) from
the Tool palette or choose Color Workspace
from the Window menu to open the
Color Workspace. (The Color Workspace will also open automatically whenever
you create a patch.)The Color Workspace allows you to mask an image or patch area by color.
Select the Color Workspace tool () from
the Tool palette or choose Color Workspace
from the Window menu to open the
Color Workspace. (The Color Workspace will also open automatically whenever
you create a patch.)
Use the Color Workspace to fine tune masks and to deal with problem edges and complex detail. The Color Workspace can be very helpful when you have an edge that is too complex to accurately paint with a brush or when only pixels of a particular color should be masked.
To fine tune and create masks with the Color Workspace,
you select colors either directly from your image (using the Color Sampler
tool 
) or on the Color Workspace display itself. In both
cases, the selected colors are highlighted on the image and on the display.
The default highlight color is yellow. You can change the highlight color on the Workspace Settings dialog.
You can then choose to assign those colors to one of
the three types of mask with the Add buttons (
). You can
also choose “Unassigned” (grey bucket) to erase any masks currently applied
to the selected color.
The Color Workspace has several controls to help you identify and mask pixels by color:
Views: Allows you to toggle the display of colors
masked with a particular type of mask. (Use the grey view button to show
or hide unmasked colors.)
Mode: The type of color graph shown. You can choose
from a histogram or a 2D chart.
Axes: Allow you to choose the color attributes to
use as the horizontal and vertical axes.
Add buttons: Assigns the corresponding type of mask
to the currently selected colors. For example, clicking the red bucket
will assign the delete mask to all pixels of the selected color. Click
the grey bucket to remove any masks from the selected colors.
Resolution: Determines the number of colors shown on the color graph. Set to Coarse to combine similar colors so that fewer entries are displayed. Set to Fine to show each unique color as an individual entry.
Note: You can resize the Color Workspace window, which can be helpful when you increase the color resolution setting.
(If you are using the Color Workspace with a patch, make sure the patch is active.)
Select the Color Sampler tool.
If not already shown, the Color Workspace will open.
Click on the image to select a color. If a patch is active, you must select within the patch.
Hold the Shift key down while clicking to add
colors to the selection. Hold the Alt key down to remove colors from the
selection.
The selected colors are highlighted on the Color Workspace and any
pixels in the image or active patch of the selected colors are also highlighted
on the image.
Note: To increase the tolerance of the color selection, set the color resolution toward coarse.
Click the Add button for the corresponding mask type. (For example, click the red bucket to mask pixels in the color selection with the delete mask.)
(If you are using the Color Workspace with a patch, make sure the patch is active.)
Open the Color Workspace, if necessary.
Adjust the Mode, Axes, and Resolution to best differentiate the colors you wish to mask.
Click on the color graph to select a color. You can also drag a marquee on the graph to select several colors at once.
Hold the Shift key down while clicking or dragging
to add colors to the selection. Hold the Alt key down to remove colors
from the selection.
The selected colors are highlighted on the Color Workspace and any
pixels in the image or active patch of the selected colors are also highlighted
on the image.
Click the Add button for the corresponding mask type. (For example, click the red bucket to mask pixels in the color selection with the delete mask.)
(If you are using the Color Workspace with a patch, make sure the patch is active.)
Open the Color Workspace, if necessary.
Adjust the Mode, Axes, and Resolution to best differentiate the colors you wish to remask.
Toggle off the View buttons so that only colors assigned to the mask of interest are shown.
Select the colors to remask.
Click the Add button for the new mask type.
(If you are using the Color Workspace with a patch, make sure the patch is active.)
Open the Color Workspace, if necessary.
Adjust the Mode, Axes, and Resolution to best differentiate the colors you wish to unmask.
Select the colors to unmask.
Click the grey Add button remove any mask from the pixels in the color selection.