CODEWITHSUNDEEP
matplotlibpdfinkscapefile-conversioneps
Wolpertinger
Wolpertinger

Reputation: 1301

Inkscape PDF to eps conversion with matplotlib generated font

I usually create figures using matplotlib. Here is a minimal working example:

def cm2inch(*tupl):
    inch = 2.54
    if isinstance(tupl[0], tuple):
        return tuple(i/inch for i in tupl[0])
    else:
        return tuple(i/inch for i in tupl)

# matplotlib settings
import matplotlib as mpl
import matplotlib.pyplot as plt
import matplotlib.colors as colors
from matplotlib.patches import Ellipse, Rectangle
import matplotlib.patches as patches
import numpy as np

plt.rc('text', usetex=True)
plt.rc('font',**{'family':'serif','serif':['Times New Roman']})
params = {'text.latex.preamble' : [r'\usepackage{amssymb}', r'\usepackage{amsmath}']}
plt.rcParams.update(params)

figW = 17.9219/2
figH = 3.5*2.0
fig = plt.figure(figsize=cm2inch((figW, figH)))

x = np.linspace(0.001, 15., 500)

ax1 = fig.add_axes([0.1, 0.1, 0.8, 0.8],
                    xlabel=r"x-axis",ylabel=r"y-axis")
xr_ = 0.5
ax1.axvspan(5-xr_, 5+xr_, color='C1', alpha=0.2, linewidth=0)
ax1.plot(x, 0.05*(x-5)**2, 'C0', label='cool plot')
ax1.axvline(5, color='C3', dashes=[4,2], lw=1.0)

ax1.legend(fontsize=6, loc=1)
ax1.set_xlim([0, 14.5])
ax1.set_ylim([0,1.1])

ax1.set_xticks([])
ax1.set_xticklabels([])
ax1.set_yticks([0, 1.0])
ax1.set_yticklabels([0, 1])
ax1.tick_params(axis="y",direction="in")
ax1.tick_params(axis="x",direction="in")

yshift_ = 0.1
yshift_2 = 0.3
ax1.text(2*5-2.5, 0.48+yshift_2, r"value", fontsize=8, color='C3', ha='center')

fig.savefig('input.pdf', dpi=1000)
plt.show()

Output (saved as png instead of pdf):

enter image description here

I then want to convert the generated pdf to eps (note that I do not want to create a eps directly, for workflow related reasons).

I have read the following post: High quality pdf to eps. Unfortunately, I cannot use the Ghostscript conversion option due to the transparency in the pdf (as pointed out by KenS in Converting pdf to eps without rasterizing or changing fonts), since the image is then rasterized.

However, Inkscape seems to be able to deal with the transparency without rasterizing the image. The command

inkscape input.pdf --export-filename=output.eps

almost does the job. The problem is that Inkscape seems to be unable to recognize the matplotlib generated Times New Roman font. The output is instead:

enter image description here

Is there any way to teach Inkscape to convert the Times New Roman font created by matplotlib correctly?

Additional info: I am using Mac OS and I do have Times New Roman installed according to the Font Book.

Upvotes: 2

Views: 266

Answers (1)

s.ouchene
s.ouchene

Reputation: 1869

You can use poppler library to import the pdf by using the --pdf-poppler option. However, that will convert text to paths.

So you can try with the following command:

inkscape input.pdf --pdf-poppler  --export-filename=output.eps

Upvotes: 1

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