[Tut] Python Convert Image (JPG, PNG) to CSV

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Python Convert Image (JPG, PNG) to CSV

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Given an image as a .png or .jpeg file. How to convert it to a CSV file in Python?

Example image:

Convert the image to a CSV using the following steps:

1. Read the image into a PIL.Image object.
2. Convert the PIL.Image object to a 3D NumPy array with the dimensions rows, columns, and RGB values.
3. Convert the 3D NumPy array to a 2D list of lists by collapsing the RGB values into a single value (e.g., a string representation).
4. Write the 2D list of lists to a CSV using normal file I/O in Python.

Here’s the code that applies these four steps, assuming the image is stored in a file named 'c++.jpg':

from PIL import Image

import numpy as np # 1. Read image

img = Image.open('c++.jpg') # 2. Convert image to NumPy array

arr = np.asarray(img)

print(arr.shape)

# (771, 771, 3) # 3. Convert 3D array to 2D list of lists

lst = []

for row in arr: tmp = [] for col in row: tmp.append(str(col)) lst.append(tmp) # 4. Save list of lists to CSV

with open('my_file.csv', 'w') as f: for row in lst: f.write(','.join(row) + '\n')

Note that the resulting CSV file looks like this with super long rows.

Each CSV cell (column) value is a representation of the RGB value at that specific pixel. For example, [255 255 255] represents the color white at that pixel.

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For more information and some background on file I/O, check out our detailed tutorial on converting a list of lists to a CSV:

Related Tutorial: How to Convert a List to a CSV File in Python [5 Ways]

https://www.sickgaming.net/blog/2022/09/...ng-to-csv/