ImageHandsOn.cntk
# CNTK Configuration File for training a simple CIFAR-10 convnet.
# During the hands-on tutorial, this will be fleshed out into a ResNet-20 model.
command = TrainConvNet:Eval
makeMode = false ; traceLevel = 0 ; deviceId = "auto"
rootDir = "." ; dataDir = "$rootDir$" ; modelDir = "$rootDir$/Models"
modelPath = "$modelDir$/cifar10.cmf"
# Training action for a convolutional network
TrainConvNet = {
action = "train"
BrainScriptNetworkBuilder = {
imageShape = 32:32:3
labelDim = 10
model (features) = {
featNorm = features - 128
l1 = ConvolutionalLayer {32, (5:5), pad=true, activation=ReLU, initValueScale=0.1557/256} (featNorm)
p1 = MaxPoolingLayer {(3:3), stride=(2:2)} (l1)
l2 = ConvolutionalLayer {32, (5:5), pad=true, activation=ReLU, initValueScale=0.2} (p1)
p2 = MaxPoolingLayer {(3:3), stride=(2:2)} (l2)
l3 = ConvolutionalLayer {64, (5:5), pad=true, activation=ReLU, initValueScale=0.2} (p2)
p3 = MaxPoolingLayer {(3:3), stride=(2:2)} (l3)
d1 = DenseLayer {64, activation=ReLU, initValueScale=1.697} (p3)
z = LinearLayer {10, initValueScale=0.212} (d1)
}.z
# inputs
features = Input {imageShape}
labels = Input {labelDim}
# apply model to features
z = model (features)
# connect to system
ce = CrossEntropyWithSoftmax (labels, z)
errs = ClassificationError (labels, z)
featureNodes = (features)
labelNodes = (labels)
criterionNodes = (ce)
evaluationNodes = (errs)
outputNodes = (z)
}
SGD = {
epochSize = 50000
maxEpochs = 10 ; minibatchSize = 64
learningRatesPerSample = 0.00015625*7:0.000046875*10:0.000015625
momentumAsTimeConstant = 600*20:6400
L2RegWeight = 0.03
firstMBsToShowResult = 10 ; numMBsToShowResult = 100
}
reader = {
verbosity = 0 ; randomize = true
deserializers = ({
type = "ImageDeserializer" ; module = "ImageReader"
file = "$dataDir$/cifar-10-batches-py/train_map.txt"
input = {
features = { transforms = (
{ type = "Crop" ; cropType = "random" ; cropRatio = 0.8 ; jitterType = "uniRatio" } :
{ type = "Scale" ; width = 32 ; height = 32 ; channels = 3 ; interpolations = "linear" } :
{ type = "Transpose" }
)}
labels = { labelDim = 10 }
}
})
}
}
# Eval action
Eval = {
action = "eval"
minibatchSize = 16
evalNodeNames = errs
reader = {
verbosity = 0 ; randomize = true
deserializers = ({
type = "ImageDeserializer" ; module = "ImageReader"
file = "$dataDir$/cifar-10-batches-py/test_map.txt"
input = {
features = { transforms = (
{ type = "Scale" ; width = 32 ; height = 32 ; channels = 3 ; interpolations = "linear" } :
{ type = "Transpose" }
)}
labels = { labelDim = 10 }
}
})
}
}