mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-26 09:56:17 +03:00
187 lines
6.6 KiB
Python
187 lines
6.6 KiB
Python
from __future__ import print_function
|
|
from helper import unittest, PillowTestCase, hopper
|
|
|
|
from PIL import Image
|
|
|
|
try:
|
|
import site
|
|
import numpy
|
|
except ImportError:
|
|
# Skip via setUp()
|
|
pass
|
|
|
|
TEST_IMAGE_SIZE = (10, 10)
|
|
|
|
class TestNumpy(PillowTestCase):
|
|
|
|
def setUp(self):
|
|
try:
|
|
import site
|
|
import numpy
|
|
except ImportError:
|
|
self.skipTest("ImportError")
|
|
|
|
def test_numpy_to_image(self):
|
|
|
|
def to_image(dtype, bands=1, boolean=0):
|
|
if bands == 1:
|
|
if boolean:
|
|
data = [0, 1] * 50
|
|
else:
|
|
data = list(range(100))
|
|
a = numpy.array(data, dtype=dtype)
|
|
a.shape = TEST_IMAGE_SIZE
|
|
i = Image.fromarray(a)
|
|
if list(i.getdata()) != data:
|
|
print("data mismatch for", dtype)
|
|
else:
|
|
data = list(range(100))
|
|
a = numpy.array([[x]*bands for x in data], dtype=dtype)
|
|
a.shape = TEST_IMAGE_SIZE[0], TEST_IMAGE_SIZE[1], bands
|
|
i = Image.fromarray(a)
|
|
if list(i.split()[0].getdata()) != list(range(100)):
|
|
print("data mismatch for", dtype)
|
|
# print dtype, list(i.getdata())
|
|
return i
|
|
|
|
# Check supported 1-bit integer formats
|
|
self.assertRaises(TypeError, lambda: to_image(numpy.bool))
|
|
self.assertRaises(TypeError, lambda: to_image(numpy.bool8))
|
|
|
|
# Check supported 8-bit integer formats
|
|
self.assert_image(to_image(numpy.uint8), "L", TEST_IMAGE_SIZE)
|
|
self.assert_image(to_image(numpy.uint8, 3), "RGB", TEST_IMAGE_SIZE)
|
|
self.assert_image(to_image(numpy.uint8, 4), "RGBA", TEST_IMAGE_SIZE)
|
|
self.assert_image(to_image(numpy.int8), "I", TEST_IMAGE_SIZE)
|
|
|
|
# Check non-fixed-size integer types
|
|
# These may fail, depending on the platform, since we have no native
|
|
# 64 bit int image types.
|
|
# self.assert_image(to_image(numpy.uint), "I", TEST_IMAGE_SIZE)
|
|
# self.assert_image(to_image(numpy.int), "I", TEST_IMAGE_SIZE)
|
|
|
|
# Check 16-bit integer formats
|
|
if Image._ENDIAN == '<':
|
|
self.assert_image(to_image(numpy.uint16), "I;16", TEST_IMAGE_SIZE)
|
|
else:
|
|
self.assert_image(to_image(numpy.uint16), "I;16B", TEST_IMAGE_SIZE)
|
|
|
|
self.assert_image(to_image(numpy.int16), "I", TEST_IMAGE_SIZE)
|
|
|
|
# Check 32-bit integer formats
|
|
self.assert_image(to_image(numpy.uint32), "I", TEST_IMAGE_SIZE)
|
|
self.assert_image(to_image(numpy.int32), "I", TEST_IMAGE_SIZE)
|
|
|
|
# Check 64-bit integer formats
|
|
self.assertRaises(TypeError, lambda: to_image(numpy.uint64))
|
|
self.assertRaises(TypeError, lambda: to_image(numpy.int64))
|
|
|
|
# Check floating-point formats
|
|
self.assert_image(to_image(numpy.float), "F", TEST_IMAGE_SIZE)
|
|
self.assertRaises(TypeError, lambda: to_image(numpy.float16))
|
|
self.assert_image(to_image(numpy.float32), "F", TEST_IMAGE_SIZE)
|
|
self.assert_image(to_image(numpy.float64), "F", TEST_IMAGE_SIZE)
|
|
|
|
self.assert_image(to_image(numpy.uint8, 2), "LA", (10, 10))
|
|
self.assert_image(to_image(numpy.uint8, 3), "RGB", (10, 10))
|
|
self.assert_image(to_image(numpy.uint8, 4), "RGBA", (10, 10))
|
|
|
|
# based on an erring example at
|
|
# http://stackoverflow.com/questions/10854903/what-is-causing-dimension-dependent-attributeerror-in-pil-fromarray-function
|
|
def test_3d_array(self):
|
|
size = (5, TEST_IMAGE_SIZE[0], TEST_IMAGE_SIZE[1])
|
|
a = numpy.ones(size, dtype=numpy.uint8)
|
|
self.assert_image(Image.fromarray(a[1, :, :]), "L", TEST_IMAGE_SIZE)
|
|
size = (TEST_IMAGE_SIZE[0], 5, TEST_IMAGE_SIZE[1])
|
|
a = numpy.ones(size, dtype=numpy.uint8)
|
|
self.assert_image(Image.fromarray(a[:, 1, :]), "L", TEST_IMAGE_SIZE)
|
|
size = (TEST_IMAGE_SIZE[0], TEST_IMAGE_SIZE[1], 5)
|
|
a = numpy.ones(size, dtype=numpy.uint8)
|
|
self.assert_image(Image.fromarray(a[:, :, 1]), "L", TEST_IMAGE_SIZE)
|
|
|
|
def _test_img_equals_nparray(self, img, np):
|
|
np_size = np.shape[1], np.shape[0]
|
|
self.assertEqual(img.size, np_size)
|
|
px = img.load()
|
|
for x in range(0, img.size[0], int(img.size[0]/10)):
|
|
for y in range(0, img.size[1], int(img.size[1]/10)):
|
|
self.assert_deep_equal(px[x, y], np[y, x])
|
|
|
|
def test_16bit(self):
|
|
img = Image.open('Tests/images/16bit.cropped.tif')
|
|
np_img = numpy.array(img)
|
|
self._test_img_equals_nparray(img, np_img)
|
|
self.assertEqual(np_img.dtype, numpy.dtype('<u2'))
|
|
|
|
def test_save_tiff_uint16(self):
|
|
'''
|
|
Open a single-channel uint16 greyscale image and verify that it can be saved without
|
|
losing precision.
|
|
'''
|
|
tmpfile = self.tempfile("temp.tif")
|
|
pixel_value = 0x1234
|
|
filename = "Tests/images/uint16_1_4660.tif"
|
|
a = numpy.array([pixel_value] * TEST_IMAGE_SIZE[0] * TEST_IMAGE_SIZE[1], dtype=numpy.uint16)
|
|
a.shape = TEST_IMAGE_SIZE
|
|
Image.fromarray(a).save(tmpfile)
|
|
im_test = Image.open(tmpfile)
|
|
im_good = Image.open(filename)
|
|
self.assert_image_equal(im_good, im_test)
|
|
|
|
def test_to_array(self):
|
|
|
|
def _to_array(mode, dtype):
|
|
img = hopper(mode)
|
|
|
|
# Resize to non-square
|
|
img = img.crop((3, 0, 124, 127))
|
|
self.assertEqual(img.size, (121, 127))
|
|
|
|
np_img = numpy.array(img)
|
|
self._test_img_equals_nparray(img, np_img)
|
|
self.assertEqual(np_img.dtype, numpy.dtype(dtype))
|
|
|
|
modes = [("L", 'uint8'),
|
|
("I", 'int32'),
|
|
("F", 'float32'),
|
|
("LA", 'uint8'),
|
|
("RGB", 'uint8'),
|
|
("RGBA", 'uint8'),
|
|
("RGBX", 'uint8'),
|
|
("CMYK", 'uint8'),
|
|
("YCbCr", 'uint8'),
|
|
("I;16", '<u2'),
|
|
("I;16B", '>u2'),
|
|
("I;16L", '<u2'),
|
|
("HSV", 'uint8'),
|
|
]
|
|
|
|
for mode in modes:
|
|
_to_array(*mode)
|
|
|
|
def test_point_lut(self):
|
|
# see https://github.com/python-pillow/Pillow/issues/439
|
|
|
|
data = list(range(256))*3
|
|
lut = numpy.array(data, dtype='uint8')
|
|
|
|
im = hopper()
|
|
|
|
im.point(lut)
|
|
|
|
def test_putdata(self):
|
|
# shouldn't segfault
|
|
# see https://github.com/python-pillow/Pillow/issues/1008
|
|
|
|
im = Image.new('F', (150, 100))
|
|
arr = numpy.zeros((15000,), numpy.float32)
|
|
im.putdata(arr)
|
|
|
|
self.assertEqual(len(im.getdata()), len(arr))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|
|
|
|
# End of file
|