A mask is an image used as a 1-bit overlay on the main image.
Note that there are two different dialogs with the same title "Mask Parameters" - Analysis - Mask Parameters and Analysis - Mask Parameters - File - Open - OK - Mask Parameters.
| Command: | mask open |
| Menu: | Analysis - Mask Parameters |
| Description: | Opens the Analysis - Mask Parameters dialog |
| Command: | mask load [filename] |
| Menu: | Analysis - Mask Parameters - File - Open |
| Description: | Allows the user to open an image as a 'mask'. The image is displayedin a separate graphics layer overlay on the main image with a chosen degree of transparency. |
Analysis - Mask Parameters - File - Open As - Mosaic (IRAF, WCS, WFPC2) are also supported for different input types.
The mask is displayed superimposed on the data.
| Command: | mask transparency [value] |
| Menu: | Analysis - Mask Parameters - Transparency |
| Description: | Value is 0 to 100.The GUI has an adjustable slider bar to adjust the transparency. |
| Command: | - |
| Menu: | Analysis - Mask Parameters - File - Apply |
| Description: | Applies the changes to the mask parameters |
| Command: | mask system [coordsys] |
| Menu: | Analysis - Mask Parameters - Align |
| Description: | Provides options to align the mask image with the main image based on WCS or other coordinates.Example:mask system physical |
| Command: | mask color [value] |
| Menu: | Analysis - Mask Parameters - File - Open - OK - Mask Parameters - Color |
| Description: | Set the mask color. Example: mask color red. |
| Command: | mask mark [option] |
| Menu: | Analysis - Mask Parameters - File - Open - OK - Mask Parameters - Block Pixel |
| Description: | Display mask pixels if their values are consistent with the selected option.Options are nonzero, zero, nan, nonnan, range [x] [y]. For the latter the command syntax is 'mask range [x] [y]' (no 'mark') |
| Command: | mask blend source|screen|darken|lighten |
| Menu: | Analysis - Mask Paremeters - Blend |
| Description: | Provides options (Source, Screen, Darken, Lighten) to blend the main and mask images. |
| Command: | mask clear |
| Menu: | Analysis - Mask Parameters - File - Clear |
| Description: | Clears the current mask. |
| Command: | mask close |
| Menu: | Analysis - Mask Parameters - File - Close |
| Description: | Closes the current mask. |