Hi Herbie and Jeff, Yes, fps is the inverse of the frame interval. The fps means "Frame rate in frames per second" according to the Calibration class. https://imagej.net/ij/developer/api/ij/ij/measure/Calibration.html
I think it is better to maintain consistency of variables between FileInfo and Calibration class. Furthermore, in camera usage, we set a parameter of fps or exposure time (not frame interval). It's convenient to have a variable of fps in FileInfo class in order to input the frame rate directly. Best regards, Hidenao -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html
