Image Display

TCL API

C Routine Interface

DERVISH regions can be displayed using a FERMI modified version of the image display program SAOimage (FSAOimage). Once an image is displayed, all of the normal SAOimage commands are still available to the user. In addition, FERMI additions allow user defined glyphs to be drawn on the image (circles, rectangles, arrows etc.) and TCL commands to be defined in DERVISH to execute when a mouse button is pressed in FSAOimage. Pressing a mouse button in FSAOimage will cause the name of the region being displayed, and the row and column number where the mouse button was pressed to be returned to the user. Since the user has access to the data that are being displayed (via TCL region utilities), TCL procedures can be written that manipulate data based on mouse clicks.