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Computer  Configurations
Digital-Image File Storage

Photography (Advanced) - Advanced manual for photography and other graphic techniques
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These software packages are capable of doing more than you could accomplish in a conventional darkroom; they  do  it  much  quicker. Advancements in the development of software packages have made it possible to transform computer imaging from minicomputers or mainframe computers to  desktop  models.  Because  software  is  continually being improved and updated, the application of specific computer  software  is  not  addressed  in  this  chapter. Software packages are used to modify and enhance images and to control input and output devices. DISPLAYS Most of the computer color monitors available for desktop computers have far less resolution than a digital photograph. A number of graphic boards are available for computers that can produce Super VGA resolution of more than 1,000 by 1,000 pixels on cathode-ray tube (CRT) color displays. A high-resolution, noninterlaced monitor and a 24-bit video card are essential viewing images. A 24bit video card allows for 16.8 million colors  to  be  displayed. Graphic images displayed on a computer monitor are  bit-mapped  images.  Bit-mapped  images  are produced by a pattern of dots. Bit-mapped images are sometimes called "pixel-oriented," "raster," or "paint" images.  At  high  resolutions,  the  individual  dots  are  not discernable. When   you   are   working   on   enhancement, modifications,  and  page  makeup  of  digital  images,  it  is important  for  you  to  view  what  you  have  done. Therefore, a calibrated color monitor is important so you can see the images or “soft proofing” before you print the images. Monitors for electronic imaging use the additive system. They combine red, green, and blue and add it to the black surface of the screen to create colors. Monitor quality depends on screen resolution. The finer the pitch of the screen, the sharper the image. The PITCH of the screen is the size of a single pixel. On color CRT screens, a single pixel is composed of three phosphor dots: red, blue, and green. These phosphor dots are struck by an electron gun through a screen or mask. The resolution of the CRT depends on the size of the holes in the mask. The holes in the mask are 3-12 Figure 3-8.—Electronic imaging workstation centered around an AT computer.







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