1 files changed, 0 insertions, 150 deletions

diff --git a/packages/base/src/Numeric/LinearAlgebra/Util/Convolution.hs b/packages/base/src/Numeric/LinearAlgebra/Util/Convolution.hs
deleted file mode 100644
index c9e75de..0000000
--- a/packages/base/src/Numeric/LinearAlgebra/Util/Convolution.hs
+++ /dev/null
@@ -1,150 +0,0 @@
-{-# LANGUAGE FlexibleContexts #-}
------------------------------------------------------------------------------
-{- |
-Module      :  Numeric.LinearAlgebra.Util.Convolution
-Copyright   :  (c) Alberto Ruiz 2012
-License     :  BSD3
-Maintainer  :  Alberto Ruiz
-Stability   :  provisional
-
--}
------------------------------------------------------------------------------
-{-# OPTIONS_HADDOCK hide #-}
-
-module Numeric.LinearAlgebra.Util.Convolution(
-   corr, conv, corrMin,
-   corr2, conv2, separable
-) where
-
-import qualified Data.Vector.Storable as SV
-import Data.Packed.Numeric
-
-
-vectSS :: Element t => Int -> Vector t -> Matrix t
-vectSS n v = fromRows [ subVector k n v | k <- [0 .. dim v - n] ]
-
-
-corr
-  :: (Container Vector t, Product t)
-    => Vector t -- ^ kernel
-    -> Vector t -- ^ source
-    -> Vector t
-{- ^ correlation
-
->>> corr (fromList[1,2,3]) (fromList [1..10])
-fromList [14.0,20.0,26.0,32.0,38.0,44.0,50.0,56.0]
-
--}
-corr ker v
-    | dim ker == 0 = konst 0 (dim v)
-    | dim ker <= dim v = vectSS (dim ker) v <> ker
-    | otherwise = error $ "corr: dim kernel ("++show (dim ker)++") > dim vector ("++show (dim v)++")"
-
-
-conv :: (Container Vector t, Product t, Num t) => Vector t -> Vector t -> Vector t
-{- ^ convolution ('corr' with reversed kernel and padded input, equivalent to polynomial product)
-
->>> conv (fromList[1,1]) (fromList [-1,1])
-fromList [-1.0,0.0,1.0]
-
--}
-conv ker v
-    | dim ker == 0 = konst 0 (dim v)
-    | otherwise = corr ker' v'
-  where
-    ker' = SV.reverse ker
-    v' = vjoin [z,v,z]
-    z = konst 0 (dim ker -1)
-
-corrMin :: (Container Vector t, RealElement t, Product t)
-        => Vector t
-        -> Vector t
-        -> Vector t
--- ^ similar to 'corr', using 'min' instead of (*)
-corrMin ker v
-    | dim ker == 0 = error "corrMin: empty kernel"
-    | otherwise    = minEvery ss (asRow ker) <> ones
-  where
-    minEvery a b = cond a b a a b
-    ss = vectSS (dim ker) v
-    ones = konst 1 (dim ker)
-
-
-
-matSS :: Element t => Int -> Matrix t -> [Matrix t]
-matSS dr m = map (reshape c) [ subVector (k*c) n v | k <- [0 .. r - dr] ]
-  where
-    v = flatten m
-    c = cols m
-    r = rows m
-    n = dr*c
-
-
-{- | 2D correlation (without padding)
-
->>> disp 5 $ corr2 (konst 1 (3,3)) (ident 10 :: Matrix Double)
-8x8
-3  2  1  0  0  0  0  0
-2  3  2  1  0  0  0  0
-1  2  3  2  1  0  0  0
-0  1  2  3  2  1  0  0
-0  0  1  2  3  2  1  0
-0  0  0  1  2  3  2  1
-0  0  0  0  1  2  3  2
-0  0  0  0  0  1  2  3
-
--}
-corr2 :: Product a => Matrix a -> Matrix a -> Matrix a
-corr2 ker mat = dims
-              . concatMap (map (udot ker' . flatten) . matSS c . trans)
-              . matSS r $ mat
-  where
-    r = rows ker
-    c = cols ker
-    ker' = flatten (trans ker)
-    rr = rows mat - r + 1
-    rc = cols mat - c + 1
-    dims | rr > 0 && rc > 0 = (rr >< rc)
-         | otherwise = error $ "corr2: dim kernel ("++sz ker++") > dim matrix ("++sz mat++")"
-    sz m = show (rows m)++"x"++show (cols m)
--- TODO check empty kernel
-
-{- | 2D convolution
-
->>> disp 5 $ conv2 (konst 1 (3,3)) (ident 10 :: Matrix Double)
-12x12
-1  1  1  0  0  0  0  0  0  0  0  0
-1  2  2  1  0  0  0  0  0  0  0  0
-1  2  3  2  1  0  0  0  0  0  0  0
-0  1  2  3  2  1  0  0  0  0  0  0
-0  0  1  2  3  2  1  0  0  0  0  0
-0  0  0  1  2  3  2  1  0  0  0  0
-0  0  0  0  1  2  3  2  1  0  0  0
-0  0  0  0  0  1  2  3  2  1  0  0
-0  0  0  0  0  0  1  2  3  2  1  0
-0  0  0  0  0  0  0  1  2  3  2  1
-0  0  0  0  0  0  0  0  1  2  2  1
-0  0  0  0  0  0  0  0  0  1  1  1
-
--}
-conv2
-    :: (Num (Matrix a), Product a, Container Vector a)
-    => Matrix a -- ^ kernel
-    -> Matrix a -> Matrix a
-conv2 k m
-    | empty     = konst 0 (rows m + r -1, cols m + c -1)
-    | otherwise = corr2 (fliprl . flipud $ k) padded
-  where
-    padded = fromBlocks [[z,0,0]
-                        ,[0,m,0]
-                        ,[0,0,z]]
-    r = rows k
-    c = cols k
-    z = konst 0 (r-1,c-1)
-    empty = r == 0 || c == 0
-
-
-separable :: Element t => (Vector t -> Vector t) -> Matrix t -> Matrix t
--- ^ matrix computation implemented as separated vector operations by rows and columns.
-separable f = fromColumns . map f . toColumns . fromRows . map f . toRows
-