sis-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Martin Desruisseaux (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SIS-176) Provides an optimized transform the diagonal matrices
Date Wed, 09 Jul 2014 15:12:04 GMT
Martin Desruisseaux created SIS-176:
---------------------------------------

             Summary: Provides an optimized transform the diagonal matrices
                 Key: SIS-176
                 URL: https://issues.apache.org/jira/browse/SIS-176
             Project: Spatial Information Systems
          Issue Type: Improvement
          Components: Referencing
            Reporter: Martin Desruisseaux
            Priority: Minor


{{ProjectiveTransform}} handles arbitrary matrices in a generic way. However in practice,
many matrices are diagonal + a translation transform. We may get some performance improvement
if we write a specialized transform class for such matrices, because it would replace a O(_n_²)
operation by a O(_n_) one (_n_ is the matrix size).




--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message