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Some Topics in Digital Photography. Eric Stusnick Mid-Peninsula IBM PC Club August 22, 2005. Basic Elements of Digital Photography. Image Output Computer/TV Screen Color Printer Color Slides Computer Projector Professional Services. Image Input Digital Camera Flatbed Scanner
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Some Topics in Digital Photography Eric Stusnick Mid-Peninsula IBM PC ClubAugust 22, 2005
Basic Elements ofDigital Photography Image Output Computer/TV Screen Color Printer Color Slides Computer Projector Professional Services Image Input Digital Camera Flatbed Scanner Slide/Film Scanner Image Processing Computer and Software
Digital Camera Features • Camera Design • Resolution • Viewfinders • Storage Media • Additional Features • Digital File Types
Camera Design • Compact Cameras • Small size, very light weight • Fixed focus or limited zoom lens (3x) • Liquid crystal display (LCD) + optical viewfinder • Prosumer Cameras • Moderate size and weigh • Fixed zoom lens (3x to 12x) with wide-angle and telephoto adaptors available • LCD + electronic viewfinder (EVF) • Digital SLR Cameras • Larger and heavier than other two types • Interchangeable lenses • Optical through-the-lens viewfinder
Resolution • Determines the maximum amount of detail that can be contained in the digital image • Similar to grain in film photography • Measured in pixels, which are the basic light-sensing elements on the camera’s solid-state image sensor • For example, a sensor that is 1280 pixels wide and 960 pixels high would contain on its surface: 1280 x 960 = 1,228,800 pixels, which would be abbreviated 1.2 mp or 1.2 megapixels • Most cameras allow images to be stored with the maximum resolution of the camera or with several lesser resolutions
Resolution (continued) • The resolution needed depends on the ultimate use of the image. If one only wants to send snapshots via e-mail to be viewed on a computer monitor then a resolution of 2 mp or less is adequate. • The resolution required for color printing depends on the size of the color print desired. Although there are many different opinions on how many megapixels it takes to make a good print of a given size, the table that follows is a reasonable guide
Print Size Pixel Size Resolution 4” x 5” 960 x 1200 1 mp 5” x 7” 1200 x 1680 2 mp 8” x 10” 1920 x 2400 5 mp Resolution (concluded) These resolutions represent best-case situations. Acceptable images may be obtained with lower resolutions. I have obtained quite good 8”x10” prints With 2 mp resolution.
Resolution vs. Noise • The more pixels you place on a sensor of a given size, the smaller each pixel must be. • A pixel converts the light energy entering it into electrical energy - a small pixel produces less electrical current that does a larger pixel. • The smaller the pixel, the more amplification you must have to get the required signal level. • The more amplification provided, the more electrical noise produced. • Thus 8 mp sensors have inherently more noise than do 5 or 6 mp sensors of the same size. • Don’t get more megapixels than you need for the type of photography you intend to do.
Viewfinders • Most digital cameras allow the image to be seen with a liquid-crystal display (LCD). However, continuous use of the LCD reduces battery life. • Most compact cameras also have an optical viewfinder which, like the viewfinder in a rangefinder camera, does not quite give the same image as is being recorded. • Prosumer cameras have an electronic view-finder (EVF) which gives the same image as does the full-size LCD but which uses much less power. • LCDs and EVFs also provide additional information about the camera setting, superimposed upon the image being recorded.
Storage Media • The size of a digital image file depends on the resolution used and the format of the file. File sizes from a few tens of kilobytes (kB) to tens of megabytes (mB) are common. • The most common storage media in digital cameras are: • Compact flash card (CF) • Smart media card (SF) • Memory stick • Multimedia (MMP) • Secure digital (SD) • XD picture cards
Additional Features • Shooting modes • Macro (getting close to subject) • Preset configurations (e.g. sports-action, portraits, landscapes, night scenes) • Burst mode (taking several images in quick succession) • Exposure controls • Full automatic - Exposure • Shutter priority compensation • Aperature priority - Color temperature • Full manual balance
Additional Features (concluded) • Image stabilization – compensates for small motions of the camera • LCD zoom – allows you to magnify the image on the LCD to check details of the recorded image • Digital zoom – artificially magnifies a portion of the image to be recorded; does not increase the amount of detail. • Short motion picture capability • Voice message recording capability
COMPACT CAMERAS Canon PowerShot S500 Olympus Stylus 410 Nikon Coolpix 5200
PROSUMER CAMERAS Canon PowerShot Pro 1 Olympus C-8080 Nikon CoolPix 5700
Digital SLRs Canon Digital Rebel Nikon D70
Digital File Formats • Maximum resolution: • TIFF (Tagged Image File Format) • Raw file (name and format proprietary to the camera) • Compressed files: • JPEG (Joint Photographic Experts Group) • Movie files: • MPEG (Moving Pictures Experts Group) • Sound files: • WAV
Image Editors • Basic Software • Microsoft Picture It! Photo Premium 10.0 ($50) • Roxio PhotoSuite 7 Platinum Edition ($30) • Intermediate Software • Adobe Photoshop Elements 3.0 ($100) • Jasc Paint Shop Pro Studio ($80) • ULead PhotoImpact 10.0 ($90) • Advanced Software • Adobe Photoshop CS2 ($600)
Color Printers Among color printers – laser, thermal inkjet, dye sublimation, and inkjet – the inkjet is the most common. Common features to consider are: • Maximum resolution – measured in dots per inch (dpi) – higher is better • Dot size – measured in picoliters (pL) – smaller is better • Printing speed - higher is better • Connectivity – USB or Firewire (IEE 1394) (faster) or parallel port (slower)
Color Printers (concluded) • The most popular color inkjet printer lines are: • Epson Stylus Photo series • HP Photosmart series • Canon Photo series
What if I Don’t Want to Use a Computer? • Several years ago you had to be computer savvy to get prints from digital images.
What if I Don’t Want to Use a Computer? (continued) • Three years ago printer manufacturers provided slots for digital storage cards, so you didn’t need to have a computer to make prints.
What if I Don’t Want to Use a Computer? (continued) • At that time, there were only three types of digital storage cards commonly used. Card Types: Smart Media, Compact Flash, Sony Memory Stick
What if I Don’t Want to Use a Computer? (continued) • But, as time went on, more types of digital storage cards were developed. • Now, there are at least 10 types. Smart Media Compact lash Memory Stick Memory Stick Pro Memory Stick Duo Multimedia (MMC) Reduced Size Multimedia (RS-MMC) Secure Digital (SD) XD Picture Cards Microdrives
What if I Don’t Want to Use a Computer? (continued) • So, a few years ago, manufacturers who made both cameras and printers provided for direct connection of their cameras to their printers.
What if I Don’t Want to Use a Computer? (concluded) • Recently a technology (called PictBridge) was standardized so that any compatible camera can be connected directly to any compatible printer.
PictBridge Supporters • Manufacturers who support, or are planning to support, the PictBridge standard are: Canon, Epson, HP, Sony, Olympus, Konica-Minolta, and Fuji.
Bluetooth Technology • More recently still, some cameras use Bluetooth wireless technology to transmit images to computers and printers. • Some printers have built in Bluetooth receivers to receive these transmitted pictures.
Other Ways To Get Prints • Digital storage cards can be taken to a local photo processor and selected images transferred to their photo printing systems. • Longs • Wal-Mart • Costco • Wolf Camera
Other Ways To Get Prints • If you have a computer with an Internet connection, you can upload digital images to photo processors and have the prints mailed to you or picked up locally. • Some photo processors allow you to post digital images on their web sites, where others can view them and, if desired, order prints of selected images.
Film Photographers Aren’t Forgotten • Some photo processors will create digital images from your film and • return a CD with digital images along with your prints or slides, • post your digital images on their web sites, where others can view them and buy prints.
Why Get Prints At All? • Increasingly, folks with computers and Internet connections are simply e-mailing digital images to each other and viewing them on their computers without every printing the images. • And slide shows are being replaced with television shows or digital projection.
Photography and the Internet • Photographic Services • Photo Magazines • Equipment Reviews • Photographers • Camera Groups • Photograph Display • Instruction – General Photography • Instruction – Digital Photography • Instruction – Photoshop • Instruction – Photoshop Elements
PHOTOGRAPHIC SERVICES • Costco: http://www.costcophotocenter.com • Walmart: http://www.walmart.com/catalog/catalog.gsp?cat=175779 • Ritz/Wolf: http://www.ritzpix.com • Longs/Walgreens (Fujifilm): http://www.digitalcameradeveloping.com • Kodak (Snapfish): http://www.snapfish.com • Shutterfly: http://www.shutterfly.com
PHOTO MAGAZINES • http://pcphotomag.com/ • http://www.a-digital-eye.com/ • http://www.digitalimagingmag.com/ • http://www.edigitalphoto.com/ • http://www.megapixel.net/ • http://www.naturephotographers.net/ • http://www.photographic.com/ • http://www.vividlight.com/
EQUIPMENT REVIEWS • http://www.dcresource.com/ • http://www.dcviews.com/ • http://www.digitalreview.ca/ • http://www.digitalslr.org/ • http://www.dpreview.com/ • http://www.imaging-resource.com/ • http://www.photo.net/neighbor/one-subcategory?id=2 • http://www.photographyreview.com/ • http://www.steves-digicams.com/
PHOTOGRAPHERS • http://brucedale.com/ • http://georgiabyte.com/ • http://users.chartertn.net/cliffs/ • http://www.amateurdigitalphotogallery.co.uk/ • http://www.leppphoto.com/ • http://www.moose395.net/ • http://www.smallgallery.com/ • http://www.tawbaware.com/maxlyons/ • http://www.wtv-zone.com/cal555/index.html#prev
CAMERA GROUPS • Northern California Council of Camera Clubs: http://n4c.org/ • Photographic Society of America: http://www.psa-photo.org/ • PSA Electronic Imaging Division: http://psa-eid.org/
PHOTOGRAPH DISPLAY • http://www.e-photoworks.com/albinator/ • http://www.fredmiranda.com/ • http://www.pbase.com/uzgroup • http://www.photo.net/photodb/ • http://www.photocritique.net/ • http://www.photosig.com/
INSTRUCTION – GENERAL PHOTOGRAPHY • http://groups.msn.com/Asktheoleproaboutphotography/ • http://medfmt.8k.com/mf/permits.html • http://www.betterphoto.com/home.asp • http://www.lightingmagic.com/ • http://www.photonhead.com/simcam/
INSTRUCTION – DIGITAL PHOTOGRAPHY • http://graphicssoft.about.com/ • http://www.computer-darkroom.com/ • http://www.hplearningcenter.com/ • http://www.larry-bolch.com/ • http://www.luminous-landscape.com/ • http://www.normankoren.com/ • http://www.quiknet.com/~frcn/Camera.html • http://www.shortcourses.com/
INSTRUCTION - PHOTOSHOP • http://epaperpress.com/psphoto/index.html • http://www.myjanee.com/ • http://www.photoshoproadmap.com/ • http://www.photoshopvideos.com/
INSTRUCTION – PHOTOSHOP ELEMENTS • http://graphicssoft.about.com/cs/photoshopelements/ • http://member.melbpc.org.au/~pshipley/ • http://www.hiddenelements.com/