Visible spectrum images are used to precisely locate the edge of
the (moving) tool in the thermal spectrum images. Knowledge of
this location is important for the correct estimation of tool
temperatures, a major factor for the analysis of tool wear. Steel
workpiece, 600 m/min surface speed. All three movies have the same
frame rate and the same field of view of about 1 mm high. The
movie on the left is a thermal movie displayed in color. The movie
in the center is a visible light movie. The movie on the right is
a thermal movie displayed in gray scale. A red line is drawn at
the precise location of the edge of the tool, as determined by the
visible light movie. For more information, see the NIST
publication "Cutting Temperature Measurements of Segmented Chips
using Dual-Spectrum High-Speed Microvideography".