# How to Enable NEON in OpenCV by using ndk-build on Android Platform?
**URL:** https://forum.opencv.org/t/how-to-enable-neon-in-opencv-by-using-ndk-build-on-android-platform/12004
**Category:** C++
**Tags:** arm, android, build
**Created:** [February 14, 2023, 4:20pm UTC](https://forum.opencv.org/t/how-to-enable-neon-in-opencv-by-using-ndk-build-on-android-platform/12004 "2023-02-14T16:20:13Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@FakeLab](https://forum.opencv.org/u/FakeLab)
#### Post date: [February 14, 2023, 4:20pm UTC](https://forum.opencv.org/t/how-to-enable-neon-in-opencv-by-using-ndk-build-on-android-platform/12004/1 "2023-02-14T16:20:13Z")
I am new to Android platform. I have already included openCV library in my c++ code and successfully built an .so file by using ndk-build command. The app has already successfully run on my android phone. My question is how to enable NEON for a better performance? I have already included “LOCAL\_ARM\_NEON := true” in my .mk file but it did not seem to work. I will really appreciate your help!
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### Author:  [@crackwitz](https://forum.opencv.org/u/crackwitz)
#### Post date: [February 14, 2023, 8:04pm UTC](https://forum.opencv.org/t/how-to-enable-neon-in-opencv-by-using-ndk-build-on-android-platform/12004/2 "2023-02-14T20:04:27Z")
[undeclared crosspost](https://meta.stackoverflow.com/a/266159):
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