digital photography by mike volker. what is digital photography? a form of photography that uses...
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Digital Photography
By Mike Volker
What is Digital Photography?
• A form of Photography that uses digital technology to make images of subjects
• Replaced film
UsageCan be displayedPrintedStoredManipulatedTransmittedArchived
All without chemical processing
How do I digitize an image?Scanning a conventional image to the
computerScanning 35 mm Slides to the computerMoving to the computer from a memory
cardCopying from a Web Site
Digital and Analog SystemsDigital is a system that uses discrete
(discontinuous) valuesNon-digital (analog) uses a continuous
range of valuesDefinition: comes from the word digit
and digitus which means finger. Used for discrete counting
Sensors and Storage Image Sensors
Read the intensity of lightMemory Devices
Store the digital image information Nearly all digital cameras use built-in
and /or removable solid state flash memory
Quality of ImagesPixel Count (megapixels)Lens QualityCapture medium – CMOS, CCD, FilmCapture format
RAW, TIFF, JPEG, etc. (digital) 135 film, 120 film, 5x4, 10x8 (film)
Processing Digital and or chemical processing of
negative and print
Pixel CountsNumber of pixels for a given maximum
resolution Product n = w x h
Image 1600 x 1200 Yields 1.92 megapixels (192,000 pixels)
Presidential Portrait First official U.S.
Presidential Portrait to be taken with a digital camera.
Majority of Professional news photographers use digital cameras
Usage of photographsSnapshot PhotographersCell Phones (inferior images)EmailWorld Wide Web (www)Digital picture framesCourt proceedings
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