Graphical Display Possibilities

  The DISPLAY menu allows other graphical display possibilities in addition to the standard false colour image display. Figure 8 shows the menu button choices.

Figure 8: The Display Menu

The buttons have the following functions:

EXIT Exit display menu

? Explanation on each of the menu options

ARC SLICE Define an arc, by entering the end coordinate and a coordinate on the arc, and calculate the 1-D ``slice'' along this arc. This is displayed as an X/Y graph and is saved in the memory.

CONTOUR PLOT Display the ADR as a contour plot

NUMBERS Allow the user to click on coordinates and output the 11 by 11 square of pixel values around the coordinate. (If a log file is open this will be saved in the log file.)

PIXEL (X/Y) Allow the user to click on pixels and display information on the coordinate and pixel values. If the geometry of a diffraction experiment has been defined, then angles and equivalent D-spacings will be calculated and displayed.

PROJECTION Allow the user to define an arbitrary line, and a region either side of the line, and ``project'' the pixel values in the defined region onto the line. This is displayed as an X/Y graph and is saved in the memory. (This is similar to SLICE but allows averaging over several or many pixels.)

SATURATED Count the number of pixels with an intensity greater or equal to an input value.

SLICE Allow the user to click on two coordinates to define an arbitrary ``slice'' through the data. The nearest pixels to the line define the output data values. This is displayed as an X/Y graph and is saved in the memory.

STATISTICS Allow the user to define a arbitrary polygon region, and calculate a number of statistics within this region. e.g. number of pixels, total intensity, mean and standard deviation values. By first defining a background region, followed by a region around a diffraction peak, a primitive form of peak integration is available.

3-D SURFACE The ADR is displayed a 3-D surface perspective view. The surface may additionally be coloured by the current colour table. The viewing angle and many aspects of the display are controlled by a menu. An example of the display and menu are shown in Figure 9.

PRINT Save the current graphics display to a PostScript file.

3-D LINES Draw the ADR as a 3-D line plot, with hidden line removal.

Figure 9: Example of the 3-D Surface ``Viewer''