Plugins for measuring cusping and roughness

[john]

Dear All,

I am looking for an imageJ plugin which can solve the following problem. Please refer the image below. 

A straight line was drawn though the mid-axis each  of the black laths as shown. Lines perpendicular to this axial line were drawn to the peaks and valleys of the black laths.The height difference between peaks and valleys is defined  as the roughness. The spacing between the valleys is defined as a measure of cusp spacing. Right now I am doing it manually and its subjective to lots of errors. Please suggest a powerful plugin by which I can automate this process. ( ie findout the hight difference and spacing between an area of selected peaks and vallieys.

Thanks
John