A Novel Method for Laser Peak Detection with Subpixel Accuracy for the Rail Corrugation Measurement

Figure 17

Image captured from a sample of corrugated rail (wavelength of 5 cm and amplitude of 50 micrometer). (a) Captured image from 3 laser beams. (b) Light intensity of each laser and its power (S/N ≈30 dB).

(a)

(b)