37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
from __future__ import annotations
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import numpy as np
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from repixelizer.io import premultiply
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from repixelizer.source_reference import build_source_lattice_reference
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def test_source_lattice_reference_recovers_stable_cell_colors_and_deltas() -> None:
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lowres = np.asarray(
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[
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[[1.0, 0.0, 0.0, 1.0], [0.0, 0.0, 1.0, 1.0]],
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[[0.0, 1.0, 0.0, 1.0], [1.0, 1.0, 0.0, 1.0]],
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],
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dtype=np.float32,
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)
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source = np.repeat(np.repeat(lowres, 4, axis=0), 4, axis=1)
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source[1, 1, :3] = np.asarray([0.6, 0.1, 0.1], dtype=np.float32)
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reference = build_source_lattice_reference(
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source,
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target_width=2,
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target_height=2,
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phase_x=0.0,
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phase_y=0.0,
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)
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expected_premul = premultiply(lowres)
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assert np.allclose(reference.sharp_rgba, lowres, atol=1e-5)
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assert np.allclose(reference.mean_rgba[0, 1], lowres[0, 1], atol=1e-5)
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assert reference.delta_x is not None
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assert reference.delta_y is not None
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assert reference.delta_diag is not None
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assert reference.delta_anti is not None
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assert np.allclose(reference.delta_x, expected_premul[:, 1:, :] - expected_premul[:, :-1, :], atol=1e-5)
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assert np.allclose(reference.delta_y, expected_premul[1:, :, :] - expected_premul[:-1, :, :], atol=1e-5)
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assert reference.dispersion >= 0.0
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