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Add gradient for ResizeBilinear (#239)

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Christian Berentsen 2019-04-08 19:43:17 +02:00 committed by fkm3
parent 3cfd96ef08
commit 96f1c88327
2 changed files with 30 additions and 1 deletions
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12
tensorflow-ops/src/TensorFlow/Gradient.hs
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@ -817,6 +817,17 @@ opGrad "Tile" _ [toT -> x, toT -> multiples] [dz] =
axes = CoreOps.range 0 (CoreOps.size splitShape) (2 :: Tensor Build Int32)
reshapedDz = CoreOps.reshape dz splitShape
opGrad "ResizeBilinear" nodeDef [toT -> x, _] [dz] =
[ Just $ CoreOps.resizeBilinearGrad'
(opAttr "align_corners" .~ align)
(CoreOps.cast dz)
x
, Nothing
]
where
align = lookupAttr nodeDef "align_corners" :: Bool
opGrad "ZerosLike" _ _ _ = [Nothing]
opGrad "Fill" _ _ [dz] = [Nothing, Just $ sum dz rx]
where
@ -894,6 +905,7 @@ numOutputs o =
"Sum" -> 1
"Tanh" -> 1
"Tile" -> 1
"ResizeBilinear" -> 1
"Transpose" -> 1
"TruncatedNormal" -> 1
"VarHandleOp" -> 1

19
tensorflow-ops/tests/GradientTest.hs
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@ -32,7 +32,7 @@ import Control.Monad(forM_, replicateM, zipWithM)
import Control.Monad.IO.Class (liftIO)
import qualified TensorFlow.Core as TF
import qualified TensorFlow.GenOps.Core as TF (conv2DBackpropInput', max, maximum, tile, pad, batchToSpaceND, spaceToBatchND, squeeze, sqrt, slice, shape)
import qualified TensorFlow.GenOps.Core as TF (conv2DBackpropInput', max, maximum, resizeBilinear', tile, pad, batchToSpaceND, spaceToBatchND, squeeze, sqrt, slice, shape)
import qualified TensorFlow.Gradient as TF
import qualified TensorFlow.Ops as TF hiding (zeroInitializedVariable, shape)
import qualified TensorFlow.Output as TF
@ -429,6 +429,22 @@ testTile2DGrad = testCase "testTileGrad2D" $ do
shapeX @=? (shapeDX :: V.Vector Int32)
V.fromList [6, 6, 6, 6, 6, 6::Float] @=? (dx :: V.Vector Float)
testResizeBilinearGrad :: Test
testResizeBilinearGrad = testCase "testResizeBilinearGrad" $ do
(dx, shapeDX, shapeX) <- TF.runSession $ do
let shape = TF.vector [1, 2, 2, 1 :: Int32]
x <- TF.render $ TF.fill shape (TF.scalar (1 :: Float))
let outSize = TF.vector [4, 4 :: Int32]
align = TF.opAttr "align_corners" .~ True
y = TF.resizeBilinear' align x outSize
[dx] <- TF.gradients y [x]
TF.run (dx, TF.shape dx, TF.shape x)
shapeX @=? (shapeDX :: V.Vector Int32)
let expect = V.fromList [4, 4, 4, 4 :: Float]
near = 0.00001 > (V.sum $ V.zipWith (-) expect (dx :: V.Vector Float))
near @=? True
matMulGradient :: Test
matMulGradient = testCase "matMulGradients" $ do
@ -553,6 +569,7 @@ main = defaultMain
, testFillGrad
, testTileGrad
, testTile2DGrad
, testResizeBilinearGrad
, matMulGradient
, matMulGradGrad
, matMulTransposeGradient (False, False)