DPM Deformable Part Models release5新源码出来了

DPM变形部件模型v5更新,引入弱标签结构SVM和人物语法模型,优化了训练速度,并增强了特征金字塔的支持。此外,还增加了可学习的比例先验参数,改善了配置系统,并修复了一些内存使用上的错误。

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DPM Deformable Part Models release5

新代码出来了

 

What's changed since voc-release4?

voc-release5

---

The main highlights in this release:

 

* Weak-label structural SVM (wl-ssvm)

         TheLearning code has been generalized to support both lsvm and

         wl-ssvm.By default lsvm is used for training mixture models

         andwl-ssvm is used for training the person grammar model from [1].

 

* Person grammar model [1]

         Theperson grammar model from [1] is implemented in the person_grammar

         directory.

 

* Optimization improvements

         Thestochastic subgradient descent solver (learn.cc) has been replaced

         byL-BFGS (using Mark Schmidt's minConf package). The learning and

         featurevector cache code has been completely rewritten from scratch.

         Notably,the feature vector cache is now stored in memory and not as

         alarge file on disk. The memory requirements are slightly higher than

         before,but your disk will thank you.

 

* Code cleanup, reorganization, and speedimprovements

         Thegrammar API has been simplified and streamlined. The code has been

         organizedinto subsystems. Training models is faster. For reference,

         aPASCAL VOC 2007 bicycle model can be trained in 2 hours on a 4-year-old

         quad-coremachine (using 'matlabpool open 8').

 

* Scale prior

         Grammarproductions now have learnable "scale prior" parameters that

         helpcalibrate detection scores at different scales. In conjunction with

         this,the feature pyramid code supports adding an extra octave of HOG

         featurescomputed on 2x2 pixel cells (off by default).

        

* Bug fixes

         Severalbug from voc-release4.01 (mostly involving memory usage) have

         beenfixed.

 

* New configuration system

         Theglobals.m configuration file has been replaced by voc_config.m.

         Thispermits overriding configurations by setting a global variable.

         Suchconfiguration overriding makes it easy to test different config

         optionson different machines from the same code directory

 

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