[FIXED] Saving figure with exact pixel size

Issue

How can I declare in python the pixel size (height and width) in which I want to save a figure (not just dpi, the exact number of pixels)? I've seen a lot of similar questions, but quite old and none of them seems to work (example1 example2).

I would also like to know if by doing so it's possible to change the aspect ratio of an image? I have a 11227x11229 pixels image, I would like to open it in python and save it as a 11230x11229, but so far can't achieve it.

Right now this is how I save my image, but I have to play with the "dpi" setting to approach the desired resolution. It's tedious, I can't always have the exact resolution and I can't change the aspect ratio like intended:

fig, ax = plt.subplots()
plt.subplots_adjust(top = 1, bottom = 0, right = 1, left = 0, hspace = 0, wspace = 0)
plt.axis('off')
plt.imshow(superpositionFINAL)
plt.savefig('myImage.png',  bbox_inches='tight', pad_inches = 0, dpi=2807.8)
plt.show()

Thanks

Solution

I don't know how to "accept as answer" the comments under my posts? So I just write the answer here. It's by using the PIL package that @martineau and @Mark Setchell suggested that it worked like a charm:

from PIL import Image
img = Image.open('myImage.png')
newsize = (11230, 11229)
img = img.resize(newsize)
img.save('myResizedImage.png')

Answered By - chang thenoob