This class implements the tag tree decoder. A tag tree codes a 2D matrix of integer elements in an efficient way. The decoding procedure 'update()' updates a value of the matrix from a stream of coded data, given a threshold. This procedure decodes enough information to identify whether or not the value is greater than or equal to the threshold, and updates the value accordingly.

In general the decoding procedure must follow the same sequence of elements and thresholds as the encoding one. The encoder is implemented by the TagTreeEncoder class.

Tag trees that have one dimension, or both, as 0 are allowed for convenience. Of course no values can be set or coded in such cases.

'Declaration
 
Public Class TagTreeDecoder 

public class TagTreeDecoder