Python Pillow Convert PNG to EPS: A Completed Guide – Pillow Tutorial

By | August 30, 2020

EPS format images are common used in latex, however, images we often create are png. In this tutorial, we will introduce how to convert png images to eps format using python pillow.

Preliminary

To convert png images to eps, we should be sure the mode of png image is L, LAB, RGB and CMYK. Otherwise, we will get an ValueError: image mode is not supported. To fix this error, you can read this turorial.

Fix Pillow Convert Images to EPS ValueError: image mode is not supported

Import pillow library

from PIL import Image

Check the image mode of png image

We should check the image mode of png and make it can be converted to eps.

image_png = 'logo.png'

im = Image.open(image_png)
print(im.mode)

The resout is:RGBA, which can not be read by pillow.

Convert png image mode

We should convert current png mode to L, LAB, RGB or CMYK.

For example, if we convert RGBA to RGB, we can do like this:

fig = im.convert('RGB')

Convert png to eps

After converting png image mode, we can convert current png image to eps by pillow.

fig.save('logo-RGB.eps', lossless = True)

We also can convert RGBA to other mode, here is all effect. Because RGBA can not be converted to LAB, so we do not show it.

pillow convert png to eps examples

From the effect,we can find mode L will change the color of original png files.

Compare file size of different mode eps file

Here is result:

pillow convert png to eps file size

From the result, we can find converting png to eps with CMYK mode will get the biggest file size and model L is smallest.

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