Photography Information

 

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.

contact@photopheed.com


MORE RESOURCES:

Women in Protest Photography, Allegories For Our Discontent
Jezebel
Lozina added that the police handled her gently, which may be true, but Shipenkov's photograph—an object that exists independently of Lozina's narrative—resists such interpretation. In the jumble of bodies, the photograph makes a visual appeal to ...



The Atlantic

Winners of the 2017 Sony World Photography Awards
The Atlantic
The Sony World Photography Awards, an annual competition hosted by the World Photography Organisation, has announced the winners of its Open categories and National categories for 2017. This year's contest attracted 227,596 entries from 183 countries ...
From over 105000 images, 10 stand alone in Sony World Photography Awards Open competitionimaging resource
World's best single photographs revealed by 2017 Sony World ...Creative Boom (blog)
You have to see the stunning images of the Sony World Photography Awards 2017Metro
The Sun -Evening Standard -Australian Photography + digital -World Photography Organisation
all 30 news articles »


Texas A&M The Battalion

Aggies 'develop' photography skills
Texas A&M The Battalion
Photography Club is supposed to be a place where everyone who is a photographer can come share ideas, share styles, share camera types, learn about different equipment and it's just a big collaborative group,” Starnes said. “A lot of the time ...



The Hub at Johns Hopkins

Area high schoolers get gallery treatment at Montgomery County Campus photography show
The Hub at Johns Hopkins
Chase Osborne doesn't have any fancy photography equipment like some of his AP Photography classmates have. His sole camera is the one on his iPhone 6s Plus. But that phone camera, coupled with his talent for photography, landed him top honors in ...



Hibbing Daily Tribune

Storytelling through photography
Hibbing Daily Tribune
Inspired by images in the National Geographic magazine as a child, Jill Aubin has been practicing the art of photography for almost 40 years. Nearly always equipped with her camera, she often walks in the woods, throughout town and in alleys. “I try to ...



Forbes

Moving Portraits Of Los Angeles Housing Project Shortlisted For Major Photography Prize
Forbes
The Photographers' Gallery in London has been showcasing photography for over 40 years and was the first public gallery in the UK to exhibit international superstars like Juergen Teller, Robert Capa, Sebastiao Salgado and Andreas Gursky. The Gallery ...



Citizens Voice

New rules will ban courtroom recording, photography
Citizens Voice
WILKES-BARRE — New court rules taking effect next month will explicitly ban all courtroom recording and photography, as well as require all visitors to turn off their electronic devices unless approved by a presiding judge. Under rules in an order ...



Petoskey News-Review

Juried photography exhibit now on display at Gaylord arts center ...
Petoskey News-Review
The annual "Juried Photography Exhibit" is now on display through April 29 at the Gaylord Area Council for the Arts (GACA) Art Center, 125 E. Main St.

and more »


Haute Living

Don't Miss this Week's Blockbuster Photography Show
Haute Living
Why it's a must: The Photography Show presented by AIPAD (Association of International Photography Art Dealers) is the longest-running fair of its kind. More than 110 top galleries will be offering images from early and contemporary masters, as well as ...



Blooming photography
Ormond Beach Observer
The March field trip of the Casements Camera Club took 16 photographers to Paula and George Hausermann's EFG Orchid Nursery in DeLand. The assignment was to make the best possible image of an orchid. The top 6 images were from: Jaci Hanson, ...


Google News

home | site map
© 2006 KeralaClick.com