1 / 8

Raster Graphics

Raster Graphics. 2.01 Investigate graphic image design. Raster Graphics. Also called bitmap graphics Consist of grids of tiny dots called pixels Have a fixed resolution and cannot be resized without altering image quality Edited in paint programs. Notice the pixels. Bitmap enlargement.

kayla
Download Presentation

Raster Graphics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Raster Graphics 2.01 Investigate graphic image design.

  2. Raster Graphics • Also called bitmap graphics • Consist of grids of tiny dots called pixels • Have a fixed resolution and cannot be resized without altering image quality • Edited in paint programs Notice the pixels Bitmap enlargement Image source: http://graphicssoft.about.com/od/aboutgraphics/a/bitmapvector.htm

  3. Common Raster Formats • GIF • JPEG • BMP • PNG • TIFF

  4. GIF – Graphics Interchange Format • Animation – Standard format for animation on the Internet. • Transparency – yes • Lossless compression • Colors = 256 (8-bit) • Most common format for: • Text • Clip art, animations, icons, logos • Simple diagrams, line drawings • Graphics with large blocks of a single color • Graphics with transparent areas • Images displayed on computer screens and on websites. AnimatedGif

  5. JPEG – Joint Photographic Experts Group • Animation – No • Transparency – No • Lossy compression • Colors – 16.7 M (24-bit) • High quality but larger file size than a GIF • Commonly Used For: • Desktop publishing photographs • Photographs and natural artwork • Scanned photographs • Emailing photographs • Digital camera photographs

  6. BMP - Bitmap • Animation – No • Transparency – No • Uncompressed • 256 colors • Large file size - not well suited for transfer across the Internet or for print publications • Commonly Used For: • Editing raster graphics • Creating icons and wallpaper • On-screen display Icons

  7. PNG – Portable Network Graphics • Animation – no • Transparency – yes • Lossless compression • 256 colors • Not suited for photographs • Commonly Used For: • Replacing GIF and TIFF images • Online viewing of images • See examples at http://graphicssoft.about.com/od/freedownloads/l/blfreepng07.htm

  8. TIFF – Tagged Image File Format • Animation – No • Transparency – No • Available in compressed and un-compressed formats • Compressed is advised • Colors – 16 M (24-bit) • Commonly Used For: • Storage container for faxes and other digital images • To store raw bitmap data by some programs and devices such as scanners • High resolution printing • Desktop Publishing images

More Related