What would be an efficient image type to apply a series of JuliaImages filters?

General Usage Performance
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In JuliaImages we deliberately use N0f8 from FixedPointNumbers to replace UInt8 because otherwise, it’s often very confusing what is white in image processing (1 or 255?).

Converting Array{UInt8, 2} to Array{N0f8, 2} can be done efficiently via reinterpret(N0f8, img_uint8). And the reverse if rawview(img_n0f8)

Many operations like bitwise_and are actually a pointwise operations, and thus it’s better to write the scalar version, e.g.,:

bitwise_and(x::T, y::T) where T<:Number = 0xff * (x & y)

and use broadcasting

C = bitwise_and.(A, B)
# or in-place version
C .= bitwise_and.(A, B)

Didn’t check if the code runs, but I think you can get the idea here.

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