'Rasterio mask image fill pixels
I am programmatically processing satellite images and using Rasterio to clip my Area of Interests. All my rasterio masks are currently in the 1:1 aspect ratio (square). I have a specific case where in the clipping mask boundaries fall outside the image bounds. I would like to fill the empty areas with dummy pixels of a specific color, instead of the program clipping my image lazily.
The image above shows my current and expected scenario. Basically I would like to preserve my target aspect ratio (1:1) regardless of whether the clipping area is inside or outside of my main image. Is there a function in Rasterio that I can make use of?
I also have an idea in mind using cv2 where I can compare the pixels in and out and colour them conditionally but quite unsure where to start.
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