ag/pixelocr
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Use morphological closing along the x-axis to enhance baseline detection.

Browse source
This commit is contained in:
Andrey Golovizin 2014-08-26 17:56:34 +02:00
parent cb25753a75
commit 8bc5f06772
1 changed files with 2 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
pixelocr/page.py
View file

@ -19,7 +19,7 @@ from collections import defaultdict
import numpy as np import numpy as np
from scipy import ndimage from scipy import ndimage
from scipy.ndimage import filters from scipy.ndimage import filters, grey_closing
from .utils import cached_property, collect_iterable, pairwise, neighbourhood from .utils import cached_property, collect_iterable, pairwise, neighbourhood
from .image import Image, combine, is_nonblank from .image import Image, combine, is_nonblank
@ -158,6 +158,7 @@ class Line(PageObject):
def baseline(self): def baseline(self):
"""Detect baseline height, relative to the top.""" """Detect baseline height, relative to the top."""
bitmap = self.image.bitmap bitmap = self.image.bitmap
bitmap = grey_closing(bitmap, (0, 10), mode='constant')
histogram = bitmap.sum(axis=1) histogram = bitmap.sum(axis=1)
gradient = list(filters.correlate1d(histogram, [-1, 1], axis=0, mode='constant')) gradient = list(filters.correlate1d(histogram, [-1, 1], axis=0, mode='constant'))
gradient[0] = histogram[0] gradient[0] = histogram[0]