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Work repository for PIL 1.1.7 and beyond. The "default" branch should be fairly solid, the other branches less so. For production use, see the pil-117 repository.

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pil-2009-raclette / Tests / test_numpy.py

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from tester import *

from PIL import Image
try:
    import numpy
except ImportError:
    skip()

def test_numpy_to_image():

    def to_image(dtype, bands=1, bool=0):
        if bands == 1:
            if bool:
                data = [0, 1] * 50
            else:
                data = range(100)
            a = numpy.array(data, dtype=dtype)
            a.shape = 10, 10
            i = Image.fromarray(a)
            if list(i.getdata()) != data:
                print "data mismatch for", dtype
        else:
            data = range(100)
            a = numpy.array([[x]*bands for x in data], dtype=dtype)
            a.shape = 10, 10, bands
            i = Image.fromarray(a)
            if list(i.split()[0].getdata()) != range(100):
                print "data mismatch for", dtype
        # print dtype, list(i.getdata())
        return i

    assert_image(to_image(numpy.bool, bool=1), "L", (10, 10))
    assert_image(to_image(numpy.bool8, bool=1), "L", (10, 10))

    assert_exception(TypeError, lambda: to_image(numpy.uint))
    assert_image(to_image(numpy.uint8), "L", (10, 10))
    assert_exception(TypeError, lambda: to_image(numpy.uint16))
    assert_exception(TypeError, lambda: to_image(numpy.uint32))
    assert_exception(TypeError, lambda: to_image(numpy.uint64))

    assert_image(to_image(numpy.int), "I", (10, 10))
    assert_image(to_image(numpy.int8), "I", (10, 10))
    assert_image(to_image(numpy.int16), "I;16", (10, 10))
    assert_image(to_image(numpy.int32), "I", (10, 10))
    assert_exception(TypeError, lambda: to_image(numpy.int64))

    assert_image(to_image(numpy.float), "F", (10, 10))
    assert_image(to_image(numpy.float32), "F", (10, 10))
    assert_image(to_image(numpy.float64), "F", (10, 10))

    assert_image(to_image(numpy.uint8, 3), "RGB", (10, 10))
    assert_image(to_image(numpy.uint8, 4), "RGBA", (10, 10))