How to shoot a portrait with a black background with a mobile phone?

The most direct way is to buy a piece of black cloth as the background and use LED lighting, but this is generally the practice of the photo studio. We can use mobile phones to process the background of pictures:

Step 1: Download and install mobile phone retouching software Snapseed.

Step 2: Open Snapseed, click the brush tool on the right and select the curve.

Step 3: Click the circle icon on the left side of the curve tool page. * * * There are five curves to be adjusted. Click on the "brightest" curve at the back, drag the point in the upper right corner to the lower right corner, and the picture will turn black.

Step 4: Click the Back icon in the upper right corner to view the modified contents.

Step 5: Set the curve value of the picture to 100, and achieve the desired effect after the change.