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I have a matrix in the type of a Numpy array. How would I write it to disk it as an image? Any format works (png, jpeg, bmp...). One important constraint is that PIL is not present.
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You can save your NumPy arrays to CSV files using the savetxt() function. This function takes a filename and array as arguments and saves the array into CSV format. You must also specify the delimiter; this is the character used to separate each variable in the file, most commonly a comma.
An answer using PIL (just in case it's useful).
given a numpy array "A":
from PIL import Image im = Image.fromarray(A) im.save("your_file.jpeg") you can replace "jpeg" with almost any format you want. More details about the formats here
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