TEMStrain    

Line detection

Lines in a given an experimental CBED pattern can be marked manually (using a mouse in picture box with the pattern) or detected automatically (using "Line detection" command button of the program main interface). 

In order to mark a line manually, (left) click the mouse and drag the cursor along the line. Right click on the line ending disk removes the line.

In order to mark the lines automatically, click on the “Line detection” command button. Automatic detection is never 100% correct. Therefore, an inspection of the lines is recommended. It is convenient to do the inspection after indexing; after correcting lines, the pattern must be indexed again. The parameters controlling line detection can be changed in  “Settings/Miscellany/Line detection”. Besides fixing the maximal number of detected lines, one can decide whether to use a mask on Hough transform and/or whether to apply ‘backmapping’ of G.Gerig and F.Klein (Proc. 8th Int. Conf. on Pattern Recognition, Paris, France 498-500 (1986)). The latter is recommended. The colors of the lines and the size of the disk at the line ends can be changed in “Settings/Miscellany/Drawn lines”.