Marmelator/image-classification-service
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topological sorting of definitions by caller hierarchy

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This commit is contained in:
Matthias Bisping 2022-04-11 16:08:54 +02:00
parent bb79f9dd55
commit 3d335783dc
1 changed files with 62 additions and 61 deletions
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123
image_prediction/image_extractor/extractors/parsable.py
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@ -12,7 +12,67 @@ from image_prediction.image_extractor.extractor import ImageExtractor, ImageMeta
from image_prediction.info import Info
from image_prediction.stitching.stitching import stitch_pairs
rounder = rcompose(round, int)
class ParsablePDFImageExtractor(ImageExtractor):
def __init__(self, verbose=False):
self.doc: fitz.fitz.Document = None
self.verbose = verbose
def extract(self, pdf: bytes, page_range: range = None):
self.doc = fitz.Document(stream=pdf)
pages = extract_pages(self.doc, page_range) if page_range else self.doc
image_metadata_pairs = chain.from_iterable(
map(
self.__process_images_on_page,
tqdm(pages, desc="Extracting", disable=not self.verbose, total=len(page_range) if page_range else None),
)
)
return image_metadata_pairs
def __process_images_on_page(self, page: fitz.fitz.Page):
images = get_images_on_page(self.doc, page)
metadata = get_metadata_for_images_on_page(page)
get_image_infos.cache_clear()
image_metadata_pairs = starmap(
ImageMetadataPair, filter(compose(all, curry(map)(truth)), zip(images, metadata))
)
image_metadata_pairs = stitch_pairs(list(image_metadata_pairs))
return image_metadata_pairs
def extract_pages(doc, page_range):
page_range = range(page_range.start + 1, page_range.stop + 1)
pages = map(doc.load_page, page_range)
return pages
def get_images_on_page(doc, page: fitz.Page):
image_infos = get_image_infos(page)
xrefs = map(itemgetter("xref"), image_infos)
images = map(partial(load_image_from_xref, doc), xrefs)
return images
def get_metadata_for_images_on_page(page: fitz.Page):
image_infos = get_image_infos(page)
metadata = map(get_image_metadata, image_infos)
metadata = map(partial(merge, get_page_metadata(page)), metadata)
return metadata
def load_image_from_xref(doc, xref):
maybe_image = doc.extract_image(xref)
return Image.open(io.BytesIO(maybe_image["image"])) if maybe_image else None
@lru_cache(maxsize=None)
def get_image_infos(page: fitz.Page):
return page.get_image_info(xrefs=True)
def get_image_metadata(image_info):
@ -38,63 +98,4 @@ def get_page_metadata(page):
}
def extract_pages(doc, page_range):
page_range = range(page_range.start + 1, page_range.stop + 1)
pages = map(doc.load_page, page_range)
return pages
def load_image_from_xref(doc, xref):
maybe_image = doc.extract_image(xref)
return Image.open(io.BytesIO(maybe_image["image"])) if maybe_image else None
@lru_cache(maxsize=None)
def get_image_infos(page: fitz.Page):
return page.get_image_info(xrefs=True)
def get_images_on_page(doc, page: fitz.Page):
image_infos = get_image_infos(page)
xrefs = map(itemgetter("xref"), image_infos)
images = map(partial(load_image_from_xref, doc), xrefs)
return images
def get_metadata_for_images_on_page(page: fitz.Page):
image_infos = get_image_infos(page)
metadata = map(get_image_metadata, image_infos)
metadata = map(partial(merge, get_page_metadata(page)), metadata)
return metadata
class ParsablePDFImageExtractor(ImageExtractor):
def __init__(self, verbose=False):
self.doc: fitz.fitz.Document = None
self.verbose = verbose
def __process_images_on_page(self, page: fitz.fitz.Page):
images = get_images_on_page(self.doc, page)
metadata = get_metadata_for_images_on_page(page)
get_image_infos.cache_clear()
image_metadata_pairs = starmap(
ImageMetadataPair, filter(compose(all, curry(map)(truth)), zip(images, metadata))
)
image_metadata_pairs = stitch_pairs(list(image_metadata_pairs))
return image_metadata_pairs
def extract(self, pdf: bytes, page_range: range = None):
self.doc = fitz.Document(stream=pdf)
pages = extract_pages(self.doc, page_range) if page_range else self.doc
image_metadata_pairs = chain.from_iterable(
map(
self.__process_images_on_page,
tqdm(pages, desc="Extracting", disable=not self.verbose, total=len(page_range) if page_range else None),
)
)
return image_metadata_pairs
rounder = rcompose(round, int)