def test_splitsAndPix(self):
def genSlicesForPix(pix, size):
slices = []
st = 0
while st < size:
en = min(st + pix, size)
slices.append(slice(st, en, 1))
st = en
return slices
def genSlicesForSplits(splits, size):
slices = []
blocksize = size / splits # integer division
blockrem = size % splits
st = 0
while st < size:
en = st + blocksize
if blockrem > 0:
en += 1
blockrem -= 1
en = min(en, size)
slices.append(slice(st, en, 1))
st = en
return slices
Params = namedtuple(
"Params",
"unitsPerDim units image padding expPix expSplits expSlices0")
PARAMS = \
[Params((5, 5, 1), "pix", MockImage((15, 15, 3), 2, "uint8"), 0, (5, 5, 1), None, genSlicesForPix(5, 15)),
Params((5, 5, 2), "pix", MockImage((7, 7, 3), 2, "uint8"), 0, (5, 5, 2), None, genSlicesForPix(5, 7)),
Params((2, 2, 2), "s", MockImage((7, 7, 3), 2, "uint8"), 0, None, (2, 2, 2), genSlicesForSplits(2, 7)),
Params((5, 5, 1), "pix", MockImage((15, 15, 3), 2, "uint8"), 2, (5, 5, 1), None, genSlicesForPix(5, 15)),
Params((5, 5, 2), "pix", MockImage((7, 7, 3), 2, "uint8"), 2, (5, 5, 2), None, genSlicesForPix(5, 7)),
Params((2, 2, 2), "s", MockImage((7, 7, 3), 2, "uint8"), 2, None, (2, 2, 2), genSlicesForSplits(2, 7))]
for params in PARAMS:
if params.padding:
strat = PaddedBlockingStrategy(params.unitsPerDim,
units=params.units,
padding=params.padding)
else:
strat = SimpleBlockingStrategy(params.unitsPerDim,
params.units)
strat.setSource(params.image)
if params.expPix:
assert_equals(tuple(params.expPix), tuple(strat._pixPerDim))
else:
assert_true(strat._pixPerDim is None)
if params.expSplits:
assert_equals(tuple(params.expSplits),
tuple(strat._splitsPerDim))
else:
assert_true(strat._splitsPerDim is None)
assert_equals(params.expSlices0, strat._slices[0])
def test_simpleBlockExtraction(self):
for params in TestBlockExtraction.PARAMS:
strategy = SimpleBlockingStrategy([1]*len(params.aryshape)) # dummy splits; not used here
n = reduce(lambda x, y: x*y, params.aryshape)
ary = arange(n, dtype='int16').reshape(params.aryshape)
key, val = strategy.extractBlockFromImage(ary, params.blockslices, params.timepoint, params.ntimepoints)
expectedSlices = [slice(params.timepoint, params.timepoint+1, 1)] + list(params.blockslices)
expectedAry = expand_dims(ary[params.blockslices], axis=0)
assert_equals(params.timepoint, key.temporalKey)
assert_equals(params.ntimepoints, key.origShape[0])
assert_equals(tuple(params.aryshape), tuple(key.origShape[1:]))
assert_equals(tuple(expectedSlices), tuple(key.imgSlices))
assert_true(array_equal(expectedAry, val))
def test_roundtripThroughBlocks(self):
strategy = SimpleBlockingStrategy((2, 2, 2), units="s")
self._run_tst_roundtripThroughBlocks(strategy)
def test_toSeriesWithSplitsAndPack(self):
strategy = SimpleBlockingStrategy((1, 2), units="s")
self._run_tst_toSeriesWithSplitsAndPack(strategy)
