CODEWITHSUNDEEP
pythonimage
user2956523
user2956523

Reputation: 73

Displaying an image with Python Matlibplot and im.show() , why are they different?

Quick question about displaying an image with Python, difference between 

im = Image.fromarray(noisyImage)
im.show(noisyImage)

I get this:

http://s30.postimg.org/xbkxly81t/other.png

Then when i use matplotlib i get this:

plt.imshow(noisyImage)
plt.show()

http://s30.postimg.org/64odx64ap/mtlibplt.png

please could someone explain why, when its the same image, just different method of display? really confused!! where does the colour even come from on the matplotlib?

Also whats all the noise at the top of the first image? if i do not attempt to change the image it is fine. thanks

thanks for any help.

Upvotes: 1

Views: 163

Answers (1)

unutbu
unutbu

Reputation: 879271

PIL's show is a convenience function which uses os.system to call some OS-dependent image viewer on your machine.

You can find out what command is being used to show the image by doing this:

In [37]: import ImageShow

In [38]: [viewer.get_command_ex('file')[0] for viewer in ImageShow._viewers]
Out[38]: ['display']

So on my Unix machine, PIL's show is using imagemagick's display program.

Matplotlib's plt.show function uses a GUI backend such as tk, gtk, pyqt or wxpython to draw the plot.

Upvotes: 1

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