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User interface of the Mask Editor works in a single window containing three panels; graphical window, left-hand, and bottom side control bars. Content and functionality of these panels is described below. Most of control buttons have tool tip hints; when cursor stops for a few seconds on control button, a pop-up window appears with explanation of functionality of this button appears for a few seconds .

Graphical window

Graphical window contains image and spectrum. When cursor moves on image or spectrum, its coordinates are displayed near cursor. Cursor pattern is changed from "cross" to "pointing-finger" when it is located on active form boarder.

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Forms

Forms are represented by the geometry objects Rectangle, Circle, Polygon, Wedge, and Line, which can be used to compose the mask regions. All forms behave about the same way depending on Mode, as explained below.

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Mode Zoom works for image and spectral limits.
Zoom-in image: left mouse button click-drug-release for desired region of image.
Set limits for spectrum: left/right mouse button click on desired min/max limit on spectrum.
Reset to full size: middle mouse button click on image or spectral box or "Reset" button.

Add

Add is an input method mode for forms. All forms, except Polygon, are presented by two 2D points each on image coordinate system. Input method for these forms is the same; in mode Add click-drug-release the left mouse button. Two points will be defined for click and release positions of the mouse.
Polygon is presented by the N 2D points, where N is a number of vertexes.
The N-1 points are entered by the left mouse button click, while the N-th Nth point is indicated by the right mouse button click, which closes the polygon.

Move

In the Move mode Each form can be moved or edited in this mode;
in mode Move choose the form, then use left/right mouse button click-drug-release on form boarder to move/edit the form.

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Forms can be used as regular "positive" for ROI, and selected ( inversed ) "negative" for blemish mask.
Select button serves to switch between regular and inversed forms.
In the Select mode choose the form, then use left mouse button click on form boarder. Form color is changed at selection/deselection.

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