experimental polygon extraction.
git-svn-id: https://pdfminerr.googlecode.com/svn/trunk/pdfminer@166 1aa58f4a-7d42-0410-adbc-911cccaed67cpull/1/head
yusuke.shinyama.dummy
parent
665196161c
commit
6590ad42f5
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@ -19,7 +19,7 @@ Python PDF parser and analyzer
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<div align=right class=lastmod>
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<!-- hhmts start -->
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Last Modified: Sun Dec 20 00:09:12 JST 2009
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Last Modified: Sun Dec 20 01:25:02 JST 2009
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<!-- hhmts end -->
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</div>
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@ -41,7 +41,7 @@ Last Modified: Sun Dec 20 00:09:12 JST 2009
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<h2>What's It?</h2>
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<p>
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PDFMiner is a suite of programs that help
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extracting some meaningful informatin out of PDF documents.
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extracting some meaningful information out of PDF documents.
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Unlike other PDF-related tools, it focuses entirely on getting
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and analyzing text data from PDFs. PDFMiner allows to obtain
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the exact location of texts in a page, as well as
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@ -95,7 +95,7 @@ http://pdf2html.tabesugi.net:8080/
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<ol>
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<li> Install <a href="http://www.python.org/download/">Python</a> 2.4 or newer.
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<li> Download the <a href="#source">PDFMiner source</a>.
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<li> Extract it.
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<li> Unpack it.
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<li> Run <code>setup.py</code> to install:<br>
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<blockquote><pre>
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# <strong>python setup.py install</strong>
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@ -344,7 +344,7 @@ no stream header is displayed for the ease of saving it to a file.
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<hr noshade>
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<h2>Changes</h2>
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<ul>
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<li> 2009/12/19: CMap resources are now the part of the package. Thanks to Adobe for opensourcing them.
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<li> 2009/12/19: CMap resources are now the part of the package. Thanks to Adobe for open-sourcing them.
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<li> 2009/11/29: Password encryption bug fixed. Thanks to Yannick Gingras.
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<li> 2009/10/31: SGML output format is changed and renamed as XML.
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<li> 2009/10/24: Charspace bug fixed. Adjusted for 4-space indentation.
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@ -3,7 +3,7 @@ import sys
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from pdfdevice import PDFDevice, PDFTextDevice
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from pdffont import PDFUnicodeNotDefined
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from layout import LayoutContainer
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from layout import LTPage, LTText, LTLine, LTRect
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from layout import LTPage, LTText, LTLine, LTRect, LTPolygon
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from layout import LTFigure, LTTextItem, LTTextBox, LTTextLine
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from utils import enc
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from utils import apply_matrix_pt, mult_matrix
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@ -116,12 +116,7 @@ class PDFPageAggregator(PDFTextDevice):
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(_,x1,y1) = path[1]
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(x0,y0) = apply_matrix_pt(self.ctm, (x0,y0))
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(x1,y1) = apply_matrix_pt(self.ctm, (x1,y1))
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if y0 == y1:
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# horizontal ruler
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self.cur_item.add(LTLine(gstate.linewidth, 'H', (x0,y0,x1,y1)))
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elif x0 == x1:
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# vertical ruler
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self.cur_item.add(LTLine(gstate.linewidth, 'V', (x0,y0,x1,y1)))
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self.cur_item.add(LTLine(gstate.linewidth, (x0,y0), (x1,y1)))
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elif shape == 'mlllh':
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# rectangle
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(_,x0,y0) = path[0]
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@ -135,6 +130,13 @@ class PDFPageAggregator(PDFTextDevice):
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if ((x0 == x1 and y1 == y2 and x2 == x3 and y3 == y0) or
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(y0 == y1 and x1 == x2 and y2 == y3 and x3 == x0)):
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self.cur_item.add(LTRect(gstate.linewidth, (x0,y0,x2,y2)))
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else:
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# other polygon
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pts = []
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for p in path:
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for i in xrange(1, len(p), 2):
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pts.append(apply_matrix_pt(self.ctm, (p[i], p[i+1])))
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self.cur_item.add(LTPolygon(gstate.linewidth, pts))
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return
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def render_chars(self, matrix, font, fontsize, charspace, scaling, chars):
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@ -177,10 +179,12 @@ class XMLConverter(PDFConverter):
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for child in item:
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render(child)
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self.outfp.write('</page>\n')
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elif isinstance(item, LTLine):
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elif isinstance(item, LTLine) and item.direction:
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self.outfp.write('<line linewidth="%d" direction="%s" bbox="%s" />' % (item.linewidth, item.direction, item.get_bbox()))
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elif isinstance(item, LTRect):
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self.outfp.write('<rect linewidth="%d" bbox="%s" />' % (item.linewidth, item.get_bbox()))
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elif isinstance(item, LTPolygon):
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self.outfp.write('<polygon linewidth="%d" bbox="%s" pts="%s"/>' % (item.linewidth, item.get_bbox(), item.get_pts()))
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elif isinstance(item, LTFigure):
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self.outfp.write('<figure id="%s" bbox="%s">\n' % (item.id, item.get_bbox()))
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for child in item:
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@ -263,7 +267,7 @@ class HTMLConverter(PDFConverter):
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self.outfp.write('</span>\n')
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if self.debug:
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self.write_rect('red', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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elif isinstance(item, LTLine) or isinstance(item, LTRect):
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elif isinstance(item, LTPolygon):
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self.write_rect('black', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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elif isinstance(item, LTTextLine):
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for child in item:
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@ -6,6 +6,20 @@ from utils import apply_matrix_pt
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from utils import bsearch
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## get_bounds
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##
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def get_bounds(pts):
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"""Compute a maximal rectangle that covers all the points."""
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(x0, y0, x1, y1) = (INF, INF, -INF, -INF)
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for (x,y) in pts:
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x0 = min(x0, x)
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y0 = min(y0, y)
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x1 = max(x1, x)
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y1 = max(y1, y)
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return (x0,y0,x1,y1)
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## LAParams
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##
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class LAParams(object):
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@ -228,24 +242,44 @@ class LayoutContainer(LayoutItem):
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return None
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## LTPolygon
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##
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class LTPolygon(LayoutItem):
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def __init__(self, linewidth, pts):
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LayoutItem.__init__(self, get_bounds(pts))
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self.pts = pts
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self.linewidth = linewidth
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return
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def get_pts(self):
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return ','.join( '%.3f,%.3f' % p for p in self.pts )
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## LTLine
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##
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class LTLine(LayoutItem):
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class LTLine(LTPolygon):
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def __init__(self, linewidth, direction, bbox):
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LayoutItem.__init__(self, bbox)
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self.linewidth = linewidth
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self.direction = direction
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def __init__(self, linewidth, p0, p1):
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(x0,y0) = p0
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(x1,y1) = p0
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self.direction = None
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if y0 == y1:
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# horizontal ruler
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self.direction = 'H'
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elif x0 == x1:
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# vertical ruler
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self.direction = 'V'
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LTPolygon.__init__(self, linewidth, [p0, p1])
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return
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## LTRect
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##
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class LTRect(LayoutItem):
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class LTRect(LTPolygon):
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def __init__(self, linewidth, bbox):
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LayoutItem.__init__(self, bbox)
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self.linewidth = linewidth
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def __init__(self, linewidth, (x0,y0,x1,y1)):
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LTPolygon.__init__(self, linewidth, [(x0,y0), (x1,y0), (x1,y1), (x0,y1)])
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return
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@ -339,15 +373,8 @@ class LTFigure(LayoutContainer):
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def __init__(self, id, bbox, matrix):
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(x,y,w,h) = bbox
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x0 = y0 = INF
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x1 = y1 = -INF
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for (p,q) in ((x,y),(x+w,y),(x,y+h),(x+w,y+h)):
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(p,q) = apply_matrix_pt(matrix, (p,q))
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x0 = min(x0, p)
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x1 = max(x1, p)
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y0 = min(y0, q)
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y1 = max(y1, q)
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bbox = (x0,y0,x1,y1)
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bbox = get_bounds( apply_matrix_pt(matrix, (p,q))
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for (p,q) in ((x,y), (x+w,y), (x,y+h), (x+w,y+h)) )
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self.matrix = matrix
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LayoutContainer.__init__(self, id, bbox)
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return
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@ -518,7 +518,7 @@ class PDFCIDFont(PDFFont):
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try:
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self.unicode_map = CMapDB.get_unicode_map(self.cidcoding, self.cmap.is_vertical())
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except CMapDB.CMapNotFound, e:
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raise PDFFontError(e)
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pass
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def get_width(seq):
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dic = {}
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