With AutoCAD Raster Design toolset, you can insert several types of images into a drawing, and display them in various ways. The color map provides the main source of display control. AutoCAD Raster Design toolset recognizes the inserted image type and provides a default color map. Later, you can edit the color map, or with some image types, create a new insertion with a different type of color map.
| File Type | Data Structure (bits/pixel) | Default Color Map | Insertion Type |
|---|---|---|---|
| Bitonal | 1 bit | Bitonal | Bitonal |
| Grayscale | 4 or 8 bit | Image Adjust | Grayscale |
| Index Color | 8 bit (256 colors) | Image Adjust | Index Color |
| True Color | 24 or 32 bit | Image Adjust | True Color |
| Digital Elevation Model | Floating Point | Palette | Palette Color |
| Single-Band Integer | 16 or 32 bit | Image Adjust | Palette Color, Grayscale |
The different color maps have the following attributes:
- Bitonal color map controls the color assigned to the linework (foreground color) and background of a bitonal image.
- Image adjust color map uses the AutoCAD Image Adjust dialog box to control values for brightness, contrast, and fade.
- Palette color map has many options available for interpreting and displaying the data. For example, you can display surface elevation, slope, or aspect, choose the number of data ranges, and assign a color to each range.
- Band assignment color map specifies which data bands to display and which color channel (red, green, or blue) to use for each one. By assigning bands to channels in particular ways, you can create false color images for analytic purposes, such as the display of vegetation or water features.
For related information, see Editing Color Maps and About Supported Image Formats.