moved calculation of kernel norm out of inner-loop function
moved calculation of kernel norm out of inner-loop function

ThomasWalter/vigra,ThomasWalter/vigra,cbecker/vigra,xiwei-zhang/vigra,cha007/vigra,mmuellner/vigra,mmuellner/vigra,ThomasWalter/vigra,cha007/vigra,stuarteberg/vigra,xiwei-zhang/vigra,stuarteberg/vigra,dstoe/vigra,stuarteberg/vigra,cha007/vigra,kod3r/vigra,xiwei-zhang/vigra,mmuellner/vigra,martinsch/vigra,cha007/vigra,cbecker/vigra,cha007/vigra,psteinb/vigra,capturePointer/vigra,dagophil/vigra,cbecker/vigra,psteinb/vigra,psteinb/vigra,dagophil/vigra,timoMa/vigra,DaveRichmond-/vigra,psteinb/vigra,capturePointer/vigra,martinsch/vigra,martinsch/vigra,xiwei-zhang/vigra,martinsch/vigra,funkey/vigra,funkey/vigra,stuarteberg/vigra,ThomasWalter/vigra,hmeine/vigra,timoMa/vigra,kod3r/vigra,kod3r/vigra,timoMa/vigra,kod3r/vigra,stuarteberg/vigra,funkey/vigra,mmuellner/vigra,DaveRichmond-/vigra,stuarteberg/vigra,xiwei-zhang/vigra,cbecker/vigra,dstoe/vigra,kod3r/vigra,martinsch/vigra,kod3r/vigra,dstoe/vigra,mmuellner/vigra,funkey/vigra,dagophil/vigra,psteinb/vigra,dstoe/vigra,dstoe/vigra,funkey/vigra,hmeine/vigra,cha007/vigra,ThomasWalter/vigra,xiwei-zhang/vigra,timoMa/vigra,psteinb/vigra,capturePointer/vigra,cbecker/vigra,hmeine/vigra,dstoe/vigra,DaveRichmond-/vigra,DaveRichmond-/vigra,timoMa/vigra,timoMa/vigra,DaveRichmond-/vigra,timoMa/vigra,DaveRichmond-/vigra,capturePointer/vigra,hmeine/vigra,ThomasWalter/vigra,dagophil/vigra,cbecker/vigra,funkey/vigra,mmuellner/vigra,cha007/vigra,xiwei-zhang/vigra,hmeine/vigra,capturePointer/vigra,DaveRichmond-/vigra,capturePointer/vigra,dagophil/vigra,dagophil/vigra,martinsch/vigra,kod3r/vigra,hmeine/vigra,stuarteberg/vigra,mmuellner/vigra,capturePointer/vigra,dagophil/vigra,hmeine/vigra,dstoe/vigra,funkey/vigra,psteinb/vigra,ThomasWalter/vigra