raster graphics
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/1.jpg)
Raster Graphics2.01 Investigate graphic image design.
![Page 2: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/2.jpg)
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 Bitmap enlargement
Notice the pixels
Image source: http://graphicssoft.about.com/od/aboutgraphics/a/bitmapvector.htm
![Page 3: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/3.jpg)
Common Raster Formats
• GIF• JPEG• BMP• PNG• TIFF
![Page 4: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/4.jpg)
GIF – Graphics Interchange FormatAnimation – 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.
Animated Gif
![Page 5: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/5.jpg)
JPEG – Joint Photographic Experts Group
X Animation – No X 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
![Page 6: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/6.jpg)
BMP - Bitmap
X Animation – No X 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
![Page 7: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/7.jpg)
PNG – Portable Network Graphics
X 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
![Page 8: Raster Graphics](https://reader036.vdocument.in/reader036/viewer/2022082711/56812e5d550346895d9403c4/html5/thumbnails/8.jpg)
TIFF – Tagged Image File FormatX Animation – No X 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