cards A digital camera accessory you should purchase is a spare memory card. Most cameras are sold with a 'starter' memory card that is usually a low capacity card that's enough to take a few sample photos on, but not enough for day-to-day use. Pinhole Photography: Right Back to Basics Why Pinhole Photography?It's fun. It's creative. Let Those Digital Photos Out! (You Don't Have To Print Them Yourself) What have you done with the photos you've taken with your digital camera? Hands up if they are languishing on your hard drive waiting to be printed. If your hand is up you are not alone. Fuji Digital Cameras Fuji digital cameras entered the market in the late 90's. Started in Japan in 1934, Fuji has always tried to stay ahead of the pack.
|
||||||||||||||||
| site map |
Minoltaprinters.com © 2000 - Partners
merchant account | Landscaping Gardening | Santander Spain | wine racks |