[Tex/LaTex] wrong with the dsfont package

fonts

I have never had problems with the package dsfont before. But suddenly in all my documents (independent of the combination of \usepackages in the preamble) the dsfonts look very poor in the PDF. They have bad quality and look pixelated. I have no idea what happened here. Also the minimal working example below gives me a PDF that looks awful.

\documentclass{article}
\usepackage{dsfont}
\begin{document}
\[\mathds{N}=\{0,1,2,\ldots\}\]
\[\mathds{ABCDEFGHIJKLMNOPQRSTUVWXYZ}\]
\end{document}

enter image description here

C:\Users\cala>updmap --verbose
Parsing config file "C:\Program Files\MiKTeX 2.9\miktex\config\updmap.cfg"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\tetex\dvips35.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\tetex\pdftex35.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\tetex\dvipdfm35.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\tetex\ps2pk35.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\cm.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\cmextra.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\cyrillic.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\euler.map"...
Parsing "C:\Program Files\MiKTeX 2.9\dvips\eurosym\eurosym.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\latxfont.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\mflogo-font\mflogo.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\rsfs\rsfs.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\amsfonts\symbols.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\xypic\xypic.map"...
Parsing C:\Users\cala\AppData\Roaming\MiKTeX\2.9\fonts\map\dvips\arabi\arabi.map...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\psnfss\charter.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\psnfss\fpls.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\lm\lm.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\psnfss\pazo.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\pslatex\pcrr8rn.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\psnfss\psnfss.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\avantgar\uag.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\bookman\ubk.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\courier\ucr.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\helvetic\uhv.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\ncntrsbk\unc.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\palatino\upl.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\times\utm.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\psnfss\utopia.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\zapfchan\uzc.map"...
Parsing "C:\Program Files\MiKTeX 2.9\fonts\map\dvips\zapfding\uzd.map"...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\ps2pk.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\download35.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\builtin35.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\psfonts_t1.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\psfonts_pk.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\pdftex\config\pdftex_ndl14.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\pdftex\config\pdftex_dl14.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvipdfm\config\dvipdfm_dl14.map...
Writing C:\Users\cala\AppData\Local\MiKTeX\2.9\dvipdfm\config\dvipdfm_ndl14.map...
Copying C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\psfonts_t1.map
to C:\Users\cala\AppData\Local\MiKTeX\2.9\dvips\config\psfonts.map...
Copying C:\Users\cala\AppData\Local\MiKTeX\2.9\dvipdfm\config\dvipdfm_dl14.map
to C:\Users\cala\AppData\Local\MiKTeX\2.9\dvipdfm\config\dvipdfm.map...
Copying C:\Users\cala\AppData\Local\MiKTeX\2.9\pdftex\config\pdftex_dl14.map
to C:\Users\cala\AppData\Local\MiKTeX\2.9\pdftex\config\pdftex.map...
C:\Users\cala>updmap

Best Answer

The problem comes from a wrong installation of dstroke.map: it is installed in MiKTeX 2.9\fonts\dvips\doublestroke, and it it should be in MiKTeX 2.9\fonts\map\dvips\doublestroke.

Solution: move the whole directory doublestroke\ to the correct place MiKTeX 2.9\fonts\map\dvips\. Then launch MiKTeX Settings to refresh the FNDB, and runupdmap` (as Administrator).

Here is what I obtained afterwards:

enter image description here