.merge()

The .merge() function in Pillow combines multiple single-band images into a new multi-band image. This is particularly useful when working with multispectral or multichannel images, such as RGB or CMYK images, where individual channels can be processed separately before merging them into a final image.

Syntax

Image.merge(mode, bands)

• mode: The mode of the new multi-band image (e.g., "RGB", "CMYK", etc.).
• bands: A tuple containing the individual image bands to be merged. Each band should be a single-channel (grayscale) image.

Example

The image to be used for this example is:

The code below splits the above image into its individual bands and then merges them in a different order:

from PIL import Image

# Open the image
image1= Image.open('media/Boston.jpg')
im = image1.resize((400,400))

# Split the image into its RGB channels
r,g,b = im.split()

# Merge the bands in a different order
new_image= Image.merge('RGB', (b,r,g))
new_image.show()

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The output will be: