Vadim Pisarevsky
284e5231c5
Merge pull request #11171 from codingforfun:fix_11143
2018-03-28 12:47:37 +00:00
codingforfun
24e2e0d3f9
#11143 [FIX] Normalize node risk with sample weight sum
...
In case of regression trees, node risk is computed as sum of squared
error. To get a meaningfull value to compare with it needs to be
normalized to the number of samples in the node (or more generally to
the sum of sample weights in this node). Otherwise the sum of squared
error is highly dependend on the number of samples in the node and
comparision with `regressionAccuracy` parameter is not very meaningful.
After normalization `node_risk` means in fact sample variance for all
samples in the node, which makes much more sence and seams to be what
was originaly intended by the code given that node risk is later used as
a split termination criteria by
```
sqrt(node.node_risk) < params.getRegressionAccuracy()
```
2018-03-27 15:39:36 +02:00
Maksim Shabunin
a769d69a9d
Fixed several issues found by static analysis
2017-06-28 18:06:18 +03:00
Maksim Shabunin
32d4af36e2
Fixing some static analysis issues
2017-06-27 14:30:26 +03:00
chrizandr
d22df8c41f
Add wrappers for load functions for DTrees and Boost classifiers
2017-01-29 15:55:38 +05:30
Maksim Shabunin
1307bb1d03
Merge pull request #6314 from mvukad:bugfix_dtreeswrite
2016-04-12 13:26:25 +00:00
mvukad
695e33b25b
Fix missing format when writing Algorithm-based objects
...
Added a writeFormat() method to Algorithm which must be called by the
write() method of derived classes.
2016-04-07 13:49:42 -07:00
Evan Heidtmann
0712bccf52
Fix epsilon comparison when splitting
2016-03-28 14:16:32 -07:00
Evgeny Agafonchikov
91bd7df8c1
Fixing invalid opencv_test_ml calls
2015-03-20 17:49:03 +03:00
Maksim Shabunin
79e8f0680c
Updated ml module interfaces and documentation
2015-02-17 11:46:14 +03:00
Maksim Shabunin
d004ee58c5
Support loading old models in ML module
...
- added test for loading legacy files
- added version to new written models
- fixed loading of several fields in some models
- added generation of new fields from old data
2014-12-31 12:16:25 +03:00
Vadim Pisarevsky
222f8a3d5e
hopefully fixed test failure on Linux
2014-08-04 01:16:45 +04:00
Vadim Pisarevsky
24b01a8e4f
continuing to debug boost and fix MSVC compile errors
2014-08-03 21:21:11 +04:00
Vadim Pisarevsky
98a1181240
fixed the condition
2014-08-03 13:15:43 +04:00
Vadim Pisarevsky
79b593d8d8
more fixes and more debugging code
2014-08-03 13:08:03 +04:00
Vadim Pisarevsky
eeb786fcfd
fixed compile warnings from MSVC; fixed warnings in Python bindings; added some debugging code
2014-08-03 12:46:28 +04:00
Vadim Pisarevsky
2520e335d1
removed many extra whitespaces; fixed 1 warning
2014-08-03 03:08:25 +04:00
Vadim Pisarevsky
c20ff6ce19
made everything compile and even run somehow
2014-08-03 01:41:09 +04:00
Vadim Pisarevsky
ba3783d205
initial commit; ml has been refactored; it compiles and the tests run well; some other modules, apps and samples do not compile; to be fixed
2014-07-29 23:54:23 +04:00
Roman Donchenko
3d7a457c97
Merge remote-tracking branch 'origin/2.4' into merge-2.4
...
Conflicts:
doc/tutorials/introduction/linux_install/linux_install.rst
modules/core/doc/operations_on_arrays.rst
modules/core/include/opencv2/core/core.hpp
modules/core/src/system.cpp
modules/gpu/src/cuda/resize.cu
modules/imgproc/doc/miscellaneous_transformations.rst
modules/imgproc/doc/structural_analysis_and_shape_descriptors.rst
modules/video/src/bgfg_gaussmix2.cpp
2014-05-19 18:39:20 +04:00
Vladislav Vinogradov
7e2f7f45d7
fix bug #3690
...
removed invalid condition, it is always false
2014-05-14 10:47:28 +04:00
Roman Donchenko
345bc633cc
Boring changes - ml.
2013-09-05 18:26:44 +04:00
Maria Dimashova
989be02562
fixed cpp wrappers of ML tree-based models
2013-08-23 18:13:10 +04:00
Andrey Kamaev
715fa3303e
Move cv::Mat out of core.hpp
2013-04-01 15:24:34 +04:00
Andrey Kamaev
cc6bdfb045
Remove inline sorting algorithms from core headers
2013-03-28 17:22:50 +04:00
Andrey Kamaev
2a6fb2867e
Remove all using directives for STL namespace and members
...
Made all STL usages explicit to be able automatically find all usages of
particular class or function.
2013-02-25 15:04:17 +04:00
LeonidBeynenson
87b0126e0d
Fixed dummy warning.
2013-02-01 16:16:43 +04:00
LeonidBeynenson
013d54c230
Changed types of some variables from int64 back to int.
...
Also corrected some indexes to be size_t.
2013-02-01 14:41:14 +04:00
LeonidBeynenson
6de422701a
Made changes to allow ml module to work with big data.
2013-01-31 19:37:20 +04:00
Vadim Pisarevsky
633a8bfacc
fixed many warnings (modified pull request 13)
2012-08-28 18:15:14 +04:00
Andrey Kamaev
f2d3b9b4a1
Warning fixes continued
2012-06-09 15:00:04 +00:00
Maria Dimashova
7f2cda6c8c
fix the ticket #1234
2012-03-30 15:04:51 +00:00
Maria Dimashova
48ea65e69c
fixed traincascade for ordered features
2011-12-22 11:19:27 +00:00
Ilya Lysenkov
2c958b2598
Trunk: moved contructors implementations from .hpp to .cpp
2011-06-24 12:25:52 +00:00
Vadim Pisarevsky
65a7f13af3
replaced alloca() (a.k.a. cvStackAlloc) with AutoBuffer or vector() everywhere. cvStackAlloc() is still defined, but we do not need alloca() anymore to compile and run OpenCV ( fixes #889 and may be some others)
2011-02-18 10:29:57 +00:00
Maria Dimashova
c104cdce96
made random generators of MLL classes depended on default rng (theRNG) ( #205 ).
2010-11-29 14:04:08 +00:00
Maria Dimashova
dd14dc5de3
fixed #517 ; uncommented ertrees test and moved it to black llist
2010-11-29 09:34:06 +00:00
Vadim Pisarevsky
59e2afe4d2
fixed the ordering of parameters in PyArg_ParseTupleAndKeywords, added correct Ptr<CvDTreeSplit>::delete_obj() (ticket #406 )
2010-11-25 23:16:32 +00:00
Vadim Pisarevsky
5b6a755719
almost finished Python wrappers
2010-11-02 17:58:22 +00:00
Maria Dimashova
0c771221a3
fixed problem with surrogate splits in decision trees training
2010-09-22 06:55:51 +00:00
Maria Dimashova
7d94f256e6
fixed CvDTree and CvForestTree find_best_split() methods
2010-09-10 15:44:46 +00:00
Maria Dimashova
c15934dd2b
modified default var_type values
2010-06-24 08:34:47 +00:00
Maria Dimashova
122a1c2bff
fixed case of var_type==0 (ticket 397)
2010-06-23 17:00:12 +00:00
Vadim Pisarevsky
127d6649a1
"atomic bomb" commit. Reorganized OpenCV directory structure
2010-05-11 17:44:00 +00:00
