Autotek autocad raster design 2010 用户手册
Gamma
Specifies the gamma value for the curve. The maximum value of 10 is the
equivalent of moving the Gamma slider to the far left. The minimum value
of 0.1 is the equivalent of moving the Gamma slider to the far right.
equivalent of moving the Gamma slider to the far left. The minimum value
of 0.1 is the equivalent of moving the Gamma slider to the far right.
White
Specify a value in the text box, or move the white clipping slider, to adjust
the point above which color values are displayed as white.
the point above which color values are displayed as white.
Import
Imports a curve as a Gamma Point List (*.gpl) file.
Export
Exports a curve as a Gamma Point List (*.gpl) file.
Preview
Displays a preview of the image showing the modifications.
Click an image name to view the preview for that image. Histogram changes
apply to all images you have selected, not just to the image that is currently
previewed.
This preview does not show any display-only adjustments you may have
made to the image using the AutoCAD IMAGEADJUST command. If you
apply changes to the image using the Histogram, then all display-only
adjustments are reset to the defaults.
Click an image name to view the preview for that image. Histogram changes
apply to all images you have selected, not just to the image that is currently
previewed.
This preview does not show any display-only adjustments you may have
made to the image using the AutoCAD IMAGEADJUST command. If you
apply changes to the image using the Histogram, then all display-only
adjustments are reset to the defaults.
Apply
Adjusts the contrast curve for the image and creates a new histogram that
reflects the changes.
reflects the changes.
Apply Changes To
■
Entire Image. Applies the changes to the selected image.
■
Sub-Region. Applies the changes to the sub-region only.
Sub-Region Options
(page 391)
■
Retain Current Palette. Applies your changes to the sub-region by
mapping to the closest colors from the current palette. This option
maintains the current palette and does not affect pixels outside the
selected region.
mapping to the closest colors from the current palette. This option
maintains the current palette and does not affect pixels outside the
selected region.
■
Rebuild Palette With All Colors. Creates a new palette to best
accommodate all colors in the entire image. Because this image changes
accommodate all colors in the entire image. Because this image changes
Tonal Adjustment Tab (Histogram Dialog Box) | 323