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Image Pyramids - Dealing with Arbitrary Dimeansion

Looking at the Image Pyramids tutorial I see the following note:

Notice that it is important that the input image can be divided by a factor of two (in both dimensions). Otherwise, an error will be shown.

I was wondering, How can Image Pyramid can be built for arbitrary image size and keep the "Reproduction" exact (Up to round off errors).

Image Pyramids - Dealing with Arbitrary DimeansionDimensions

Looking at the Image Pyramids tutorial I see the following note:

Notice that it is important that the input image can be divided by a factor of two (in both dimensions). Otherwise, an error will be shown.

I was wondering, How can Image Pyramid can be built for arbitrary image size and keep the "Reproduction" exact (Up to round off errors).