554 lines
22 KiB
Python
554 lines
22 KiB
Python
from __future__ import annotations
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import hashlib
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from pathlib import Path
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import numpy as np
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from repixelizer.analysis import analyze_phase_field_source
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from repixelizer.baselines import naive_resize_baseline
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from repixelizer.metrics import coherence_breakdown, foreground_reconstruction_error, source_lattice_consistency_breakdown
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from repixelizer.params import SolverHyperParams
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from repixelizer.pipeline import _run_reconstruction, _select_phase_candidate, run_pipeline
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from repixelizer.phase_field import optimize_phase_field
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from repixelizer.io import nearest_resize
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from repixelizer.synthetic import fake_pixelize, make_emblem, make_sprite
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from repixelizer.types import InferenceCandidate, InferenceResult, SolverArtifacts
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def test_pipeline_writes_output_and_diagnostics(tmp_path: Path) -> None:
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source = make_emblem(32, 32)
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fake = fake_pixelize(source, upscale=10, phase_x=0.15, phase_y=0.25, blur_radius=0.5)
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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diagnostics_dir = tmp_path / "diagnostics"
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from repixelizer.io import save_rgba
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save_rgba(input_path, fake)
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result = run_pipeline(input_path, output_path, diagnostics_dir=diagnostics_dir, steps=24)
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assert output_path.exists()
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assert (diagnostics_dir / "run.json").exists()
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assert (diagnostics_dir / "output-preview.png").exists()
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assert (diagnostics_dir / "displacement-initial_output.png").exists()
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assert (diagnostics_dir / "displacement-initial_output-preview.png").exists()
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import json
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run_json = json.loads((diagnostics_dir / "run.json").read_text(encoding="utf-8"))
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assert set(run_json["source_fidelity"].keys()) == {"initial_output", "solver_target", "final_output"}
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assert "source_structure" in run_json
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assert {"edge_f1", "exact_match_ratio", "score"} <= set(run_json["source_structure"].keys())
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assert "phase_rerank_candidates" in run_json
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assert {"initial_output", "final_output"} <= set(run_json["optimizer_displacement"].keys())
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assert result.output_rgba.shape[0] == result.inference.target_height
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assert result.output_rgba.shape[1] == result.inference.target_width
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def test_pipeline_beats_naive_on_roundtrip_fidelity_for_synthetic_emblem(tmp_path: Path) -> None:
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source = make_emblem(32, 32)
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fake = fake_pixelize(
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source,
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upscale=12,
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phase_x=0.2,
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phase_y=0.35,
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blur_radius=0.65,
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warp_strength=0.28,
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warp_detail=6,
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seed=5,
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)
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, fake)
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result = run_pipeline(input_path, output_path, steps=32)
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naive = naive_resize_baseline(fake, width=result.inference.target_width, height=result.inference.target_height)
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optimized_preview = nearest_resize(result.output_rgba, width=source.shape[1], height=source.shape[0])
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naive_preview = nearest_resize(naive, width=source.shape[1], height=source.shape[0])
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optimized_error = foreground_reconstruction_error(optimized_preview, source)
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naive_error = foreground_reconstruction_error(naive_preview, source)
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assert optimized_error <= naive_error
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def test_pipeline_preserves_transparency_for_sprite(tmp_path: Path) -> None:
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source = make_sprite(24, 24)
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fake = fake_pixelize(source, upscale=9, phase_x=0.1, phase_y=0.22, blur_radius=0.45)
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, fake)
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result = run_pipeline(input_path, output_path, steps=20)
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alpha = result.output_rgba[..., 3]
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assert alpha.min() < 0.05
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assert alpha.max() > 0.9
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partial = alpha[(alpha > 0.05) & (alpha < 0.95)]
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assert partial.size == 0
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def test_pipeline_can_strip_checkerboard_background(tmp_path: Path) -> None:
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source = make_sprite(24, 24)
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checker = np.ones_like(source)
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checker[..., 3] = 1.0
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for y in range(checker.shape[0]):
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for x in range(checker.shape[1]):
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tile = 0.97 if ((x // 4) + (y // 4)) % 2 == 0 else 0.91
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checker[y, x, :3] = tile
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alpha = source[..., 3:4]
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opaque_input = checker.copy()
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opaque_input[..., :3] = source[..., :3] * alpha + checker[..., :3] * (1.0 - alpha)
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, opaque_input)
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result = run_pipeline(input_path, output_path, target_size=24, steps=0, strip_background=True)
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assert result.source_rgba[..., 3].min() < 0.05
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assert result.output_rgba[..., 3].min() < 0.05
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assert result.output_rgba[..., 3].max() > 0.9
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def test_pipeline_can_emit_initialized_output_without_optimizer_steps(tmp_path: Path) -> None:
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source = make_emblem(24, 24)
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fake = fake_pixelize(source, upscale=10, phase_x=0.15, phase_y=0.2, blur_radius=0.6, warp_strength=0.2, warp_detail=5)
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, fake)
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result = run_pipeline(input_path, output_path, steps=0)
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assert output_path.exists()
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assert result.output_rgba.shape[0] == result.inference.target_height
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assert result.output_rgba.shape[1] == result.inference.target_width
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def test_fixed_phase_field_pipeline_output_matches_refactor_baseline(tmp_path: Path) -> None:
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source = make_emblem(24, 24)
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fake = fake_pixelize(
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source,
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upscale=8,
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phase_x=0.1,
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phase_y=-0.05,
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blur_radius=0.4,
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warp_strength=0.15,
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warp_detail=4,
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seed=9,
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)
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input_path = tmp_path / "phase-field-baseline-input.png"
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output_path = tmp_path / "phase-field-baseline-output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, fake)
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result = run_pipeline(
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input_path,
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output_path,
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target_width=24,
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target_height=24,
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phase_x=0.1,
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phase_y=-0.05,
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enable_phase_rerank=False,
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steps=0,
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device="cpu",
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)
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output_hash = hashlib.sha256(np.ascontiguousarray(result.output_rgba).view(np.uint8)).hexdigest()
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assert output_hash == "9e01caa4ee4b508876d9a8360e5c8471f5ab07baf8ed1e5a08e76b9d3533c58e"
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def test_phase_rerank_can_override_low_confidence_inference_pick(monkeypatch) -> None:
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source = np.zeros((2, 2, 4), dtype=np.float32)
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source[0, 0] = np.asarray([1.0, 0.0, 0.0, 1.0], dtype=np.float32)
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candidate_a = InferenceCandidate(target_width=2, target_height=2, phase_x=-0.4, phase_y=0.2, score=0.91, breakdown={})
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candidate_b = InferenceCandidate(target_width=2, target_height=2, phase_x=0.4, phase_y=0.2, score=0.909, breakdown={})
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inference = InferenceResult(
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target_width=2,
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target_height=2,
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phase_x=candidate_a.phase_x,
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phase_y=candidate_a.phase_y,
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confidence=0.1,
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top_candidates=[candidate_a, candidate_b],
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)
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outputs = {
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(candidate_a.phase_x, candidate_a.phase_y): np.ones_like(source),
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(candidate_b.phase_x, candidate_b.phase_y): source.copy(),
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}
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class DummyArtifacts:
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def __init__(self, rgba: np.ndarray) -> None:
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self.target_rgba = rgba
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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assert steps == 8
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return DummyArtifacts(outputs[(inference.phase_x, inference.phase_y)])
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
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selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
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assert selected.phase_x == candidate_b.phase_x
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assert selected.phase_y == candidate_b.phase_y
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def test_phase_rerank_preview_respects_requested_zero_steps(monkeypatch) -> None:
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source = np.zeros((2, 2, 4), dtype=np.float32)
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candidate_a = InferenceCandidate(target_width=2, target_height=2, phase_x=-0.4, phase_y=0.2, score=0.91, breakdown={})
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candidate_b = InferenceCandidate(target_width=2, target_height=2, phase_x=0.4, phase_y=0.2, score=0.909, breakdown={})
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inference = InferenceResult(
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target_width=2,
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target_height=2,
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phase_x=candidate_a.phase_x,
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phase_y=candidate_a.phase_y,
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confidence=0.1,
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top_candidates=[candidate_a, candidate_b],
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)
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class DummyArtifacts:
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def __init__(self, rgba: np.ndarray) -> None:
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self.target_rgba = rgba
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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assert steps == 0
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return DummyArtifacts(np.zeros_like(source_rgba))
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
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_select_phase_candidate(source, inference, analysis=object(), steps=0, seed=7, device="cpu")
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def test_phase_rerank_can_override_to_better_size_candidate(monkeypatch) -> None:
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source = np.zeros((16, 16, 4), dtype=np.float32)
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candidate_a = InferenceCandidate(target_width=16, target_height=16, phase_x=0.0, phase_y=0.0, score=0.91, breakdown={})
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candidate_b = InferenceCandidate(target_width=18, target_height=18, phase_x=0.0, phase_y=0.0, score=0.88, breakdown={})
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inference = InferenceResult(
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target_width=16,
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target_height=16,
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phase_x=0.0,
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phase_y=0.0,
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confidence=0.0,
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top_candidates=[candidate_a, candidate_b],
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)
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class DummyArtifacts:
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def __init__(self, rgba: np.ndarray) -> None:
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self.target_rgba = rgba
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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rgba = np.zeros((inference.target_height, inference.target_width, 4), dtype=np.float32)
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return DummyArtifacts(rgba)
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def fake_support(source_rgba, output_rgba, *, target_width, target_height, phase_x, phase_y):
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if target_width == 16:
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return {"score": 0.10}
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return {"score": 0.01}
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
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monkeypatch.setattr("repixelizer.pipeline.source_lattice_consistency_breakdown", fake_support)
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selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
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assert selected.target_width == candidate_b.target_width
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assert selected.target_height == candidate_b.target_height
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def test_phase_rerank_rejects_large_size_jump(monkeypatch) -> None:
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source = np.zeros((16, 16, 4), dtype=np.float32)
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candidate_a = InferenceCandidate(target_width=16, target_height=16, phase_x=0.0, phase_y=0.0, score=0.91, breakdown={})
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candidate_b = InferenceCandidate(target_width=24, target_height=24, phase_x=0.0, phase_y=0.0, score=0.88, breakdown={})
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inference = InferenceResult(
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target_width=16,
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target_height=16,
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phase_x=0.0,
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phase_y=0.0,
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confidence=0.0,
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top_candidates=[candidate_a, candidate_b],
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)
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class DummyArtifacts:
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def __init__(self, rgba: np.ndarray) -> None:
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self.target_rgba = rgba
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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rgba = np.zeros((inference.target_height, inference.target_width, 4), dtype=np.float32)
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return DummyArtifacts(rgba)
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def fake_support(source_rgba, output_rgba, *, target_width, target_height, phase_x, phase_y):
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if target_width == 16:
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return {"score": 0.10}
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return {"score": 0.01}
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
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monkeypatch.setattr("repixelizer.pipeline.source_lattice_consistency_breakdown", fake_support)
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selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
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assert selected.target_width == candidate_a.target_width
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assert selected.target_height == candidate_a.target_height
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def test_select_phase_candidate_can_skip_phase_rerank(monkeypatch) -> None:
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source = np.zeros((8, 8, 4), dtype=np.float32)
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candidate_a = InferenceCandidate(target_width=8, target_height=8, phase_x=0.0, phase_y=0.0, score=0.9, breakdown={})
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candidate_b = InferenceCandidate(target_width=10, target_height=10, phase_x=0.2, phase_y=0.2, score=0.89, breakdown={})
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inference = InferenceResult(
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target_width=8,
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target_height=8,
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phase_x=0.0,
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phase_y=0.0,
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confidence=0.0,
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top_candidates=[candidate_a, candidate_b],
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)
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def fail(*args, **kwargs):
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raise AssertionError("phase rerank probe should not run when disabled")
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fail)
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selected = _select_phase_candidate(
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source,
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inference,
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analysis=object(),
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steps=32,
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seed=7,
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device="cpu",
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enable_phase_rerank=False,
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)
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assert selected.target_width == candidate_a.target_width
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assert selected.target_height == candidate_a.target_height
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def test_pipeline_runs_phase_field_mode(tmp_path: Path, monkeypatch) -> None:
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source = np.zeros((6, 6, 4), dtype=np.float32)
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source[..., 3] = 1.0
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, source)
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inference = InferenceResult(
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target_width=3,
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target_height=3,
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phase_x=0.0,
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phase_y=0.0,
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confidence=1.0,
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top_candidates=[],
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)
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class DummyAnalysis:
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edge_map = np.zeros((6, 6), dtype=np.float32)
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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del source_rgba, analysis, steps, seed, device, solver_params
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rgba = np.zeros((inference.target_height, inference.target_width, 4), dtype=np.float32)
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rgba[..., 1] = 1.0
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rgba[..., 3] = 1.0
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return SolverArtifacts(
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target_rgba=rgba,
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uv_field=np.zeros((inference.target_height, inference.target_width, 2), dtype=np.float32),
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guidance_strength=np.zeros((inference.target_height, inference.target_width), dtype=np.float32),
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initial_rgba=rgba.copy(),
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loss_history=[0.0],
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stage_diagnostics={
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"displacements": {},
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"phase_field": {"mean_displacement_px": 0.0},
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},
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)
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monkeypatch.setattr("repixelizer.pipeline.infer_lattice", lambda *args, **kwargs: inference)
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monkeypatch.setattr("repixelizer.pipeline.analyze_phase_field_source", lambda *args, **kwargs: DummyAnalysis())
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monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
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result = run_pipeline(
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input_path,
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output_path,
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steps=8,
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device="cpu",
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)
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assert output_path.exists()
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assert result.output_rgba.shape[:2] == (3, 3)
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assert result.diagnostics["reconstruction"]["mode"] == "phase-field"
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def test_pipeline_fixed_target_and_phase_skip_search_inference(tmp_path: Path, monkeypatch) -> None:
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source = np.zeros((6, 6, 4), dtype=np.float32)
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source[..., 3] = 1.0
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input_path = tmp_path / "input.png"
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output_path = tmp_path / "output.png"
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from repixelizer.io import save_rgba
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save_rgba(input_path, source)
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inference = InferenceResult(
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target_width=3,
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target_height=3,
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phase_x=0.2,
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phase_y=-0.2,
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confidence=1.0,
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top_candidates=[],
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)
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class DummyAnalysis:
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edge_map = np.zeros((6, 6), dtype=np.float32)
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def fail_infer(*args, **kwargs):
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raise AssertionError("full lattice search should not run for fixed target/phase")
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def fake_infer_fixed(*args, **kwargs):
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return inference
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def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
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rgba = np.zeros((inference.target_height, inference.target_width, 4), dtype=np.float32)
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rgba[..., 3] = 1.0
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return SolverArtifacts(
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target_rgba=rgba,
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uv_field=np.zeros((inference.target_height, inference.target_width, 2), dtype=np.float32),
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guidance_strength=np.zeros((inference.target_height, inference.target_width), dtype=np.float32),
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initial_rgba=rgba.copy(),
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loss_history=[],
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)
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monkeypatch.setattr("repixelizer.pipeline.infer_lattice", fail_infer)
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monkeypatch.setattr("repixelizer.pipeline.infer_fixed_lattice", fake_infer_fixed)
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monkeypatch.setattr("repixelizer.pipeline.analyze_phase_field_source", lambda *args, **kwargs: DummyAnalysis())
|
|
monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
|
|
|
|
result = run_pipeline(
|
|
input_path,
|
|
output_path,
|
|
target_width=3,
|
|
target_height=3,
|
|
phase_x=0.2,
|
|
phase_y=-0.2,
|
|
enable_phase_rerank=False,
|
|
steps=0,
|
|
device="cpu",
|
|
)
|
|
|
|
assert output_path.exists()
|
|
assert result.inference.target_width == 3
|
|
assert result.inference.target_height == 3
|
|
assert result.inference.phase_x == 0.2
|
|
assert result.inference.phase_y == -0.2
|
|
|
|
|
|
def test_phase_rerank_can_accept_low_confidence_size_jump_with_strong_support(monkeypatch) -> None:
|
|
source = np.zeros((16, 16, 4), dtype=np.float32)
|
|
candidate_a = InferenceCandidate(target_width=16, target_height=16, phase_x=0.0, phase_y=0.0, score=0.91, breakdown={})
|
|
candidate_b = InferenceCandidate(target_width=21, target_height=21, phase_x=0.2, phase_y=-0.2, score=0.89, breakdown={})
|
|
inference = InferenceResult(
|
|
target_width=16,
|
|
target_height=16,
|
|
phase_x=0.0,
|
|
phase_y=0.0,
|
|
confidence=0.0,
|
|
top_candidates=[candidate_a, candidate_b],
|
|
)
|
|
|
|
class DummyArtifacts:
|
|
def __init__(self, rgba: np.ndarray) -> None:
|
|
self.target_rgba = rgba
|
|
|
|
outputs = {
|
|
candidate_a.target_width: np.zeros((candidate_a.target_height, candidate_a.target_width, 4), dtype=np.float32),
|
|
candidate_b.target_width: np.ones((candidate_b.target_height, candidate_b.target_width, 4), dtype=np.float32),
|
|
}
|
|
|
|
def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
|
|
return DummyArtifacts(outputs[inference.target_width])
|
|
|
|
def fake_support(source_rgba, output_rgba, *, target_width, target_height, phase_x, phase_y):
|
|
return {"score": 0.22 if target_width == 16 else 0.03}
|
|
|
|
def fake_edge_position(preview, source_rgba):
|
|
return 0.07 if np.mean(preview) < 0.1 else 0.02
|
|
|
|
def fake_wobble(preview, source_rgba):
|
|
return 1.25 if np.mean(preview) < 0.1 else 0.55
|
|
|
|
def fake_concentration(rgba):
|
|
return 0.18 if np.mean(rgba) < 0.1 else 0.31
|
|
|
|
monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
|
|
monkeypatch.setattr("repixelizer.pipeline.source_lattice_consistency_breakdown", fake_support)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_edge_position_error", fake_edge_position)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_stroke_wobble_error", fake_wobble)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_edge_concentration", fake_concentration)
|
|
|
|
selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
|
|
assert selected.target_width == candidate_b.target_width
|
|
assert selected.target_height == candidate_b.target_height
|
|
|
|
|
|
def test_phase_rerank_keeps_high_confidence_candidate_without_probe(monkeypatch) -> None:
|
|
source = np.zeros((8, 8, 4), dtype=np.float32)
|
|
candidate_a = InferenceCandidate(target_width=8, target_height=8, phase_x=0.0, phase_y=0.0, score=0.9, breakdown={})
|
|
candidate_b = InferenceCandidate(target_width=10, target_height=10, phase_x=0.2, phase_y=0.2, score=0.89, breakdown={})
|
|
inference = InferenceResult(
|
|
target_width=8,
|
|
target_height=8,
|
|
phase_x=0.0,
|
|
phase_y=0.0,
|
|
confidence=0.5,
|
|
top_candidates=[candidate_a, candidate_b],
|
|
)
|
|
|
|
def fail(*args, **kwargs):
|
|
raise AssertionError("rerank probe should not run for high-confidence inference")
|
|
|
|
monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fail)
|
|
selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
|
|
assert selected.target_width == candidate_a.target_width
|
|
assert selected.target_height == candidate_a.target_height
|
|
|
|
|
|
def test_phase_rerank_can_prefer_better_line_metrics(monkeypatch) -> None:
|
|
source = np.zeros((4, 4, 4), dtype=np.float32)
|
|
candidate_a = InferenceCandidate(target_width=2, target_height=2, phase_x=-0.2, phase_y=0.0, score=0.91, breakdown={})
|
|
candidate_b = InferenceCandidate(target_width=2, target_height=2, phase_x=0.2, phase_y=0.0, score=0.909, breakdown={})
|
|
inference = InferenceResult(
|
|
target_width=2,
|
|
target_height=2,
|
|
phase_x=candidate_a.phase_x,
|
|
phase_y=candidate_a.phase_y,
|
|
confidence=0.0,
|
|
top_candidates=[candidate_a, candidate_b],
|
|
)
|
|
|
|
class DummyArtifacts:
|
|
def __init__(self, rgba: np.ndarray) -> None:
|
|
self.target_rgba = rgba
|
|
|
|
def fake_support(source_rgba, output_rgba, *, target_width, target_height, phase_x, phase_y):
|
|
return {"score": 0.02}
|
|
|
|
def fake_edge_position(preview, source_rgba):
|
|
return 0.05
|
|
|
|
def fake_wobble(preview, source_rgba):
|
|
return 1.2 if np.mean(preview) < 0.01 else 0.8
|
|
|
|
def fake_concentration(rgba):
|
|
return 0.15 if np.mean(rgba) < 0.01 else 0.28
|
|
|
|
outputs = {
|
|
candidate_a.phase_x: np.zeros((2, 2, 4), dtype=np.float32),
|
|
candidate_b.phase_x: np.ones((2, 2, 4), dtype=np.float32),
|
|
}
|
|
|
|
def fake_optimize_phase_field(source_rgba, inference, analysis, steps, seed, device, solver_params=None):
|
|
return DummyArtifacts(outputs[inference.phase_x])
|
|
|
|
monkeypatch.setattr("repixelizer.pipeline.optimize_phase_field", fake_optimize_phase_field)
|
|
monkeypatch.setattr("repixelizer.pipeline.source_lattice_consistency_breakdown", fake_support)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_edge_position_error", fake_edge_position)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_stroke_wobble_error", fake_wobble)
|
|
monkeypatch.setattr("repixelizer.pipeline.foreground_edge_concentration", fake_concentration)
|
|
|
|
selected = _select_phase_candidate(source, inference, analysis=object(), steps=32, seed=7, device="cpu")
|
|
assert selected.phase_x == candidate_b.phase_x
|
|
assert selected.phase_y == candidate_b.phase_y
|