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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2016/09/15 16:27:20 UTC
[jira] [Resolved] (PDFBOX-3498) Unexpected spaces in text
extraction
[ https://issues.apache.org/jira/browse/PDFBOX-3498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tilman Hausherr resolved PDFBOX-3498.
-------------------------------------
Resolution: Fixed
Fix Version/s: 2.1.0
> Unexpected spaces in text extraction
> ------------------------------------
>
> Key: PDFBOX-3498
> URL: https://issues.apache.org/jira/browse/PDFBOX-3498
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 2.0.2, 2.0.3
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Fix For: 2.0.4, 2.1.0
>
> Attachments: PDFBOX-3498-Y5TLCWTIAE3FYDVJTV2TXRZGXLEDUNSW.pdf
>
>
> In the tests by [~tallison@apache.org] regressions were found with files from Delaware courts, see reduced file attached.
> The extracted text with 2.0.2 and 2.0.3 is
> {code}
> IN THE COUR T OF CHAN CER Y O F TH E STA TE OF D ELA WARE
> {code}
> in 2.0.1 and 1.8 it was
> {code}
> IN THE COURT OF CHANCERY OF THE STATE OF DELAWARE
> {code}
> The cause is the /W ranges table:
> {code}
> /W [1 1 0 2 3 250 4 10 0 11
> 12 333 13 14 0 15 15 250 16 16
> 333 17 17 250 18 18 277 19 19 0
> 20 23 500 24 35 0 36 36 722 37
> 37 666 38 39 722 40 40 666 41 41
> 610 42 43 777 44 44 389 45 45 0
> 46 46 777 47 47 666 48 48 943 49
> 49 722 50 50 777 51 51 610 52 52
> 0 53 53 722 54 54 556 55 55 666
> 56 57 722 59 59 0 60 60 722 61
> 67 0 68 68 500 69 69 556 70 70
> 443 71 71 556 72 72 443 73 73 333
> 74 74 500 75 75 556 76 76 277 77
> 77 0 78 78 556 79 79 277 80 80
> 833 81 81 556 82 82 500 83 84 556
> 85 85 443 86 86 389 87 87 333 88
> 88 556 89 89 0 90 90 722 91 92
> 500 93 178 0 179 180 500 181 181 0
> 182 182 333 183 751 0 752 752 198 753
> 794 0 795 795 612 796 1126 0 1127 1127
> 125 1129 1129 2000 1130 65534 0]
> {code}
> For text extraction, the width of a space is caculated by taking an average of all widths. However these files have a lot (over 60000) of widths that are 0. So I'll just ignore widths <= 0, as it is already done in PDFont.
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