Image Editing Basics - PowerPoint PPT Presentation

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Image Editing Basics

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  1. Image Editing Basics • Resolution • Screen resolution • Printer resolution

  2. Image Editing Basics • Resizing pictures • Cropping • Scaling • How does this change the size of the picture?

  3. Image Editing Basics • Common functions • Crop • Brightness and Contrast • Color Balance (autobalance) • Transparency

  4. Image Editing Basics • How to do it “on the cheap” • MS Office picture toolbar • crop; brightness & contrast; transparent colors • MS Paint • File conversion; add text (not much else!) • GIMP – free image editing software • Scanner or camera purchase • Look for Adobe Photoshop Elements or Photoshop Album with purchase

  5. Image file formats • JPEG – stands for Joint Photographic Experts Group • .jpg or .jpeg • Most common photographic file on WWW • “lossy” compression

  6. Image Editing Basics • Common functions • Crop • Brightness and Contrast • Color Balance (autobalance) • Transparency

  7. Image file formats • JPEG – stands for Joint Photographic Experts Group • .jpg or .jpeg • Most common photographic file on WWW • “lossy” compression

  8. Image file formats • GIF or CompuServe GIF • .gif • “Graphics Interchange Format” • Good for small images on WWW • Has “lossless” compression, so sharpness is retained • Limited to 256 colors • Not good for larger photos

  9. Image file formats • TIFF or TIF • .tif or .tiff • “Tagged Image File Format” • “Lossless” compression • Good file format to choose for print publications • Much larger in size www.bugmenot.com www.bugmenot.com

  10. Image file formats • Bitmap or Windows Bitmap • .bmp • Used primarily within Windows as a way to display images (screenshots or desktops) • PICT • .pict • Essentially serves the same function as bitmaps, but for Apple computers

  11. Photo Sharing and Printing • Too numerous to mention all! • Flickr • Webshots • MyPhotoAlbum • Yahoo • PhotoBucket • And many many others

  12. Photo Sharing and Printing • Free to create albums and let others see • Pay to print photos • NOT SECURE !!!

  13. General Considerations … • For WWW – file sizes kept under 100-200 K • For print – the larger the resolution the better • For school – no identifying information

  14. Digital Camera Basics … • Lens – digital vs. optical zoom. Can you add additional lenses/filters? • Batteries – AAs? Rechargeable batteries? If rechargeable, how? • Look for Li-ion rechargeable if possible

  15. Digital Camera Basics … • Lens – digital vs. optical zoom. Can you add additional lenses/filters? • Batteries – AAs? Rechargeable batteries? If rechargeable, how? • Look for Li-ion rechargeable if possible

  16. Digital Camera Basics … • Speed of shot – how long does it take from the time you press the shutter button for the camera to take the picture? How long until you can take another picture? • Storage – what type of storage? How much? • The type of memory card you use is dictated by which digital camera you buy. These physically different cards are -not- interchangeable. • Secure Digital (SD), CompactFlash (CF), SmartMedia (SM), Memory Stick (MS), MultiMediaCard (MMC) and xD-Picture Card (xD).

  17. Digital Camera Basics … • Image format – what types of images will your camera take? • JPEG • TIFFs • Image quality – what will you be using your camera for? • Small prints (4x6) - 2 megapixel camera is sufficient (for PowerPoint, even less will do!). • Poster size prints - 5 megapixel or more • More megapixels does not always mean better pictures!