def testSC(self):
"""test that datasets are unchanged after various comression/decompressions"""
obt_np = compression.decByteOffset_numpy(compression.compByteOffset_numpy(self.ds))
self.assertEqual(abs(self.ds - obt_np).max(), 0.0, "numpy algo")
obt_cy = compression.decByteOffset_cython(compression.compByteOffset_numpy(self.ds))
self.assertEqual(abs(self.ds - obt_cy).max(), 0.0, "cython algo")
obt_cy2 = compression.decByteOffset_cython(compression.compByteOffset_numpy(self.ds), self.ds.size)
self.assertEqual(abs(self.ds - obt_cy2).max(), 0.0, "cython algo_orig")
def testSC(self):
"""test that datasets are unchanged after various compression/decompressions"""
obt_np = compression.decByteOffset_numpy(compression.compByteOffset_numpy(self.ds))
self.assertEqual(abs(self.ds - obt_np).max(), 0.0, "numpy-numpy algo")
obt_cy = compression.decByteOffset_cython(compression.compByteOffset_numpy(self.ds))
self.assertEqual(abs(self.ds - obt_cy).max(), 0.0, "cython-numpy algo")
obt_cy2 = compression.decByteOffset_cython(compression.compByteOffset_numpy(self.ds), self.ds.size)
self.assertEqual(abs(self.ds - obt_cy2).max(), 0.0, "cython2-numpy algo_orig")
obt_np = compression.decByteOffset_numpy(compression.compByteOffset_cython(self.ds))
self.assertEqual(abs(self.ds - obt_np).max(), 0.0, "numpy-numpy algo")
obt_cy = compression.decByteOffset_cython(compression.compByteOffset_cython(self.ds))
self.assertEqual(abs(self.ds - obt_cy).max(), 0.0, "cython-numpy algo")
obt_cy2 = compression.decByteOffset_cython(compression.compByteOffset_cython(self.ds), self.ds.size)
self.assertEqual(abs(self.ds - obt_cy2).max(), 0.0, "cython2-numpy algo_orig")
def test_byte_offset(self):
""" check byte offset algorithm"""
cbf = fabio.open(self.cbf_filename)
starter = b"\x0c\x1a\x04\xd5"
cbs = cbf.cbs
startPos = cbs.find(starter) + 4
data = cbs[startPos: startPos + int(cbf.header["X-Binary-Size"])]
startTime = time.time()
numpyRes = decByteOffset_numpy(data, size=cbf.dim1 * cbf.dim2)
tNumpy = time.time() - startTime
logger.info("Timing for Numpy method : %.3fs" % tNumpy)
startTime = time.time()
cythonRes = decByteOffset_cython(stream=data, size=cbf.dim1 * cbf.dim2)
tCython = time.time() - startTime
delta = abs(numpyRes - cythonRes).max()
self.assertAlmostEqual(0, delta)
logger.info("Timing for Cython method : %.3fs, max delta= %s" % (tCython, delta))
def test_byte_offset(self):
""" check byte offset algorithm"""
cbf = fabio.open(self.cbf_filename)
starter = b"\x0c\x1a\x04\xd5"
cbs = cbf.cbs
startPos = cbs.find(starter) + 4
data = cbs[startPos: startPos + int(cbf.header["X-Binary-Size"])]
startTime = time.time()
numpyRes = decByteOffset_numpy(data, size=cbf.dim1 * cbf.dim2)
tNumpy = time.time() - startTime
logger.info("Timing for Numpy method : %.3fs" % tNumpy)
startTime = time.time()
cythonRes = decByteOffset_cython(stream=data, size=cbf.dim1 * cbf.dim2)
tCython = time.time() - startTime
delta = abs(numpyRes - cythonRes).max()
self.assertAlmostEqual(0, delta)
logger.info("Timing for Cython method : %.3fs, max delta= %s" % (tCython, delta))
import numpy from fabio import compression test = numpy.array([0, 1, 2, 127, 0, 1, 2, 128, 0, 1, 2, 32767, 0, 1, 2, 32768, 0, 1, 2, 2147483647, 0, 1, 2, 2147483648, 0, 1, 2, 128, 129, 130, 32767, 32768, 128, 129, 130, 32768, 2147483647, 2147483648]) b = compression.compByteOffset_numpy(test) print(compression.decByteOffset_cython(b) - test) print(compression.decByteOffset_numpy(b) - test)
import numpy
from fabio import compression
test = numpy.array([
0, 1, 2, 127, 0, 1, 2, 128, 0, 1, 2, 32767, 0, 1, 2, 32768, 0, 1, 2,
2147483647, 0, 1, 2, 2147483648, 0, 1, 2, 128, 129, 130, 32767, 32768, 128,
129, 130, 32768, 2147483647, 2147483648
])
b = compression.compByteOffset_numpy(test)
print(compression.decByteOffset_cython(b) - test)
print(compression.decByteOffset_numpy(b) - test)
