python - Invert colors when plotting a PNG file using matplotlib - Stack Overflow

I'm trying to display a PNG file using matplotlib and of course, python. For this test, I've generated the following image: Now, I load and transform the image into a multidimensional numpy matrix:

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python - Invert colors when plotting a PNG file using matplotlib - Stack Overflow

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python - Invert Axis on Matplotlib / Seaborn - Stack Overflow

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How to Use Python inside Julia with py to Plot an angle between 2 vectors/lines? - General Usage - Julia Programming Language