Saving images in Python at a very high quality

Question

How can I save Python plots at very high quality  That is  when I keep zooming in on the object saved in a PDF file  why isn t there any blurring  Also  what would be the best mode to save it in  png  eps  Or some other  I can t do pdf  because there is a hidden number that happens that mess with Latexmk compilation

User · Accepted Answer

If you are using Matplotlib and are trying to get good figures in a LaTeX document, save as an EPS. Specifically, try something like this after running the commands to plot the image:

plt.savefig('destination_path.eps', format='eps')

I have found that EPS files work best and the dpi parameter is what really makes them look good in a document.

To specify the orientation of the figure before saving, simply call the following before the plt.savefig call, but after creating the plot (assuming you have plotted using an axes with the name ax):

ax.view_init(elev=elevation_angle, azim=azimuthal_angle)

Where elevation_angle is a number (in degrees) specifying the polar angle (down from vertical z axis) and the azimuthal_angle specifies the azimuthal angle (around the z axis).

I find that it is easiest to determine these values by first plotting the image and then rotating it and watching the current values of the angles appear towards the bottom of the window just below the actual plot. Keep in mind that the x, y, z, positions appear by default, but they are replaced with the two angles when you start to click+drag+rotate the image.

User · Answer

Just to add my results  also using Matplotlib   eps made all my text bold and removed transparency   svg gave me high-resolution pictures that actually looked like my graph  import matplotlib pyplot as plt fig  ax   plt subplots     Do the plot code fig savefig  myimage svg   format  svg   dpi 1200   I used 1200 dpi because a lot of scientific journals require images in 1200   600   300 dpi  depending on what the image is of  Convert to desired dpi and format in GIMP or Inkscape  Obviously the dpi doesn t matter since  svg are vector graphics and have  quot infinite resolution quot

User · Answer

You can save to a figure that is 1920x1080  or 1080p  using   fig   plt figure figsize  19 20 10 80     You can also go much higher or lower  The above solutions work well for printing  but these days you want the created image to go into a PNG JPG or appear in a wide screen format

User · Answer

In case you are working with seaborn plots  instead of Matplotlib  you can save a  png image like this  Let s suppose you have a matrix object  either Pandas or NumPy   and you want to take a heatmap  import seaborn as sb  image   sb heatmap matrix      This gets you the heatmap image figure savefig  quot C  Your Path       your image png quot       This saves it  This code is compatible with the latest version of Seaborn  Other code around Stack Overflow worked only for previous versions  Another way I like is this  I set the size of the next image as follows  plt subplots figsize  15 15    And then later I plot the output in the console  from which I can copy-paste it where I want   Since Seaborn is built on top of Matplotlib  there will not be any problem

User · Answer

Okay  I found spencerlyon2 s answer working  However  in case anybody would find himself herself not knowing what to do with that one line  I had to do it this way  beingsaved   plt figure      Some scatter plots plt scatter X 1 x  X 1 y  plt scatter X 2 x  X 2 y   beingsaved savefig  destination path eps   format  eps   dpi 1000

[python] Saving images in Python at a very high quality

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