fix: coordinate remapping
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iriley
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@ -1,5 +1,5 @@
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# cv-analysis — Visual (CV-Based) Document Parsing
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parse_pdf()
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This repository implements computer vision based approaches for detecting and parsing visual features such as tables or
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previous redactions in documents.
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@ -2,14 +2,17 @@ import json
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from cv_analysis.server.pipeline import make_image_analysis_pipeline
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from cv_analysis.table_inference import infer_lines
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from cv_analysis.utils.annotate import annotate_pdf
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pipe = make_image_analysis_pipeline(infer_lines)
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# FIXME: Implement argparsing
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pdf_bytes = open("/home/junverfehrt/Documents/rosario_test_file.pdf", "rb").read()
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vlp_output = json.load(open("/home/junverfehrt/Documents/rosario_test_file_vlp.json", "r"))
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pdf_bytes = open("test/test_data/article.pdf", "rb").read()
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vlp_output = json.load(open("test/test_data/article.json", "r"))
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best_result = list(pipe(data={"pdf": pdf_bytes, "vlp_output": vlp_output}))
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print(best_result)
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# print(best_result)
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annotate_pdf(pdf_bytes, best_result, output_path = "/tmp/deine-mutter.pdf")
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@ -1,5 +1,5 @@
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from dataclasses import asdict
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from operator import truth
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from operator import itemgetter, truth
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from typing import Generator, Callable
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from funcy import flatten, lmap
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@ -46,8 +46,15 @@ def make_image_analysis_pipeline(
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pdf_bytes = data["pdf"]
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vlp_output = data["vlp_output"]
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images, info, page_info = extract_images_from_pdf(pdf_bytes, vlp_output)
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# rel_bboxes = map()
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img_results = lmap(analysis_fn, images)
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img_results = lmap(transform_table_lines_by_page_info, img_results, page_info)
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def make_offsets():
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...
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offsets = map(itemgetter("x1", "y2"), map(itemgetter("bbox"), info))
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# print("before", img_results)
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img_results = lmap(transform_table_lines_by_page_info, img_results, offsets, page_info)
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# print("after", img_results)
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results = map(lambda i: info[i] | img_results[i], range(len(info)))
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yield from results
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@ -124,14 +124,15 @@ FILTERS = {
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def get_lines_either(table_array: Array, horizontal=True) -> Array:
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key = "row" if horizontal else "col"
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THRESHOLD = 0.3
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THRESHOLD = 0.4
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filters = FILTERS
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sums = np.mean(table_array, axis=int(horizontal))
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sums = np.maximum(sums, (sums < THRESHOLD))
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# save_plot(rows, name=save_path / "rows", title="raw row averages")
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filtered_sums = filter_array(sums, FILTERS[key][1]) # ROW_FILTER1)
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filtered_sums = filter_array(sums, FILTERS[key][2]) # ROW_FILTER2)
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if not horizontal:
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filtered_sums = filter_array(filtered_sums, FILTERS[key][2]) # ROW_FILTER2)
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lines = argrelextrema(filtered_sums, np.greater)[0]
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return lines
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@ -142,6 +143,7 @@ def img_bytes_to_array(img_bytes: bytes) -> Array:
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def infer_lines(img: Array) -> dict[str, list[dict[str, int]]]:
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# cv2.GaussianBlur(img,(15,5),cv2.BORDER_DEFAULT)
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h, w = map(int, img.shape)
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row_vals = map(int, get_lines_either(img, horizontal=True))
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col_vals = map(int, get_lines_either(img, horizontal=False))
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@ -7,29 +7,32 @@ import fitz
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from kn_utils.logging import logger
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def annotate_pdf(pdf: Union[str, bytes, Path], predictions, output_path: Union[str, Path] = None):
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def annotate_pdf(pdf: Union[str, bytes, Path], annotations, output_path: Union[str, Path] = None):
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pdf_bytes = provide_byte_stream(pdf)
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with fitz.open(stream=pdf_bytes) as pdf_handle:
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for prediction in predictions:
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for page_annotations in annotations:
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# FIXME: Adapt to line drawing
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index = prediction["page_idx"]
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annotate_page(pdf_handle[index], prediction)
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index = page_annotations["pageNum"]
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annotate_page(pdf_handle[index], page_annotations)
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output_path = output_path or "/tmp/annotated.pdf"
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pdf_handle.save(output_path)
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logger.info(f"Annotated PDF saved to {output_path}")
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def annotate_page(page: fitz.Page, prediction):
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for box in prediction["boxes"]:
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bbox = itemgetter("x1", "y1", "x2", "y2")(box["box"])
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label, probability, uuid = itemgetter("label", "probability", "uuid")(box)
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bbox = mirror_on_x_axis(bbox, page.bound().height)
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x0, y0, x1, y1 = bbox
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page.draw_rect(fitz.Rect(x0, y0, x1, y1), color=(0, 0, 1), width=2)
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label_x, label_y = x0, y0 - 5
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page.insert_text((label_x, label_y), f"{label} ({probability:.2f}), {uuid}", fontsize=12, color=(0.4, 0.4, 1))
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# for box in prediction["boxes"]:
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# bbox = itemgetter("x1", "y1", "x2", "y2")(box["box"])
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# label, probability, uuid = itemgetter("label", "probability", "uuid")(box)
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# bbox = mirror_on_x_axis(bbox, page.bound().height)
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# x0, y0, x1, y1 = bbox
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# page.draw_rect(fitz.Rect(x0, y0, x1, y1), color=(0, 0, 1), width=2)
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# label_x, label_y = x0, y0 - 5
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# page.insert_text((label_x, label_y), f"{label} ({probability:.2f}), {uuid}", fontsize=12, color=(0.4, 0.4, 1))
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for line in prediction["tableLines"]:
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start = itemgetter("x1", "y1")(line)
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end = itemgetter("x2", "y2")(line)
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page.draw_line(start, end)
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return page
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@ -1,6 +1,11 @@
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import os
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import cv2
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from matplotlib import pyplot as plt
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if os.environ["USER"] == "isaac":
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import matplotlib
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matplotlib.use('module://matplotlib-backend-wezterm')
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def show_image_cv2(image, maxdim=700):
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h, w, c = image.shape
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@ -6,9 +6,11 @@ from typing import Tuple
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import fitz
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import numpy as np
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from funcy import compose
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from funcy import compose, lfilter
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from numpy import ndarray as Array
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from kn_utils.logging import logger
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@dataclass
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class PageInfo:
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@ -16,6 +18,11 @@ class PageInfo:
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rotation_matrix: fitz.Matrix
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transformation_matrix: fitz.Matrix
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dpi: int
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width: int | float
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height: int | float
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image_width: int | float
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image_height: int | float
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rotation: int
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def transform_image_coordinates_to_pdf_coordinates(
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@ -28,22 +35,58 @@ def transform_image_coordinates_to_pdf_coordinates(
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return rect.x0, rect.y0, rect.x1, rect.y1
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def transform_table_lines_by_page_info(bboxes: dict, page_info: PageInfo) -> dict:
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def rescale_to_pdf(bbox: Iterable[int | float], page_info: PageInfo) -> Iterable[float]:
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pdf_h, pdf_w = page_info.height, page_info.width
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if page_info.rotation in {90, 270}:
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pdf_h, pdf_w = pdf_w, pdf_h
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pix_h, pix_w = page_info.image_height, page_info.image_width
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ratio_h, ratio_w = pdf_h / pix_h, pdf_w / pix_w
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round3 = lambda x: tuple(map(lambda y: round(y, 3), x))
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ratio_w, ratio_h, pdf_w, pdf_h, pix_w, pix_h = round3((ratio_w, ratio_h, pdf_w, pdf_h, pix_w, pix_h))
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new_bbox = round3((bbox[0] * ratio_w, bbox[1] * ratio_h, bbox[2] * ratio_w, bbox[3] * ratio_h))
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# logger.info(f"{pdf_h=}, {pix_h=}, {pdf_w=}, {pix_w=}, {ratio_w=}, {ratio_h=}")
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# logger.info(round3(bbox))
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# logger.info(new_bbox)
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return new_bbox
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def transform_table_lines_by_page_info(bboxes: dict, offsets: tuple, page_info: PageInfo) -> dict:
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# FIXME: Also convert image info? Is image info necessary?
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# Also, the resulting lines are not in the table bbox, is this okay?
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transform = partial(
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transform_image_coordinates_to_pdf_coordinates,
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rotation_matrix=page_info.rotation_matrix,
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transformation_matrix=page_info.transformation_matrix,
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dpi=page_info.dpi,
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)
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# transform = partial(
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# transform_image_coordinates_to_pdf_coordinates,
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# rotation_matrix=page_info.rotation_matrix,
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# transformation_matrix=page_info.transformation_matrix,
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# dpi=page_info.dpi,
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# )
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transform = partial(rescale_to_pdf, page_info=page_info)
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logger.info(f"{offsets=}")
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def apply_offsets(line: tuple) -> tuple:
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x1, y1, x2, y2 = line
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offset_x, offset_y = offsets
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offset_y = page_info.height - offset_y # - (y2 * (y1 != y2))
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logger.info((f"new offsets: {offset_x}, {offset_y}"))
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return (x1 + offset_x, y1 + offset_y, x2 + offset_x, y2 + offset_y)
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unpack = itemgetter("x1", "y1", "x2", "y2")
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pack = lambda x: {"x1": x[0], "y1": x[1], "x2": x[2], "y2": x[3]}
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convert = compose(pack, transform, unpack)
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# convert = compose(pack, transform, apply_offsets, unpack)
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convert = compose(pack, apply_offsets, transform, unpack)
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# convert = compose(pack, transform, unpack)
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table_lines = bboxes.get("tableLines", [])
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transformed_lines = list(map(convert, table_lines))
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bboxes["tableLines"] = transformed_lines
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bboxes["tableLines"] = transformed_lines #lfilter(lambda b: b['y1']==b['y2'], transformed_lines)
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import json
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for i in range(len(table_lines)):
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logger.info(json.dumps(table_lines[i], indent=4))
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logger.info(json.dumps(transformed_lines[i], indent=4))
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logger.info('')
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# exit()
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return bboxes
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@ -64,8 +107,20 @@ def extract_images_from_pdf(
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boxes = filter(lambda box_obj: box_obj["label"] == "table", boxes)
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page = fh[page_num] # pages[int(page_num)]
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page.wrap_contents()
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# TODO: Workaround to be able to transform the image coordinates to pdf coordinates in a later step.
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current_page_info = PageInfo(page_num, page.rotation_matrix, page.transformation_matrix, dpi)
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page_image = page.get_pixmap(dpi=200)
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# import IPython; IPython.embed()
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current_page_info = PageInfo(
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page_num,
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page.rotation_matrix,
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page.transformation_matrix,
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dpi,
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*page.rect[-2:],
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page_image.w,
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page_image.h,
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page.rotation,
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)
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for box_obj in boxes:
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bbox = box_obj["box"]
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