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⼒力力                     ⼤大          ⽬目
            ⼒力力              ⽤用
                                                     ⽤用           ⼒力力
                                                ⽤用


    1             M =3                  1             M =9
t                                   t

    0                                   0



−1                                  −1


        0          x     1                  0             x   1
⼿手


                      ⼒力力   ⾼高
           ⽤用
         y=1
          y=0
             y = −1




                                 ⼯工        ⼤大
margin
⼿手


⾏行行


                ⾼高   ⽣生


      ⽣生
     ⼒力力
         
                         
  
⼀一
          ⽅方        ⾏行行


                          ⾼高       ⽣生


                                


                          
                        


       
⼀一
   ⽣生                 
            
                 
       
⼀一
   ⽣生                                                  
                                             
                                                  
       
A General Boosting Procedure

 1. Initialize
 2. From t = 1 to T. (T:                             )

      -          : Learn a weak learner
      -                         : Calculate error
      -                                :    Create new distribution
 3.                                   : Combine weak learners
⼀一
   ⽣生                                                  
                                             
                                                  
       
A General Boosting Procedure

 1. Initialize
 2. From t = 1 to T. (T:                             )

      -          : Learn a weak learner
      -                         : Calculate error
      -                                :    Create new distribution
 3.                                   : Combine weak learners
             ⼒力力


AdaBoost Algorithm
 Input:
 1.                 : Calculate initial distribution
 2. From t = 1 to T.
      -                ,                               :Learn and Calculate Error
      - if         then break
      - Calculate Weight and next distribution


 Outputs:
             ⼒力力


AdaBoost Algorithm
 Input:
 1.                 : Calculate initial distribution
 2. From t = 1 to T.
      -                ,                               :Learn and Calculate Error
      - if         then break
      - Calculate Weight and next distribution


 Outputs:
⽣生   ⾏行行
⽣生   ⾏行行
     ⼩小
     ⼩小
     ⼩小
AdaBoost Algorithm
 Input:
 1.                 : Calculate initial distribution
 2. From t = 1 to T.
      -                ,                               :Learn and Calculate Error
      - if         then break
      - Calculate Weight and next distribution


 Outputs:
  



  




  ⺟母
              ⺟母
            ⾮非
              




          



             ⼤大
A General Boosting Procedure

 1. Initialize
 2. From t = 1 to T. (T:                            )

      -          : Learn a weak learner
      -                         : Calculate error
      -                                :   Create new distribution
 3.                                   : Combine weak learners

                                                        ⽅方
                                                             ⼩小
⼩小   ⼿手   ⾏行行




      ⼩小        ⼩小


⼒力力
                     ⼩小
AdaBoost Algorithm
 Input:
 1.                 : Calculate initial distribution
 2. From t = 1 to T.
      -                ,                               :Learn and Calculate Error
      - if         then break
      - Calculate Weight and next distribution


 Outputs:
⽤用
               ⽤用
⾔言
          ⽊木
     ⼦子



               ⼦子
⾏行行      ⾔言
      ⼒力力     ⼒力力




      ⼊入
               
                      
                                   



                          ⼊入
                                             
                                              
      
                                 
  
                        
                  
                              
⼒力力               ⽌止




                       ⼊入
⽰示   ⽤用
                    ⽰示




                    ⼒力力
⽰示
     ⼈人
⽅方


      ⼿手
⾏行行


                     ⾼高   ⽣生


           ⽣生
⼿手
⽊木
      




              ⽊木 ⽂文
         ⽣生         
                   
    



⼈人


     ⾒見見               ⼒力力
                ⾃自


           ⾃自
⼿手




            ⼿手
     ⾯面⽩白
⽂文
          ⼩小




     ⼈人


               ⾦金金   ⽵竹
 ⽥田 ⾦金金

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Ada boost

  • 1.
  • 2.
  • 3. ⼒力力 ⼤大 ⽬目 ⼒力力 ⽤用 ⽤用 ⼒力力 ⽤用 1 M =3 1 M =9 t t 0 0 −1 −1 0 x 1 0 x 1
  • 4. ⼿手 ⼒力力 ⾼高 ⽤用 y=1 y=0 y = −1 ⼯工 ⼤大 margin
  • 5. ⼿手 ⾏行行 ⾼高 ⽣生 ⽣生
  • 6.    ⼒力力            
  • 7. ⼀一 ⽅方 ⾏行行 ⾼高 ⽣生                       
  • 8. ⼀一    ⽣生                     
  • 9. ⼀一    ⽣生                      A General Boosting Procedure 1. Initialize 2. From t = 1 to T. (T: ) - : Learn a weak learner - : Calculate error - : Create new distribution 3. : Combine weak learners
  • 10. ⼀一    ⽣生                      A General Boosting Procedure 1. Initialize 2. From t = 1 to T. (T: ) - : Learn a weak learner - : Calculate error - : Create new distribution 3. : Combine weak learners
  • 11.      ⼒力力 AdaBoost Algorithm Input: 1. : Calculate initial distribution 2. From t = 1 to T. - , :Learn and Calculate Error - if then break - Calculate Weight and next distribution Outputs:
  • 12.      ⼒力力 AdaBoost Algorithm Input: 1. : Calculate initial distribution 2. From t = 1 to T. - , :Learn and Calculate Error - if then break - Calculate Weight and next distribution Outputs:
  • 13. ⽣生 ⾏行行
  • 14. ⽣生 ⾏行行
  • 15.    ⼩小
  • 16.    ⼩小
  • 17.    ⼩小
  • 18. AdaBoost Algorithm Input: 1. : Calculate initial distribution 2. From t = 1 to T. - , :Learn and Calculate Error - if then break - Calculate Weight and next distribution Outputs:
  • 19.       ⺟母 ⺟母 ⾮非
  • 21. A General Boosting Procedure 1. Initialize 2. From t = 1 to T. (T: ) - : Learn a weak learner - : Calculate error - : Create new distribution 3. : Combine weak learners       ⽅方 ⼩小
  • 22. ⼩小 ⼿手 ⾏行行 ⼩小 ⼩小 ⼒力力 ⼩小
  • 23. AdaBoost Algorithm Input: 1. : Calculate initial distribution 2. From t = 1 to T. - , :Learn and Calculate Error - if then break - Calculate Weight and next distribution Outputs:
  • 24. ⽤用 ⽤用 ⾔言 ⽊木 ⼦子 ⼦子
  • 25. ⾏行行 ⾔言 ⼒力力 ⼒力力 ⼊入
  • 26.                      ⼊入                            
  • 27.                ⼒力力 ⽌止 ⼊入
  • 28. ⽰示 ⽤用 ⽰示 ⼒力力 ⽰示 ⼈人
  • 29. ⽅方 ⼿手 ⾏行行 ⾼高 ⽣生 ⽣生
  • 31. ⽊木        ⽊木 ⽂文 ⽣生       
  • 32.                  
  • 33.      ⼈人 ⾒見見 ⼒力力 ⾃自 ⾃自
  • 34. ⼿手 ⼿手 ⾯面⽩白
  • 35. ⽂文 ⼩小 ⼈人 ⾦金金 ⽵竹 ⽥田 ⾦金金