On the recognition of wood slices by means of blur invariants

• We improved the system for visual recognition of wood slices presented earlier.
• We identified certain mistakes in the original system.
• Our method is based on moment invariants with respect to blur.
• TSpecific invariants to motion blur and out-of-focus blur are presented.

In the recent paper [6] the authors presented an automatic system for visual recognition of wood slices, which are placed on a moving platform. The original method was based on moment invariants. In this comment we explain the mistakes of the method and show how to properly use moment invariants in a wood-slice recognition system. This correction immediately leads to an increase of the recognition rate.