Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 70

WiseImage – User's Guide
- or -
Start the operation without choosing an image.
Select an image you want to process from the dialog box.
For more detailed information on the selection procedure see "Selecting
*
Several Images" on page 20.
Converting to 8-bit indexed
This command supplies the user with a way of reducing the file size of an image by
changing its color depth (number of bits that store color information) form 24 bit per
pixel to 8 bit per pixel. This is also a way to tune colors precisely.
When you apply this command to a RGB color image, the number of colors used
reduces to 256 (or less). You can further reduce this number by deleting selected
color or colors or by merging several colors in one.
You can also replace selected colors and add them to palette.
Note that color filtering (blurring, unsharp mask and medianning) can be applied
only to color images. Hence there would be a good idea to apply color filters to RGB
image before converting it to image of indexed colors.
Choosing the rImage > Convert to > Convert to 8-bit indexed produces a dialog box
with tools for manipulating with palette and the individual colors and a preview
window.
To convert an image to 8-bit
Select the images to be processed on the screen. Choose Convert to 8-bit
indexed from the rImage menu,
- or -
Start the operation without choosing an image.
Select an image you want to process from the dialog box.
* For more detailed information on the selection procedure see "Selecting
Several Images" on page 20.
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