How do Oppo mobile phone photos turn back to color in black and white?

After the OPPO mobile phone camera is turned on, after clicking the three circle icons, R 1/R2 represents different filter effects.

You can select a camera filter by the following steps: Click "Camera >"; Three laps >; Filter ".

The camera is a "magic entrance". When you open it, you can experience the fun of taking photos and shooting videos. Support portrait, night scene, panorama, professional, time-lapse photography, slow motion and other modes. Record wonderful moments at any time.

This answer applies to all OPPO models.