Integrating a Series of Images

The INTEGRATE command is equivalent to the INTEGRATE command within the POWDER DIFFRACTION INTEGRATE command (See Section 17.18, Page ).

First you need to know geometrical parameters e.g. beam centre and detector tilt angles. For this you may want to first input data and treat it within the POWDER DIFFRACTION interface.

The FILE SERIES INTEGRATE command prompts for the first and last file in the series as with the other commands. A detector distortion correction form allows optional correction of non-uniformity of response and spatial distortion. The first image in the series will be input and corrected as specified.

The masking menu appears automatically and allows both masking and selection of a sub-region with the ZOOM-IN command. When satisfied click O.K.

The experiment geometry and the integration control forms are presented for completion. There is the option to save each 1-D integrated scan to an output file as the integration is completed. If this option is selected the output file type and the file extension will be asked. The output files will have the same base name as the input files.

Once the menus and forms have been completed the integration of the first image will proceed, and the same treatment will then be repeated automatically for all subsequent images in the defined file series. Each 1-D integrated scan is displayed as the data is integrated. At the end the whole of the scans are left as a 2-D image in the main data array. The X-direction is the $2\theta$ direction, and the Y-direction has the direction scans, with the first at the bottom. This data can be saved or used for further analysis.

Often there will be many more pixels in the horizontal direction than in the vertical (the scans). The output will be a thin rectangle, and details may not be seen. To see the full detail use the OPTIONS menu command ASPECT RATIO to turn off the automatically correct aspect ratio. The image will then fill the whole of the current image output area.

An example of the results left in the main program array after the INTEGRATE command are shown in Figure 23.

Figure 23: An Example of the Results of the INTEGRATE Command