How does Apple's mobile phone shoot flowers on a black background?

Looking for black scenery, looking for black cloth, and adjusting later.

Shooting flowers on a black background with a camera is similar to shooting flowers with a camera. Mainly by looking for a dark background, using black cloth, and later adjusting. 1. Find a dark background to shoot flowers. Because of the light, the background has shadows and highlights. Find the flowers in the shadow and photograph them. Focus on the flowers on the mobile phone screen. Some mobile phones can hold down the exposure, so that the background in the dark shadow turns black and the color of the flowers tends to be normal. You can also use the light and shadow projection from tree to tree to choose the flowers illuminated by light. Because the flowers are bright, when shooting, the mobile phone screen clicks on the flower area to focus on metering and realize the background black. 2. Use a black cloth (the simplest) to shoot flowers with a black background. The easiest way is to use a black cloth and put it behind the flowers. Both cameras and mobile phones are the same. When shooting, the mobile phone lens should be aimed at the flowers, and the effect will be the best. 3. After adjusting the mobile phone to take photos later, there are many apps that can adjust the background of photos later. It is suggested to use snapseed to darken the background or reduce the exposure, which is highly operational.

I hope you have a group and need to master it skillfully, which can be applied to many aspects, such as shooting on a white background. Think more, think more.