Multi-band Blending

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Multi-band Blending
from:http://aboutdada.com/?p=29
Posted on November 26、2014
Multi-Band Blending         (Laplacian Image)     (Gaussian Image)。
        :
1.    Alignment            :subA、subB。
2.  subA subB Gaussian blur,  GA,GB。
3.   downsampling    GA GB Gaussian Pyramid。(PS.Gaussian Pyramid  G0    blur   )
4.  GA GB  pyramid  EXPAND SUBTRACT  Laplacian Pyramid,LA LB。
Ln=Gn−EXPAND(Gn−1)
[Laplacian Pyramid]
 
              [Mulitband Pyramid] 
5.   Laplacian Pyramid LS, LS      LA Laplacian, LS     LB Laplacian。 
6. Pyramid Reconstruction。  LS GS ,   Pyramid              。
Gn=Ln+EXPAND(Gn−1+Ln−1)
 
7.
Reconstruction Processは、一番下の階から重ねて、各階のExpandが上がったら、Laplacan Imageを重畳して、Expandを0階まで上げます。[Reconstruction Illustration]
8.下図は9階を使用しています
Multi-band Blendingの結果

[Pyramind Reconstruction Result]

     :
          ,   apple,orange guave。
  paper  apple orange,guave        ,
         ,               。
Source:
 
1. apple + guava
 [LEFT:Alpha Blending; RIGHT:Multi-Band Blending]

2. apple + orange
 
[LEFT:Alpha Blending; RIGHT:Multi-Band Blending]

      ,Multi-Band Blending        ,
                   。       Multi-Band    ,
      、Pyramid layer  Gaussian size            。  
 
reference :
http://cs.haifa.ac.il/hagit/courses/CP/Lectures/CP07_StitchingX 4.pdf
コンピュータ Vision:Algorithms and Appliations(Richard Szliski)
イメージ from: http://pages.cs.wisc.edu/~csverma/CS 766_09/ImageMosaic/imagmosaic.
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