nan
6c8358f92f
- Updated the naming convention for upscaled images to include underscores and file extensions. - Renamed properties related to cutout pixel size to point spacing for clarity. - Adjusted alpha region calculations to use a half-alpha threshold for better accuracy. - Enhanced the handling of foreground mesh masks to consider half-alpha values. - Introduced new functions for unbounded selections and cutout images, ensuring proper handling of source and selection images. - Improved test coverage for cutout functionalities, including bounds mapping and alpha preservation. - Updated tests to reflect changes in naming conventions and functionality adjustments.
367 lines
12 KiB
Python
367 lines
12 KiB
Python
import builtins
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import sys
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import tempfile
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from pathlib import Path
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from types import SimpleNamespace
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from unittest.mock import patch
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import numpy as np
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from PIL import Image
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SOURCE_ROOT = Path(__file__).parents[1] / "src"
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sys.path.insert(0, str(SOURCE_ROOT))
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from anyimage.operators import mesh
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from anyimage.operators.normal_map import rasterize_tangent_normal
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from anyimage.server.geometry.cutout import alpha_regions, image_alpha_regions
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def mesh_component_count(faces):
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adjacency = {}
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for face in faces:
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for vertex in face:
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adjacency.setdefault(int(vertex), set())
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for start, end in zip(face, np.roll(face, -1)):
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adjacency[int(start)].add(int(end))
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adjacency[int(end)].add(int(start))
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remaining = set(adjacency)
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count = 0
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while remaining:
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count += 1
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pending = [remaining.pop()]
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while pending:
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vertex = pending.pop()
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connected = adjacency[vertex] & remaining
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remaining.difference_update(connected)
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pending.extend(connected)
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return count
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def test_tangent_normal_pixels_use_the_final_surface_frame():
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object_normal = np.zeros((3, 3, 3), dtype=np.float32)
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object_normal[..., 2] = 1.0
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triangle_uv = np.asarray((((0.0, 0.0), (1.0, 0.0), (0.0, 1.0)),))
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triangle_normal = np.asarray((((1.0, 0.0, 0.0),) * 3,))
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triangle_tangent = np.asarray((((0.0, 1.0, 0.0),) * 3,))
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triangle_sign = np.ones((1, 3), dtype=np.float32)
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tangent = rasterize_tangent_normal(
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object_normal,
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triangle_uv,
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triangle_normal,
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triangle_tangent,
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triangle_sign,
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)
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assert np.allclose(tangent[0, 0], (0.0, 1.0, 0.0))
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assert not np.allclose(tangent[0, 0], object_normal[0, 0])
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assert np.allclose(tangent[2, 2], (0.0, 0.0, 1.0))
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def test_plane_source_topology_is_one_quad_at_every_detail_level():
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low = mesh._plane_domain((-2.0, 2.0, -1.0, 1.0), 1)
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high = mesh._plane_domain((-2.0, 2.0, -1.0, 1.0), 512)
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assert low[0].shape == high[0].shape == (4, 3)
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assert low[1].shape == high[1].shape == (1, 4)
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def test_cutout_front_back_and_side_faces_point_outward():
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vertices = np.asarray(
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((0.0, 0.0, 0.0), (0.0, 1.0, 0.0), (1.0, 0.0, 0.0)),
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dtype=np.float64,
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)
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faces = np.asarray(((0, 1, 2),), dtype=np.int32)
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uv = vertices[:, :2].astype(np.float32)
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boundary = np.ones(3, dtype=bool)
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layered = mesh._layered_geometry(
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(vertices, faces, uv, boundary, vertices[:, :2]),
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mesh.CUTOUT,
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)
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positioned = layered[0] + layered[3]
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output_faces = layered[1]
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def face_normal(face):
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points = positioned[np.asarray(face[:3], dtype=np.int32)]
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return np.cross(points[1] - points[0], points[2] - points[0])
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assert face_normal(output_faces[0])[2] > 0.0
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assert face_normal(output_faces[1])[2] < 0.0
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center = vertices[:, :2].mean(axis=0)
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for face in output_faces[2:]:
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normal = face_normal(face)
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side_center = positioned[np.asarray(face, dtype=np.int32), :2].mean(axis=0)
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assert np.dot(normal[:2], side_center - center) > 0.0
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def test_depth_surface_moves_both_sides_with_camera_projection_and_extrudes_back():
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domain = mesh._plane_domain((-1.0, 1.0, -1.0, 1.0), 4)
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field = np.zeros((2, 2, 3), dtype=np.float32)
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field[..., 2] = 1.0
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valid = np.ones((2, 2), dtype=bool)
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camera_depth = np.ones((2, 2), dtype=np.float32)
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depth_surface = mesh._layered_geometry(
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domain, mesh.DEPTH_SURFACE, (field, valid, camera_depth)
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)
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base_count = len(domain[0])
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assert np.allclose(depth_surface[4][:base_count, 2], 1.0)
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assert np.allclose(depth_surface[4][base_count:, 2], 1.0)
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assert np.allclose(depth_surface[3][:base_count], 0.0)
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assert np.allclose(depth_surface[3][base_count:, 2], -1.0)
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assert all(depth_surface[5][: len(domain[1])])
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assert not any(depth_surface[5][len(domain[1]) :])
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def test_depth_surface_records_depth_discontinuities_for_geometry_nodes():
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faces = np.asarray(((0, 1, 2), (1, 2, 3)), dtype=np.int32)
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depth = np.asarray((1.0, 1.01, 1.02, 2.0), dtype=np.float32)
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discontinuity = mesh._depth_discontinuity_values(faces, depth)
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assert discontinuity[0] < mesh.DEPTH_EDGE_THRESHOLD
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assert discontinuity[1] > mesh.DEPTH_EDGE_THRESHOLD
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def test_depth_surface_discontinuity_map_uses_local_three_by_three_range():
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depth = np.ones((5, 5), dtype=np.float32)
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depth[:, 3:] = 2.0
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valid = np.ones_like(depth, dtype=bool)
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discontinuity = mesh._depth_discontinuity_map(depth, valid)
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assert discontinuity[2, 0] < mesh.DEPTH_EDGE_THRESHOLD
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assert discontinuity[2, 2] > mesh.DEPTH_EDGE_THRESHOLD
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def test_cutout_regions_group_holes_with_their_connected_component():
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with tempfile.TemporaryDirectory() as directory:
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path = Path(directory) / "cutout.png"
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pixels = np.zeros((120, 200, 4), dtype=np.uint8)
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pixels[20:100, 50:160] = (20, 40, 60, 255)
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pixels[45:75, 80:120] = 0
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pixels[5:15, 5:15] = (20, 40, 60, 255)
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Image.fromarray(pixels, mode="RGBA").save(path)
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regions, size = image_alpha_regions(path, max_resolution=200)
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assert size == (200, 120)
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assert sorted(len(region) for region in regions) == [1, 2]
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contours = [contour for region in regions for contour in region]
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bounds = [
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(*np.min(contour, axis=0), *np.max(contour, axis=0))
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for contour in contours
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]
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assert (50.0, 20.0, 160.0, 100.0) in bounds
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assert (80.0, 45.0, 120.0, 75.0) in bounds
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assert (5.0, 5.0, 15.0, 15.0) in bounds
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def test_alpha_regions_accepts_blender_float_alpha_with_a_hole():
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alpha = np.zeros((120, 200), dtype=np.float32)
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alpha[20:100, 50:160] = 1.0
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alpha[45:75, 80:120] = 0.0
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regions, size = alpha_regions(alpha, max_resolution=200)
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assert size == (200, 120)
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assert len(regions) == 1
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assert len(regions[0]) == 2
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def test_cutout_crop_bounds_map_to_the_source_plane():
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source = SimpleNamespace(
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data=SimpleNamespace(size=(200, 100)),
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empty_display_size=2.0,
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empty_image_offset=(-0.5, -0.5),
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)
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bounds = mesh._crop_plane_bounds(
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source,
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(50, 25, 150, 75),
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(200, 100),
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)
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np.testing.assert_allclose(bounds, (-0.5, 0.5, -0.25, 0.25))
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def test_depth_surface_cutout_uses_half_alpha_boundary():
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alpha = np.zeros((12, 16), dtype=np.float32)
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alpha[2:10, 2:14] = 0.49
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alpha[4:8, 5:11] = 0.51
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regions, size = mesh._cutout_regions(alpha, 64, threshold=0.5)
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contour = np.asarray(regions[0][0])
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assert size == (16, 12)
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np.testing.assert_allclose(contour.min(axis=0), (5.0, 4.0))
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np.testing.assert_allclose(contour.max(axis=0), (11.0, 8.0))
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def test_blender_cutout_alpha_pipeline_does_not_import_pillow():
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original_import = builtins.__import__
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def without_pillow(name, *args, **kwargs):
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if name == "PIL" or name.startswith("PIL."):
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raise ModuleNotFoundError("Pillow is unavailable in Blender")
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return original_import(name, *args, **kwargs)
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selection = np.zeros((32, 48), dtype=bool)
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selection[4:28, 6:42] = True
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with patch("builtins.__import__", side_effect=without_pillow):
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antialiased = mesh._antialias_selection(selection)
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regions, size = alpha_regions(antialiased, max_resolution=24)
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assert size == (48, 32)
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assert regions
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assert np.any((antialiased > 0.0) & (antialiased < 1.0))
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def test_cutout_geometry_ignores_source_alpha_without_refine():
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alpha = np.zeros((80, 120), dtype=np.float32)
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alpha[10:70, 10:110] = 1.0
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alpha[30:50, 45:75] = 0.0
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polygon = ((10, 10), (110, 10), (110, 70), (10, 70))
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regions, size = mesh._geometry_cutout_regions(alpha, polygon, 64)
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assert size == (120, 80)
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assert len(regions) == 1
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assert len(regions[0]) == 1
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def test_cutout_geometry_uses_final_alpha_with_refine():
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alpha = np.zeros((80, 120), dtype=np.float32)
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alpha[10:70, 10:110] = 1.0
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alpha[30:50, 45:75] = 0.0
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polygon = ((10, 10), (110, 10), (110, 70), (10, 70))
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regions, size = mesh._geometry_cutout_regions(
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alpha, polygon, 64, refine_selection=True
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)
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assert size == (120, 80)
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assert len(regions) == 1
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assert len(regions[0]) == 2
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def test_cutout_geometry_can_extend_beyond_the_source_image():
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alpha = np.zeros((60, 100), dtype=np.float32)
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alpha[10:50] = 1.0
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polygon = ((-20, 10), (120, 10), (120, 50), (-20, 50))
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regions, size = mesh._geometry_cutout_regions(alpha, polygon, 64)
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points = np.concatenate(
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[np.asarray(contour) for region in regions for contour in region]
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)
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assert size == (100, 60)
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assert points[:, 0].min() <= -19.0
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assert points[:, 0].max() >= 119.0
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def test_refined_cutout_geometry_discards_out_of_frame_selection():
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alpha = np.zeros((60, 100), dtype=np.float32)
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alpha[10:50] = 1.0
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polygon = ((-20, 10), (120, 10), (120, 50), (-20, 50))
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regions, size = mesh._geometry_cutout_regions(
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alpha, polygon, 64, refine_selection=True
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)
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points = np.concatenate(
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[np.asarray(contour) for region in regions for contour in region]
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)
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assert size == (100, 60)
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assert points[:, 0].min() >= 0.0
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assert points[:, 0].max() <= 100.0
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def test_blender_cutout_contour_resolution_tracks_mesh_detail():
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expected = ([(((0, 0), (1, 0), (0, 1)),)], (1, 1))
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alpha = np.ones((2, 2), dtype=np.float32)
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with patch.object(mesh, "alpha_regions", return_value=expected) as trace:
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assert mesh._cutout_regions(alpha, 32) == expected
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assert mesh._cutout_regions(alpha, 256) == expected
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assert trace.call_args_list[0].kwargs["max_resolution"] == 512
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assert trace.call_args_list[1].kwargs["max_resolution"] == 1024
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def test_cutout_point_spacing_uses_the_complete_source_plane():
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source = SimpleNamespace(matrix_world=object())
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with (
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patch.object(mesh, "plane_bounds", return_value=(-2.0, 2.0, -1.0, 1.0)),
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patch.object(
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mesh,
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"_world_plane_metric",
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return_value=(((1.0, 0.0), (0.0, 1.0)), 1.0),
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),
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):
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spacing = mesh._cutout_point_spacing(source, 200)
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assert spacing == 0.02
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def test_cutout_domain_adapts_boundary_spacing_for_a_small_valid_region():
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regions = (
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(((2046, 2046), (2050, 2046), (2050, 2050), (2046, 2050)),),
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)
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domain = mesh._cutout_domain(
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regions,
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(4096, 4096),
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(-1.0, 1.0, -1.0, 1.0),
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0.5,
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((1.0, 0.0), (0.0, 1.0)),
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)
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assert len(domain[0]) >= 3
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assert len(domain[1]) >= 1
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def test_cutout_domain_builds_a_full_image_at_minimum_detail():
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regions = ((((0, 0), (4096, 0), (4096, 4096), (0, 4096)),),)
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domain = mesh._cutout_domain(
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regions,
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(4096, 4096),
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(-1.0, 1.0, -1.0, 1.0),
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0.5,
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((1.0, 0.0), (0.0, 1.0)),
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)
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assert len(domain[0]) >= 4
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assert len(domain[1]) >= 2
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def test_cutout_domain_keeps_overlapping_regions_disconnected():
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regions = (
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(
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((20, 0), (100, 0), (100, 80), (20, 80)),
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((50, 20), (50, 60), (70, 60), (70, 20)),
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),
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(
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((0, 20), (40, 20), (40, 50), (0, 50)),
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),
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)
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domain = mesh._cutout_domain(
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regions,
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(120, 80),
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(0.0, 1.0, 0.0, 1.0),
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0.025,
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((1.0, 0.0), (0.0, 1.0)),
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)
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centers = domain[2][domain[1]].mean(axis=1)
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in_hole = (
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(centers[:, 0] > 0.45)
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& (centers[:, 0] < 0.55)
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& (centers[:, 1] > 0.35)
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& (centers[:, 1] < 0.65)
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)
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in_left_region = (
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(centers[:, 0] > 0.02)
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& (centers[:, 0] < 0.12)
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& (centers[:, 1] > 0.4)
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& (centers[:, 1] < 0.75)
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)
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assert not in_hole.any()
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assert in_left_region.any()
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assert mesh_component_count(domain[1]) == 2
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