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Add tests for working with uint16 greyscale TIFFs.

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This commit is contained in:
Bryant Mairs 2016-04-09 08:28:50 -07:00
parent d2a7de2c25
commit d6c9ac175e
2 changed files with 23 additions and 1 deletions
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Tests/images/uint16_greyscale.tif Normal file
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Tests/test_file_tiff.py
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@ -3,7 +3,7 @@ import logging
import struct
from helper import unittest, PillowTestCase, hopper, py3
import numpy as np
from PIL import Image, TiffImagePlugin
logger = logging.getLogger(__name__)
@ -450,6 +450,28 @@ class TestFileTiff(PillowTestCase):
# Should not raise UnicodeDecodeError or anything else
im.save(outfile)
def test_save_greyscale_uint16_tiff(self):
'''
Save uint16 data as a greyscale uint16 TIFF.
'''
data = np.full([200, 200], 65535, np.uint16)
im = Image.fromarray(data)
outfile = self.tempfile("temp.tif")
im.save(outfile)
def test_roundtrip_greyscale_uint16_tiff(self):
'''
Confirm that all data saved to a uint16 TIFF is preserved.
Note: This will fail if test_save_greyscale_uint16_tiff() fails.
'''
data = np.full([200, 200], 65535, np.uint16)
im = Image.fromarray(data)
outfile = self.tempfile("temp.tif")
im.save(outfile)
out_im = Image.open(outfile)
self.assert_image_equal(im, out_im)
if __name__ == '__main__':
unittest.main()