CODEWITHSUNDEEP
pythonimageimage-processingpython-imaging-libraryrgb
PythonMan1029
PythonMan1029

Reputation: 85

Issues converting RGB to image with correct size

I have data of RGB values for an image of size 1280x720 in a list that looks like this:

[[102, 107, 111],
 [101, 106, 110],
 [100, 105, 109],
 [100, 105, 109],
 [101, 106, 109],
 [103, 108, 111],
 [105, 110, 113],
             ...]

I got this data from Image.getdata() and converted it to a 2d list for separate reasons (this list is called all_data). However, when I try to set the size to what I want using the code below, I get a TypeError: too many data entries.

from PIL import Image
import numpy as np

image_out = Image.new(mode = "RGB", size = (1280, 720))
image_out.putdata(all_data)
image_out.show()

This is probably not the right way of doing this, so if anyone has any knowledge of where I should go with it, please let me know. As expected, I have data for 1280*720 pixels that should be in the order that Image.getdata() puts them in (from what I'd assume, it is a standard left to right and top to bottom rendering).

Upvotes: 0

Views: 805

Answers (1)

shadow-kris
shadow-kris

Reputation: 196

So, the image library requires rgb data to be tuples, not a list. I wasn't able to find this explicitly mentioned in the documentation, but verified it through my own testing. All of the documentation examples also use either ints or tuples (https://hhsprings.bitbucket.io/docs/programming/examples/python/PIL/Image__class_Image.html#id1)

The conversion from a list of lists to a list of tuples can be done by this line:

tuples = [tuple(x) for x in all_data]

In context:

from PIL import Image
import numpy as np

image_out = Image.new(mode = "RGB", size = (1280, 720))
tuples = [tuple(x) for x in all_data]
image_out.putdata(tuples)
image_out.show()

Upvotes: 1

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