CODEWITHSUNDEEP
pythonimagedrawingdraw
AK_
AK_

Reputation: 2059

python creating an image from RGB tuples

I have a muti lined .txt file with image data like this:

(198, 252, 247) (255, 255, 250) (254, 253, 248) (251, 252, 246) (247, 248, 240) ... 
(100, 144, 247) (255, 200, 250) (254, 253, 248) (251, 252, 246) (247, 248, 240) ...

How do I read these data into tuples?

lst = [((198, 252, 247), (255, 255, 250)), (second line), (thrid) ...]

and eventually draw each line back into an image file using the Image module

Upvotes: 1

Views: 6583

Answers (2)

Dan Gittik
Dan Gittik

Reputation: 3850

Simply read each line, extract the value triplets from it, and convert them to integers.

import re

triplet = r'\((\d+), (\d+), (\d+)\)' # regex pattern

image = []
with open('image.txt') as fp:
    for line in fp:
        image.append([(int(x), int(y), int(z)) for x, y, z in re.findall(triplet, line)])

EDIT

To actually draw the image, check out this question. However, this should work:

from PIL import Image

width, height = len(image[0]), len(image)
data = sum(image, []) # ugly hack to flatten the image

im = Image.new('RGB', (width, height))
im.putdata(data)
im.save('image.png')

Upvotes: 2

sudo
sudo

Reputation: 943

First you need to scan and split the data from the file, then you can just parse the tuples from the data (string tuple), then simply create an image object using PIL

def getTuple(s):
    try:
        s = eval(str(s))
        if type(s) == tuple:
            return s
        return
    except:
        return

with open("filename.txt", "rb") as fp:
    im_list = []
    data_points = fp.read()
    data_point_list = data_points.split("-")
    for data_point in data_point_list:
        im_list.append(getTuple(data_point))
    # the code snippet from https://stackoverflow.com/questions/12062920/how-do-i-create-an-image-in-pil-using-a-list-of-rgb-tuples
    im2 = Image.new(im.mode, im.size)
    im2.putdata(list_of_pixels)

Upvotes: 0

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