1 / 11

Raster Graphics

2.01 Understand Digital Raster Graphics. 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. Raster Graphics. Can support high color depths.

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. 2.01 Understand Digital Raster Graphics Raster Graphics

  2. 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 Raster Graphics

  3. Can support high color depths. Most common type of raster is a digital photograph. Great for adding special effects. Work well for web design. Used to create images for print design. Raster graphics

  4. Native File Formats: file formats that are default file format that are proprietary to a specific program that are generally not meant to be used with other software. Standard File Formats: file formats that can be used with a variety of software programs. Standard file formats are usually created by using the “Save As” command or through exporting. Standard file formats include, but are not limited to: .gif, .jpg, .png, and .tif. Raster graphics

  5. Common Raster Formats • PSD • JPEG • GIF • PNG • TIFF • PDF

  6. 1.01 Investigate graphic types and file formats. PSD – Photoshop document • Native file format for Adobe Photoshop • Supports transparency • Supports layers, text, and effects • Large file sizes. • Industry standard for raster graphic editing

  7. GIF – Graphics Interchange Format • Standard format for animation on the Internet • Supports transparency • 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.

  8. JPEG – Joint Photographic Experts Group • Does not support animation or transparency • Lossy compression. • Colors – 16.7 M (24-bit) • High quality • Commonly Used For: • Desktop publishing photographs • Photographs and natural artwork • Scanned photographs • Emailing photographs • Digital camera photographs

  9. PNG – Portable Network Graphics • Does not support animation • Supports transparency • Lossless compression • Supports multiple color depths • PNG 8 – 8 bit color • Small Graphics • PNG 24 – 24 bit color • Basic Graphics • Commonly Used For: • Replacing GIF and TIFF images • Online viewing of images • See examples at http://graphicssoft.about.com/od/freedownloads/l/blfreepng07.htm

  10. TIFF – Tagged Image File Format • Does not support animation or transparency • Available in compressed (lossless) 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

  11. 1.01 Investigate graphic types and file formats. PDF – Portable Document Format • Open source, platform independent format that embeds fonts, images, layouts, and graphics • Allows choice of lossy and lossless compression • Supports 16 million colors • Viewable with Acrobat Reader, a free program by Adobe • Commonly used for: • Sharing files regardless of available software • Share files that can be protected from copying or editing • Publishing electronic documents and ebooks

More Related