PIL => create a transparent image

pythonprogramming

To create a transparent png with PIL you can use this code, as example. In this particular example I joined 2 transparent png and pasting them side by side on a new transparent image of the same size of the two together.

The process in the code is this:

  • we create a new image (Image.new) with “RGBA” as first argument and (0,0,0,0) as third argument
  • then we open two png (transparent)
  • we past the 2 element one next to the other

First Image

second image

# combine 2 png images horizzontally

from PIL import Image

def combine(i1,i2):
    i1 = Image.open(i1)
    i2 = Image.open(i2)
    x1, y1 = i1.size
    x2, y2 = i2.size
    x3 = x1 + x2
    y3 = y1 if y1 > y2 else y2
    i3 = Image.new("RGBA",(x3,y3), (0,0,0,0))
    if y1 > y2:
        y2 = (y1 - y2) // 2
    else:
        y2 = y1
    i3.paste(i1, (0,0), i1)
    i3.paste(i2, (x1,y2), i2)
    return i3

i = combine("folder.png","py.png")
i.save("folder.png", "PNG")
i

The output (images 1 and 2 side by side) on a transparent background

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