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45 Commits

Author SHA1 Message Date
Alexander Alekhin
b09a4a98d4 opencv: Use cv::AutoBuffer<>::data() 2018-07-04 19:11:29 +03:00
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