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

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Andrey Golovizin 2014-08-26 17:56:34 +02:00
parent cb25753a75
commit 8bc5f06772
1 changed files with 2 additions and 1 deletions
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3
pixelocr/page.py
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@ -19,7 +19,7 @@ from collections import defaultdict
import numpy as np
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 .image import Image, combine, is_nonblank
@ -158,6 +158,7 @@ class Line(PageObject):
def baseline(self):
"""Detect baseline height, relative to the top."""
bitmap = self.image.bitmap
bitmap = grey_closing(bitmap, (0, 10), mode='constant')
histogram = bitmap.sum(axis=1)
gradient = list(filters.correlate1d(histogram, [-1, 1], axis=0, mode='constant'))
gradient[0] = histogram[0]