198 lines
7.0 KiB
Python
198 lines
7.0 KiB
Python
from copy import deepcopy
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from functools import partial
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from itertools import starmap, repeat
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from typing import List
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import fpdf
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import numpy as np
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import pdf2image
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import pytest
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from PIL import Image
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from funcy import merge, juxt, one
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from image_prediction.estimator.preprocessor.utils import image_to_normalized_tensor
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from image_prediction.image_extractor.extractor import ImageMetadataPair
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from image_prediction.info import Info
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from image_prediction.stitching.stitching import stitch_pairs
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from image_prediction.stitching.utils import (
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make_coord_getter,
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make_length_getter,
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)
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from image_prediction.stitching.merging import merge_metadata_horizontally, merge_metadata_vertically, \
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merge_pair_horizontally, merge_pair_vertically, concat_images_horizontally, concat_images_vertically, \
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merge_group_horizontally, merge_group_vertically
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from test.conftest import (
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get_base_position_metadata,
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add_image,
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random_single_color_image_from_metadata,
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random_size_gray_image_from_metadata,
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)
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from test.utils.stitching import BoxSplitter
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x1_getter, y1_getter, x2_getter, y2_getter = map(make_coord_getter, ("x1", "y1", "x2", "y2"))
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width_getter, height_getter = map(make_length_getter, ("width", "height"))
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def test_image_stitcher(patch_image_metadata_pairs, base_patch_metadata, base_patch_image):
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pair_stitched = stitch_pairs(patch_image_metadata_pairs)[0]
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assert pair_stitched.metadata == base_patch_metadata
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assert images_equal(pair_stitched.image.resize((10, 10)), base_patch_image.resize((10, 10)), atol=0.4)
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def test_merge_group_horizontally(horizontal_merge_test_pairs):
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pr1, pr2, pr_merged_expected = horizontal_merge_test_pairs
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prs_merged = merge_group_horizontally([pr1, pr2])
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assert len(prs_merged) == 1
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assert pair_equal(prs_merged[0], pr_merged_expected)
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mdat3 = deepcopy(pr2.metadata)
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mdat3[Info.HEIGHT] += 30
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mdat3[Info.Y2] += 30
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im3 = random_size_gray_image_from_metadata(mdat3)
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pr3 = ImageMetadataPair(im3, mdat3)
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prs_merged = merge_group_horizontally([pr1, pr2, pr3])
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assert len(prs_merged) == 2
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assert one(partial(pair_equal, pr_merged_expected), prs_merged)
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def test_merge_group_vertically(vertical_merge_test_pairs):
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pr1, pr2, pr_merged_expected = vertical_merge_test_pairs
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prs_merged = merge_group_vertically([pr1, pr2])
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assert len(prs_merged) == 1
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assert pair_equal(prs_merged[0], pr_merged_expected)
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mdat3 = deepcopy(pr2.metadata)
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mdat3[Info.WIDTH] += 30
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mdat3[Info.X2] += 30
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im3 = random_size_gray_image_from_metadata(mdat3)
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pr3 = ImageMetadataPair(im3, mdat3)
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prs_merged = merge_group_vertically([pr1, pr2, pr3])
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assert len(prs_merged) == 2
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assert one(partial(pair_equal, pr_merged_expected), prs_merged)
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def pair_equal(pr1, pr2):
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return pr1.metadata == pr2.metadata and images_equal(pr1.image, pr2.image)
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def test_merge_pairs_horizontally(horizontal_merge_test_pairs):
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pr1, pr2, pr_merged_expected = horizontal_merge_test_pairs
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pr_merged = merge_pair_horizontally(pr1, pr2)
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assert pair_equal(pr_merged, pr_merged_expected)
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def test_merge_pairs_vertically(vertical_merge_test_pairs):
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pr1, pr2, pr_merged_expected = vertical_merge_test_pairs
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pr_merged = merge_pair_vertically(pr1, pr2)
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assert pair_equal(pr_merged, pr_merged_expected)
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def images_equal(im1: Image, im2: Image, **kwargs):
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return np.allclose(image_to_normalized_tensor(im1), image_to_normalized_tensor(im2), **kwargs)
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@pytest.fixture
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def horizontal_merge_test_pairs(horizontal_merge_test_metadata):
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images = map(random_size_gray_image_from_metadata, horizontal_merge_test_metadata)
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return list(starmap(ImageMetadataPair, zip(images, horizontal_merge_test_metadata)))
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@pytest.fixture
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def vertical_merge_test_pairs(vertical_merge_test_metadata):
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images = map(random_size_gray_image_from_metadata, vertical_merge_test_metadata)
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return list(starmap(ImageMetadataPair, zip(images, vertical_merge_test_metadata)))
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def test_merge_metadata_horizontally(horizontal_merge_test_metadata):
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mdat1, mdat2, mdat_merged = horizontal_merge_test_metadata
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assert merge_metadata_horizontally(mdat1, mdat2) == mdat_merged
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def test_merge_metadata_vertically(vertical_merge_test_metadata):
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mdat1, mdat2, mdat_merged = vertical_merge_test_metadata
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assert merge_metadata_vertically(mdat1, mdat2) == mdat_merged
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@pytest.fixture
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def horizontal_merge_test_metadata(merge_test_metadata):
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mdat1, mdat2, mdat_merged = merge_test_metadata
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mdat2[Info.X1] = mdat1[Info.X2]
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mdat2[Info.X2] = mdat2[Info.X1] + mdat2[Info.WIDTH]
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mdat_merged.update({Info.WIDTH: mdat1[Info.WIDTH] + mdat2[Info.WIDTH], Info.X2: mdat2[Info.X2]})
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return mdat1, mdat2, mdat_merged
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@pytest.fixture
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def vertical_merge_test_metadata(merge_test_metadata):
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mdat1, mdat2, mdat_merged = merge_test_metadata
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mdat2[Info.Y1] = mdat1[Info.Y2]
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mdat2[Info.Y2] = mdat2[Info.Y1] + mdat2[Info.HEIGHT]
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mdat_merged.update({Info.HEIGHT: mdat1[Info.HEIGHT] + mdat2[Info.HEIGHT], Info.Y2: mdat2[Info.Y2]})
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return mdat1, mdat2, mdat_merged
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@pytest.fixture
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def merge_test_metadata(base_patch_metadata):
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return juxt(*repeat(deepcopy, 3))(base_patch_metadata)
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@pytest.fixture
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def base_patch_image(stitch_test_pdf):
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return pdf2image.convert_from_bytes(stitch_test_pdf)[0]
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def test_concat_images_horizontally(horizontal_merge_test_metadata):
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mdat1, mdat2, mdat_merged = horizontal_merge_test_metadata
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im1, im2, im_merged_expected = map(random_size_gray_image_from_metadata, [mdat1, mdat2, mdat_merged])
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im_merged = concat_images_horizontally(im1, im2, mdat_merged)
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assert im_merged.size == im_merged_expected.size
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assert images_equal(im_merged, im_merged_expected)
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def test_concat_images_vertically(vertical_merge_test_metadata):
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mdat1, mdat2, mdat_merged = vertical_merge_test_metadata
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im1, im2, im_merged_expected = map(random_size_gray_image_from_metadata, [mdat1, mdat2, mdat_merged])
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im_merged = concat_images_vertically(im1, im2, mdat_merged)
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assert im_merged.size == im_merged_expected.size
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assert images_equal(im_merged, im_merged_expected)
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@pytest.fixture
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def stitch_test_pdf(patch_image_metadata_pairs, width, height):
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pdf = fpdf.FPDF(unit="pt", format=(width, height))
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for pair in patch_image_metadata_pairs:
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add_image(pdf, pair)
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return pdf.output(dest="S").encode("latin1")
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@pytest.fixture
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def patch_image_metadata_pairs(patches_metadata) -> List[ImageMetadataPair]:
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images = map(random_single_color_image_from_metadata, patches_metadata)
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return list(starmap(ImageMetadataPair, zip(images, patches_metadata)))
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@pytest.fixture
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def base_patch_metadata(width, height, page_width, page_height):
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metadata = get_base_position_metadata(width, height, page_width, page_height)
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metadata = merge(metadata, {Info.X1: 0, Info.Y1: 0, Info.X2: width, Info.Y2: height})
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return metadata
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@pytest.fixture
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def patches_metadata(base_patch_metadata):
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patches_metadata = list(BoxSplitter().split_box(base_patch_metadata))
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return patches_metadata
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