def test_thumbnail():
"""Test the image thumbnail for square data."""
np.random.seed(0)
data = np.random.random((30, 30))
layer = Image(data)
layer._update_thumbnail()
assert layer.thumbnail.shape == layer._thumbnail_shape
def test_thumbnail():
"""Test the image thumbnail for square data."""
shapes = [(40, 40), (20, 20), (10, 10)]
np.random.seed(0)
data = [np.random.random(s) for s in shapes]
layer = Image(data, is_pyramid=True)
layer._update_thumbnail()
assert layer.thumbnail.shape == layer._thumbnail_shape
def test_narrow_thumbnail():
"""Ensure that the thumbnail generation works for very narrow images.
See: https://github.com/napari/napari/issues/641 and
https://github.com/napari/napari/issues/489
"""
image = np.random.random((1, 2048))
layer = Image(image)
layer._update_thumbnail()
thumbnail = layer.thumbnail[..., :3] # ignore alpha channel
middle_row = thumbnail.shape[0] // 2
assert np.all(thumbnail[:middle_row - 1] == 0)
assert np.all(thumbnail[middle_row + 1:] == 0)
assert np.mean(thumbnail[middle_row - 1:middle_row + 1]) > 0
class Image3DSuite:
"""Benchmarks for the Image layer with 3D data."""
params = [2**i for i in range(4, 11)]
def setup(self, n):
if "CI" in os.environ and n > 512:
raise NotImplementedError("Skip on CI (not enough memory)")
np.random.seed(0)
self.data = np.random.random((n, n, n))
self.new_data = np.random.random((n, n, n))
self.layer = Image(self.data)
def time_create_layer(self, n):
"""Time to create an image layer."""
Image(self.data)
def time_set_view_slice(self, n):
"""Time to set view slice."""
self.layer._set_view_slice()
def time_update_thumbnail(self, n):
"""Time to update thumbnail."""
self.layer._update_thumbnail()
def time_get_value(self, n):
"""Time to get current value."""
self.layer.get_value((0, ) * 3)
def time_set_data(self, n):
"""Time to get current value."""
self.layer.data = self.new_data
def time_refresh(self, n):
"""Time to refresh view."""
self.layer.refresh()
def mem_layer(self, n):
"""Memory used by layer."""
return Image(self.data)
def mem_data(self, n):
"""Memory used by raw data."""
return self.data
class Image2DSuite:
"""Benchmarks for the Image layer with 2D data."""
params = [2**i for i in range(4, 13)]
def setup(self, n):
np.random.seed(0)
self.data = np.random.random((n, n))
self.new_data = np.random.random((n, n))
self.layer = Image(self.data)
def time_create_layer(self, n):
"""Time to create an image layer."""
Image(self.data)
def time_set_view_slice(self, n):
"""Time to set view slice."""
self.layer._set_view_slice()
def time_update_thumbnail(self, n):
"""Time to update thumbnail."""
self.layer._update_thumbnail()
def time_get_value(self, n):
"""Time to get current value."""
self.layer.get_value()
def time_set_data(self, n):
"""Time to get current value."""
self.layer.data = self.new_data
def time_refresh(self, n):
"""Time to refresh view."""
self.layer.refresh()
def mem_layer(self, n):
"""Memory used by layer."""
return self.layer
def mem_data(self, n):
"""Memory used by raw data."""
return self.data
def test_out_of_range_no_contrast(dtype):
data = np.full((10, 15), -3.2, dtype=dtype)
layer = Image(data)
layer._update_thumbnail()
def test_out_of_range_image(dtype):
data = -1.7 - 0.001 * np.random.random((10, 15)).astype(dtype)
layer = Image(data)
layer._update_thumbnail()