Classification proceeds as a two-step process. In the
first step, a class pruner creates a shortlist of character
classes that the unknown might match. Each feature
fetches, from a coarsely quantized 3-dimensional lookup
table, a bit-vector of classes that it might match, and
the bit-vectors are summed over all the features. The
classes with the highest counts (after correcting for
expected number of features) become the short-list for
the next step.
Each feature of the unknown looks up a bit vector of
prototypes of the given class that it might match, and
then the actual similarity between them is computed.
Each prototype character class is represented by a
logical sum-of-product expression with each term
called a configuration, so the distance calculation
process keeps a record of the total similarity evidence
of each feature in each configuration, as well as of each
prototype. The best combined distance, which is
calculated from the summed feature and prototype
evidences, is the best over all the stored configurations
of the class.
Classification proceeds as a two-step process. In thefirst step, a class pruner creates a shortlist of characterclasses that the unknown might match. Each featurefetches, from a coarsely quantized 3-dimensional lookuptable, a bit-vector of classes that it might match, andthe bit-vectors are summed over all the features. Theclasses with the highest counts (after correcting forexpected number of features) become the short-list forthe next step.Each feature of the unknown looks up a bit vector ofprototypes of the given class that it might match, andthen the actual similarity between them is computed.Each prototype character class is represented by alogical sum-of-product expression with each termcalled a configuration, so the distance calculationprocess keeps a record of the total similarity evidenceof each feature in each configuration, as well as of eachprototype. The best combined distance, which iscalculated from the summed feature and prototypeevidences, is the best over all the stored configurationsof the class.
การแปล กรุณารอสักครู่..