refactoring

This commit is contained in:
Matthias Bisping 2022-02-06 14:47:18 +01:00
parent 9d30009dce
commit d9567da428
3 changed files with 58 additions and 57 deletions

View File

@ -6,11 +6,11 @@ from vidocp.utils import (
show_mpl,
draw_rectangles,
remove_included,
remove_primary_text_regions,
detect_large_coherent_structures,
is_large_enough,
has_acceptable_format,
)
from vidocp.utils.text import remove_primary_text_regions
def is_likely_figure(cont, min_area=5000, max_width_to_hight_ratio=6):

57
vidocp/utils/text.py Normal file
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@ -0,0 +1,57 @@
import cv2
def remove_primary_text_regions(image):
"""Removes regions of primary text, meaning no figure descriptions for example, but main text body paragraphs.
Args:
image: Image to remove primary text from.
Returns:
Image with primary text removed.
"""
image = image.copy()
cnts = find_primary_text_regions(image)
for cnt in cnts:
x, y, w, h = cv2.boundingRect(cnt)
cv2.rectangle(image, (x, y), (x + w, y + h), (255, 255, 255), -1)
return image
def find_primary_text_regions(image):
"""Finds regions of primary text, meaning no figure descriptions for example, but main text body paragraphs.
Args:
image: Image to remove primary text from.
Returns:
Image with primary text removed.
References:
https://stackoverflow.com/questions/58349726/opencv-how-to-remove-text-from-background
"""
def is_likely_primary_text_segments(cnt):
return 800 < cv2.contourArea(cnt) < 15000
image = image.copy()
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
thresh = cv2.threshold(gray, 253, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]
close_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (20, 3))
close = cv2.morphologyEx(thresh, cv2.MORPH_CLOSE, close_kernel, iterations=1)
dilate_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (5, 3))
dilate = cv2.dilate(close, dilate_kernel, iterations=1)
cnts, _ = cv2.findContours(dilate, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
cnts = filter(is_likely_primary_text_segments, cnts)
return cnts

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@ -144,62 +144,6 @@ def vec_rect_to_xywh(rect):
return x, y, w, h
def find_primary_text_regions(image):
"""Finds regions of primary text, meaning no figure descriptions for example, but main text body paragraphs.
Args:
image: Image to remove primary text from.
Returns:
Image with primary text removed.
References:
https://stackoverflow.com/questions/58349726/opencv-how-to-remove-text-from-background
"""
def is_likely_primary_text_segments(cnt):
return 800 < cv2.contourArea(cnt) < 15000
image = image.copy()
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
thresh = cv2.threshold(gray, 253, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]
close_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (20, 3))
close = cv2.morphologyEx(thresh, cv2.MORPH_CLOSE, close_kernel, iterations=1)
dilate_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (5, 3))
dilate = cv2.dilate(close, dilate_kernel, iterations=1)
cnts, _ = cv2.findContours(dilate, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
cnts = filter(is_likely_primary_text_segments, cnts)
return cnts
def remove_primary_text_regions(image):
"""Removes regions of primary text, meaning no figure descriptions for example, but main text body paragraphs.
Args:
image: Image to remove primary text from.
Returns:
Image with primary text removed.
"""
image = image.copy()
cnts = find_primary_text_regions(image)
for cnt in cnts:
x, y, w, h = cv2.boundingRect(cnt)
cv2.rectangle(image, (x, y), (x + w, y + h), (255, 255, 255), -1)
return image
def detect_large_coherent_structures(image: np.array):
"""Detects large coherent structures on an image.