Fourier profilometry is a method for measuring profiles using distortions in periodic patterns. The method uses Fourier analysis (a 2-dimensional fast Fourier transform) to determine localized slopes on a curving surface.
This allows a x, y, z coordinate system of the surface to be generated from a single image which has been overlaid with the distortion pattern.
It is used specifically in measuring the shape of the human cornea for use in contact lens design.1
References
References
- Bennett, Edward S.; Henry, Vinita Allee (9 September 2019). Clinical Manual of Contact Lenses. Lippincott Williams & Wilkins. ISBN 978-1-4963-9780-5. Retrieved 7 November 2024.