Combining multiple channels of an image

We can use the merge() function to combine the channels of a multi-channel image, as is shown in the following code, wherein the color channels obtained by splitting the parrot RGB image are merged after swapping the red and blue channels:

im = Image.merge('RGB', (ch_b, ch_g, ch_r)) # swap the red and blue channels obtained last time with split()
im.show()

The following figure shows the RGB output image created by merging the B, G, and R channels by running the preceding code snippet: