Image File Format

• BPP (Bits Per Pixel) - number of bits of information stored per pixel of an image
• 1 BPP = 2 Colors (Black and White)
• 4 BPP = 16 Colors
• 8 BPP = 256 Colors
• 16 BPP = 65,536 Colors
• 24 BPP = 16,777,216 Colors
• Pixel - smallest unit in the monitor screen
• Raster Graphics or Bitmap Graphics - dot matrix data structure, uses pixels
• JPEG (Joint Photographic Experts Group)

  • 90% extension name is jpg
  • applies lossy compression (removes the data permanently)
  • 24bpp
• TIFF (Tagged Image File Format)

  • lossy or lossless compression
  • high resolution, bigger file size
  • magazines, tarpaulin, billboards, publishing industries
  • less common
• GIF (Graphic Interchange Format)

  • made for/by Compuserve
  • fewer colors
  • logos and cliparts, animated clipart
  • 8bpp
  • lossless compression - as file size is compressed, picture quality remains the same
• PNG (Portable Network Graphics)

  • lossless compression
  • good substitute for GIF
  • PNG-8(first released) AND PNG-24
  • supports transparency, released png-24 for better quality for it
• Vector Graphics - comprised of paths which are defined by a start and end point
• SVG (Scalable Vector Graphics)

  • uses a two-dimensional vector graphic format
  • created by World Wide Web Consortium (W3C)
• EPS (Encapsulated PostScript)

  • file extension used in vector-based images in Adobe Illustrator
• PDF (Portable Document Format)

  • image file
• Dithering

  • process of reducing many colors to 256 or fewer
  • babawasan file size, tatanggalan ng kulay