Parallax TSL1401-DB Instructions Manual page 18

Here, a floating threshold with a filter factor of 6 has been selected. Now, see what happens when the
filter factor is changed to 2:
Only the most extreme rising edges are detected in this case, as indicated by the green area in the
narrow strip below the scope window. In fact, one of the most important applications of floating
thresholds is edge detection.
Another application of floating thresholds is in "texture" detection. Texture is a characteristic associated
with rapidly alternating pixel values. The seeds and herbs on a bagel represent texture, for example. In
© Bueno Systems, Inc. • TSL1401-DB (2009.10.01) Page 18 of 52