[pdl-commit] [SCM] pdl branch, master, updated. v2.018-7-g8fe8cb5

[Derek L. <la...@sf...>]

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "pdl".

The branch, master has been updated
       via  8fe8cb50602fe74e15ae2c6ed7db7e41b4c5ed89 (commit)
       via  4ff7c4fbc50dc26c17ca8f20ed38456d35e57cdb (commit)
      from  1c009bca9afc77de94845bfd3c0e4ec741f8f0e1 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit 8fe8cb50602fe74e15ae2c6ed7db7e41b4c5ed89
Author: Derek Lamb <la...@us...>
Date:   Mon Feb 26 15:05:52 2018 -0700

    Try out a fix for memory freeing issue in warp2d.
    
    There seems to be a problem with threads and Windows and freeing
    memory.  Previously the warp2d test would crash on Strawberry Perl
    with a "free to wrong pool" error.
    
    I followed the advice from BrowserUK in this PerlMonks thread:
    http://www.perlmonks.org/?node_id=742205 to create a pass-through
    routine to free the interolation kernel's memory.  Thanks for asking
    the similar question 9 years ago, Rob!
    
    These changes don't cause any tests to fail on my Mac, we shall see
    on the AppVeyor.

commit 4ff7c4fbc50dc26c17ca8f20ed38456d35e57cdb
Author: Derek Lamb <la...@us...>
Date:   Fri Sep 29 12:57:09 2017 -0600

    Remove 'thresh' option in fitwarp2d.
    
    Singular-value decomposition of the basis vectors can return
    singular values that differ by 8--10 orders of magnitude. The
    default value of thresh (1e-5) would discard several of these smaller
    values.  That's a problem because the _inverses_ of the singular
    values are actually used to produce the solution in _svd. Discarding
    the largest singular values didn't seem to help either. Since it
    wasn't entirely clear why some of the singular values were being
    discarded, I commented out that line of code, and the associated
    documentation, so now we keep all of the singular values.
    
    I also added a detailed explanation of what fitwarp2d, _svd, and
    _mkbasis actually do.  And of course, some tests.
    
    If somebody with a lot of linear algebra experience is convinced
    of a a good reason to discard some of these singular values, we
    can revisit this (hence why I haven't removed the code, just
    commented it out for now).

-----------------------------------------------------------------------

Summary of changes:
 Lib/Image2D/image2d.pd | 165 +++++++++++++++++++++++++++++++++++++++++++------
 Lib/Image2D/resample.c |   5 ++
 Lib/Image2D/resample.h |   3 +
 t/image2d.t            |  57 ++++++++++++++++-
 4 files changed, 211 insertions(+), 19 deletions(-)


hooks/post-receive
-- 
pdl