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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: Shanghai : Capital of Photography, 1910s-2020s The Eye of Photography Vicki Goldberg Dies at 88; Saw Photography Through a Literary Lens The New York Times Wellcome Photography Prize 2025 wellcome.org The Issues That Plague Photography Today The Phoblographer Nick Hedges obituary The Guardian David Vaughan Photography: Slowing Down the East End Hamptons.com Project Indigo: Adobe releases free advanced computational photography camera app for iPhone MacDailyNews BigPicture Photography Competition 2025 Winners Revealed DivePhotoGuide Adobe Indigo: Camera App Brings Computational Photography to iPhones With Full Manual Controls Tech Times Photographer Deena Sveinsson Honored With Award Estes Park News Celine and Centre Pompidou Invite Art Lovers to Experience the Photography of Wolfgang Tillmans prestigeonline.com Cooper Hewitt Presents “Made in America: The Industrial Photography of Christopher Payne” Van Nuys News Press Leadership Jonesboro looks to highlight NEA with new photography competition Jonesboro Right Now Canon Patents Affordable Lenses for Bird Photography The Phoblographer The Gifts Photography Has Given Me Fstoppers Fine Art Photographer Johan Siggesson Reveals Decade-Long Quest to Capture Singular Image - Newsfile The Week In Photos, June 20, 2025 CapeNews.net Randy Johnson's MLB mindset remains the same in photography Arizona Sports This Intimate, Enchanted-Garden-Themed Wedding Featured Both Fresh and Dried Flowers - Washingtonian A Tip For Bird Photography No One Shares The Phoblographer Brian Shuel obituary The Guardian If I had to start my camera setup from scratch, I’d pick these 5 cameras and drones: here’s why Tom's Guide Beuford Smith, Photographer Who Chronicled Black Life, Dies at 89 The New York Times HUAN_LANDERS : Annual Exhibition of the HUAN_LAND Photography Community The Eye of Photography Adobe Project Indigo Computational Photography App Released, Uses AI to Enhance Images - TechEBlog - ‘Youths everywhere were spitting over tinny beats playing off a Nokia’: great grime photographer Simon Wheatley The Guardian ‘At one point, I stepped on a cow’s head’: Gulshan Khan on her best photograph | Photography The Guardian Wolfgang Tillmans' photography in action Le Monde.fr The Voigtlander 28mm Lens is Perfect for Street Photography The Phoblographer Film meets digital: Frames App brings order to your analog photography workflow Digital Camera World Julian Lennon, Photography as Sacred Moments Blind Magazine A book and exhibition put four generations of photographs by the Westons on display. Monterey County Weekly Sharing the art of photography Washington County Enterprise PHOTOFAIRS Shanghai : Focus on 7 Young Photography Talents The Eye of Photography The Place We Live, The People We Love : Exhibition of Photographs from Chinese Collections The Eye of Photography To help preserve her works, Cindy Sherman is offering to destroy and reprint old photographs The Art Newspaper Arts Update: Free Indiana Museum admission; call for photography competition entries The Journal Gazette Archives : Harry Gruyaert – Photographer The Eye of Photography Iranian Photographer Hannah Darabi wins Prix Elysée 2025 ArtDependence These vintage photos by Alice Austen depict queer life and breaking with gender of norms Advocate.com The One Camera Feature Fine Art Photographers Will Love The Phoblographer Hidden talent: Trevor Etienne, photographer Carolina Panthers Julia Margaret Cameron, Portraitist Who Broke the Rules The New York Times Edward Burtynsky’s photographs convey the force of mankind’s reordering of the environment The Art Newspaper How American Photography Came Into Its Own The New Yorker Crew Videotapes, Photographs Station Activities and Hardware for Training and Inspection NASA (.gov) Teen photography entrepreneur takes joy in making people smile Yakima Herald-Republic Food Photography Packages by Hyacinth Studios Glenside Local Photographer Captures Diverse Range of Cyclists Who Cross the Williamsburg Bridge Every Day My Modern Met Hillsdale art gallery hosts conversation with photographer, professor The Daily Gazette Wellcome Photography Prize: top entries revealed ahead of winner announcement - Amateur Photographer Wellcome Photography Prize: top entries revealed ahead of winner announcement Amateur Photographer The Loss of Photography Store Culture Fstoppers Above Vermont: Photographs by Caleb Kenna Addison Independent |
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