e7b28f5bda
Merge in RR/cv-analysis from remove_pil to master
Squashed commit of the following:
commit 83c8d88f3d48404251470176c70979ee75ae068b
Author: Julius Unverfehrt <julius.unverfehrt@iqser.com>
Date: Thu Jul 21 10:51:51 2022 +0200
remove deprecated server tests
commit cebc03b5399ac257a74036b41997201f882f5b74
Author: Julius Unverfehrt <julius.unverfehrt@iqser.com>
Date: Thu Jul 21 10:51:08 2022 +0200
remove deprecated server tests
commit ce2845b0c51f001b7b5b8b195d6bf7e034ec4e39
Author: Julius Unverfehrt <julius.unverfehrt@iqser.com>
Date: Wed Jul 20 17:05:00 2022 +0200
repair tests to work without pillow WIP
commit 023fdab8322f28359a24c63e32635a3d0deccbe4
Author: Isaac Riley <Isaac.Riley@iqser.com>
Date: Wed Jul 20 16:40:36 2022 +0200
fixed typo
commit 33850ca83a175f74789ae6b9bebd057ed84b7fb3
Author: Isaac Riley <Isaac.Riley@iqser.com>
Date: Wed Jul 20 16:38:37 2022 +0200
fixed import from refactored open_img.py
commit dbc6d345f074e538948e2c4f94ebed8a5ef520bc
Author: Isaac Riley <Isaac.Riley@iqser.com>
Date: Wed Jul 20 16:32:42 2022 +0200
removed PIL from production code, now inly in scripts
43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
from functools import partial
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import cv2
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import numpy as np
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import pdf2image
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from iteration_utilities import starfilter, first
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from cv_analysis.utils.filters import is_large_enough, is_filled, is_boxy
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from cv_analysis.utils.visual_logging import vizlogger
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def is_likely_redaction(contour, hierarchy, min_area):
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return is_filled(hierarchy) and is_boxy(contour) and is_large_enough(contour, min_area)
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def find_redactions(image: np.array, min_normalized_area=200000):
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vizlogger.debug(image, "redactions01_start.png")
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min_normalized_area /= 200 # Assumes 200 DPI PDF -> image conversion resolution
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if len(image.shape) > 2:
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gray = ~cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
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else:
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gray = ~image
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vizlogger.debug(gray, "redactions02_gray.png")
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blurred = cv2.GaussianBlur(gray, (5, 5), 1)
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vizlogger.debug(blurred, "redactions03_blur.png")
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thresh = cv2.threshold(blurred, 252, 255, cv2.THRESH_BINARY)[1]
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vizlogger.debug(blurred, "redactions04_threshold.png")
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contours, hierarchies = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_NONE)
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try:
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contours = map(
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first,
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starfilter(
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partial(is_likely_redaction, min_area=min_normalized_area),
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zip(contours, hierarchies[0]),
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),
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)
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return list(contours)
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except:
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return []
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