Example - radii mmt using circle tool

04/05/2005

For estimation of radii of regions that are not perfectly circular, and may not be entirely within the field of view.

1) Load image.
a) If a gray scale image stored as a JPEG file, make sure the option to open color images as gray level is set (the default).
b) Zoom, scroll, etc. to see image
Perhaps use zoom buttons.
Zoom / to screen.
2) Position circle tool on area of interest.
a) TOOLS / circle
b) Image! selectes the front image.
c) Circle on! Displays circle.
If circle not visible, use 'Reset!', because last used circle is now out of field of view.
d) Drag circle by the center handle (tiny cirle).
e) Change circle size with the outer handle (tiny circle). Note that directional or angular position relative to center is changable, but does not affect any recorded data.

To measure objects that are partly outside the field of view,

a) 'drag' - click until it says 'drag!
b)Drag image with mouse until center of object is within the field of view.
c) Click drag to turn drag off (no drag! - this is the default).
Center circle on object, while keeping outer tiny circle within the field of view so you can drag it to adjust the size of the circle tool.
3) Record measurement.
a) record 1 This saves the data internally, and displays the circle on the image.
b)Record other measurements for this image if desired.
4) Save measurements to file:
File / save circles
This saves one file per image. Best to clear the circles so that data is not duplicated in the next file.
5) Concatenate data files as desired. This puts all of the measurements into one text file. Image file names in last collumn (lx04m & later).
File / concatenate
Note these text files are tab delimited ASCII, and readable directly into Excel.