How can a mobile phone take a picture with a black background?

Background selection, manual focusing and photometry methods, manual intervention on the photo background, weakening the background with large aperture, and strengthening the black background with later software.

1. Selection of background: If we want to take a photo with a black background, we must first learn to choose a suitable background, so when we choose the background, we can adjust the angle with the subject as the core, and we can only shoot and create until we find that the subject has a dark background later. In addition, when choosing the shooting angle, you can also pay attention to the light and dark environment of the subject. If the subject happens to be in the position with light spots and black background elements, then we only need to use the manual focusing and metering functions of the mobile phone.

2. Manual focus metering mode: Mobile phones also have the effect of manual focus metering, especially Apple mobile phones. When using some shooting modes, we can use stage lighting to shoot the effect, which can achieve the photo effect of brighter subject and darker background elements. At the same time, you can also use the adjustment function of Apple's mobile phone to enhance the contrast between light and dark elements in photos. It will be easier to focus and measure light manually on Android phones. After we have done the framing, we can see the prompt box of focusing photometry on the mobile phone by long pressing the screen of the mobile phone. At this time, a small sun appears on the edge of the focus frame, which is the role of exposure compensation. Swiping up and down or left and right allows us to control the light and shade effect of photos. So after the focusing and metering functions appear, we can see the small sun exposure compensation function with a small lock sign on it. After clicking this logo, we can lock the current exposure effect. Then adjust the exposure compensation, the focus and depth of field of the photo will not change, only the light and shade will change. So we can use this function to reduce the brightness of photos. So as to make the brightness of the background darker.

3. Human intervention in photo background: Sometimes we really can't find the black background we want when shooting and creating, so we can use some external elements, such as black background cloth or black paper cards; Without these materials, we can also use our own background cloth to find a smoother side, and it is also possible to use a black background. If it still doesn't work, you can find a black plastic bag and support it with several trees, so that you can make a temporary background cloth effect. We will put it behind the subject to be photographed, and then use the mobile phone to manually focus on metering, so that we can take photos with dark background and bright subject.

4. Weaken the background with large aperture: While learning the above skills, we can also shoot with large aperture, such as portrait shooting mode and large aperture shooting mode on mobile phones. After these two shooting modes are enabled, we can control the depth of field of the photo in an effective range, blur the background at the same time, and add the method of shooting black background, we can shoot a hazy black background effect. In this way, you can get a picture with a clear subject and a black and fuzzy background.

5. Enhance the black background with post-processing software: Sometimes we can't get a satisfactory black background because of environmental problems, so we can use post-processing software to optimize the background effect. For example, when we use snapseed mobile phone retouching software, we can use contrast, atmosphere, vignetting tool or curve tool to adjust the brightness effect of the background. In this way, you can get a black background effect.