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Is Neon Optimization enabled by default in Official OpenCV 3.4.4 prebuilt android libraries?

I need to know this as my online search never provided me the answer. a) Is the NEON optimization enabled in the default official precompiled android Opencv libraries? If No, then is there any reason why the official team does not compile it with it enabled? b) If an android device does not have support for NEON optimization (I think some armv7a processor doesn't support it). Does it crash or fallback to non-neon algorithm?

Is Neon Optimization enabled by default in Official OpenCV 3.4.4 prebuilt android libraries?

I need to know this as my online search never provided me the answer. answer.

a) Is the NEON optimization enabled in the default official precompiled android Opencv libraries? If No, then is there any reason why the official team does not compile it with it enabled? enabled?

b) If an android device does not have support for NEON optimization (I think some armv7a processor doesn't support it). Does it crash or fallback to non-neon algorithm?