 |
|
|
|
Web browsers recognize only
compressed image file formats/types. The most common of these formats are
JPEG's (JPG) and GIF's. Each of these file types have special characteristics
that will dictate
what type to use to
achieve the resulting image your viewer will see; i.e., transparent .gifs,
animated .gifs, full range of color .jpgs. | |
 Scanned grayscale
|
 Scanned grayscale
|
 Scanned
True Color
|
 Scanned True Color
|
The image of the leaf above
left is the same as the JPG above right, however it was saved as a transparent
gif using the Help/Export Transparent Image... option in Photoshop.
Notice the
white background of the JPG was selected to be transparent to the browser
and this Photoshop wizard walks you through the steps to create the resulting
online image. All images exist in a rectangular world. If you want the
image to appear in
a colored
table
cell
or over
a background
image
as a
freeform
object, such as the one on the left,
you
will choose the transparent gif file format. |
|
Continuous color .jpgTrue Color Mode (Millions of colors) The more JPG compression applied to the uncompressed image the lower the quality of the resulting image. |
Restricted palette .gifGifs can have a total color palette of 256 or less colors, because of this color banding can result. See example above.
|
| File
Type | File Size | Thumbnails | Others | Photoshop
|
||
 |
 |
|
| Gene Leisz (leiszgj@uwec.edu) Updated: August 28, 2003 |
||
