Masks and Channels Digital Imaging. Masks Let you isolate and protect parts of an image Based on a...
-
Upload
simon-palmer -
Category
Documents
-
view
218 -
download
0
description
Transcript of Masks and Channels Digital Imaging. Masks Let you isolate and protect parts of an image Based on a...
Masks and Channels
Digital Imaging
Masks
Let you isolate and protect parts of an image
Based on a selection The area not selected is masked or
protected from editing Helpful to use because you can create a
selection to save time if you want to re-use it later Also effective with color changes and filter
effects
Quick Masks
These are temporary masks, they are helpful when trying to make a selection of a difficult shape / image
This converts a selection border into a temporary mask
It is discarded once it is converted to a selection It is not saved unless you make it a
permanent selection
When in Quick Mask mode
A red overlay appears to mask and protect an area outside of the selection
You can only apply changes to the unprotected area that is visible and selected
PS defaults to Grayscale mode the foreground color defaults to black and
the background color defaults to white
When in Quick Mask mode
Painting with white erases the mask and increases the selected area
Painting with black adds to the mask and decreases the selected area
On the toolbar is where the QUICK MASK icon is located.
Puts you into Quick MASK MODE
Puts you into STANDARD MODE
Permanent Masks
Stored on the Channel palette (next to the layers tab on the Layers palette)
Get stored as a grayscale channel called alpha channel
Channels
PS uses channels to store an image’s color information and information about spot color
Channels do not print
Alpha channels
A storage area for information Use to create a more permanent mask
by storing it and editing it Saved on the channels palette Can be added or deleted Can be edited using painting or editing
tools
The Extract Command
Provides a sophisticated way to isolate a foreground object from its background
Objects with wispy, intricate or indefinable edges can be clipped from their background with a minimum amount of work
Where to find the Extract command
Filter > Extract