Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. In a preferred embodiment, the method begins by offsetting the initial paths through the obstacles from the obstacles to form adjusted paths. In accordance with this protocol, if the sending processor does not receive a receipt acknowledgement for the sent data from the other processor before the end of a resend time period measured from when the data was sent, then the sending processor resends the data to the other processor after the end of the resend time period. The toilet paper roll holder is configured to be substantially stationary when toilet paper is removed from a roll of toilet paper supported by the holder. Several configurations are also disclosed for alternate deactivation coil designs and mounting schemes. The bolt is assembled with a commercial k seal, a collar having a CTE much less than that of the bolt, and another k seal.