Resolution analysis programs
These 2 Aladdin programs make QA a little easier by automatically measuring FWHM of any line or slit source image.
The files input must be 1024x1024 pixels, and it is up to you to pick the correct program for your file.
If the lines are parallel with the Y axis use resy.
If parallel with the X axis use resx
The programs as they are currently set measure FWHM in approximately 100 positions (using the NEMA slit phantom) and return the average and the maximum values.
The peaks are found automatically, so you can use pretty well any line spread phantom, and the next line of measurements is decided by the spacing parameter.
The spacing between lines of measurements is currently set to 128 pixels but you can see in the script it is very easy to change this.
So where do you get the line object from? Well you can use virtually any. Maybe the Veenstra DLP phantom, or you can just use a single line such as a capillary. For intrinsic measurements you could use a NEMA specification slit phantom. I bought one of these from Bartec Technologies. Below is a raw image of
the test object and output from the program resy.