Various techniques for temporally filtering raw image data acquired by an image sensor are provided. A resistance heating assembly applies an electrical current to a work part comprising a sheet of high-tensile steel having a heat-resistant plating to improve formability. The first doped layer includes a first plurality of protrusions extending from a first connecting base portion. Other embodiments of the cover include solid wood panels with stain and lacquer on both sides of the panels. The front surface extends from the grating said disc surface to a distal end of the grating tooth, and is adapted to be brought into contact with said food during use of said food processor.