Samsung Galaxy S5 camera is super feature rich and today thanks to the folks at XDA you will be able to download Download Galaxy S5 Camera to the Samsung Galaxy Note 3 Neo. This will allow you to take 16 megapixel photos too. To install it on your Note 3 Neo, all you need is a rooted device and custom recovery like TWRP and CWM.
Installation instructions:
1) Download the S5CameraPorting-v2.zip from this link.
2) Delete the Samsungcamera apk in /system/app.
3) Flash the download S5CameraPorting-v2.zip via custom recovery.
4) wipe cache and reboot.
It shall be noted that Selective focus and Dual Camera are not working.