mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-30 06:14:13 +08:00
jwittenbach
85 lines
2.2 KiB
Python
85 lines
2.2 KiB
Python
import os
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import numpy as np
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try:
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import skimage as si
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except Exception:
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si = None
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from numpy.testing import (
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assert_array_equal, assert_array_almost_equal, run_module_suite)
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from numpy.testing.decorators import skipif
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from tempfile import NamedTemporaryFile
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from .tifffile import imread, imsave
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np.random.seed(0)
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@skipif(si is None)
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def test_imread_uint16():
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expected = np.load(os.path.join(si.data_dir, 'chessboard_GRAY_U8.npy'))
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img = imread(os.path.join(si.data_dir, 'chessboard_GRAY_U16.tif'))
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assert img.dtype == np.uint16
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assert_array_almost_equal(img, expected)
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@skipif(si is None)
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def test_imread_uint16_big_endian():
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expected = np.load(os.path.join(si.data_dir, 'chessboard_GRAY_U8.npy'))
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img = imread(os.path.join(si.data_dir, 'chessboard_GRAY_U16B.tif'))
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assert img.dtype == np.uint16
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assert_array_almost_equal(img, expected)
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def test_extension():
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from .tifffile.tifffile import decode_packbits
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import types
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assert isinstance(decode_packbits, types.BuiltinFunctionType), type(decode_packbits)
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class TestSave:
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def roundtrip(self, dtype, x):
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# input: file name
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f = NamedTemporaryFile(suffix='.tif')
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fname = f.name
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f.close()
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imsave(fname, x)
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y = imread(fname)
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assert_array_equal(x, y)
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# input: open file object
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f = NamedTemporaryFile(suffix='.tif')
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imsave(f, x)
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f.seek(0)
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y = imread(f)
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assert_array_equal(x, y)
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f.close()
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#input: byte stream
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from io import BytesIO
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b = BytesIO()
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imsave(b, x)
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b.seek(0)
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y = imread(b)
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assert_array_equal(x, y)
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def test_imsave_roundtrip(self):
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for shape in [(10, 10), (10, 10, 3), (10, 10, 4)]:
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for dtype in (np.uint8, np.uint16, np.float32, np.int16,
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np.float64):
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x = np.random.rand(*shape)
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if not np.issubdtype(dtype, float):
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x = (x * np.iinfo(dtype).max).astype(dtype)
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else:
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x = x.astype(dtype)
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yield self.roundtrip, dtype, x
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if __name__ == "__main__":
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run_module_suite()
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