This appears to be an issue with --find_fonts and/or
--strip_unrenderable_words. The following command succeeds for me:
$ text2image --exposure=0 --font "Helvetica Neue Thin"
--outputbase=eng.Helvetica_Neue_Thin.exp0
--text=/Users/ryan/source/tesseract/tesseract-ocr.langdata/eng/eng.training_text
--leading=32 --char_spacing=0.0 --box_padding=0
Initializing fontconfig
Rendered page 0 to file eng.Helvetica_Neue_Thin.exp0.tif
Rendered page 1 to file eng.Helvetica_Neue_Thin.exp0.tif
-Ryan
On Tuesday, March 31, 2015 at 3:43:23 PM UTC-4, Philip Pearl wrote:
>
> Hi All
>
> I'm trying to train tesseract for the first time on my Mac. I'm running
> text2image as follows, but it is crashing in Pango as the priv data on the
> font is NULL.
>
> /usr/local/Cellar/tesseract/HEAD/bin//text2image --leading=32
> --fonts_dir=/Library/Fonts --box_padding=0 --strip_unrenderable_words
> --char_spacing=0.0 --exposure=0 --find_fonts=true
> --outputbase=/tmp/tesstrain/eng/eng.Helvetica_Neue_Thin.exp0
> --text=./tesslang/eng/eng.training_text
>
> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
>
> 0 libpangoft2-1.0.0.dylib 0x00000001090fad9e
> pango_fc_font_get_glyph + 25
>
> 1 text2image 0x000000010858bf58
> tesseract::PangoFontInfo::CanRenderString(char const*, int,
> std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >,
> std::__1::allocator<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > > >*) const + 322
>
> 2 text2image 0x000000010858d0ab
> tesseract::FontUtils::SelectFont(char const*, int,
> std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >,
> std::__1::allocator<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > > > const&,
> std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >*, std::__1::vector<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> >,
> std::__1::allocator<std::__1::basic_string<char,
> std::__1::char_traits<char>, std::__1::allocator<char> > > >*) + 287
>
> 3 text2image 0x0000000108592c06
> tesseract::StringRenderer::RenderAllFontsToImage(double, char const*, int,
> std::__1::basic_string<char, std::__1::char_traits<char>,
> std::__1::allocator<char> >*, Pix**) + 108
>
> 4 text2image 0x0000000108584149 main + 2750
>
> 5 libdyld.dylib 0x00007fff932315fd start + 1
>
>
> I installed from HEAD using homebrew and the instructions I found here
> https://ryanfb.github.io/etc/2014/11/19/installing_tesseract_training_tools_on_mac_os_x.html
>
>
> - Any ideas how to get around this crash?
> - Am I crazy running this on my Mac? Would I be better off with a
> Linux VM?
> - Does training from fonts work or am I better off starting with
> images (my data is analog HD screen captures of TV menus!)? I know the
> font
> the menus use.
>
> Thanks in advance for any help or advice you are able to give me.
>
> Phil
>
>
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