What do you mean by taking pictures against the light?

Backlight photography is HDR mode, which means that the mobile phone camera takes multiple photos with different exposures, and then processes them through the internal software of the mobile phone to suppress the overexposure of the strong light part and enhance the weak light part, so that the photos have a certain sense of hierarchy.

Backlight is a kind of lighting with artistic charm and strong expressive force, which can make the picture produce an artistic effect completely different from the actual light we see with the naked eye at the scene. Backlight photography is a means of taking pictures by using light. Broad backlight should include full backlight and side backlight. Its basic characteristics are: from the light level, total backlight is the light emitted from the subject's back to the camera, also known as "backlight"; The side backlight is the light from the camera's left and right 135 back to the subject. The light receiving surface of the subject accounts for 1/3, and the backlight surface accounts for 2/3. Especially when shooting in the morning or evening with backlight, the color composition has changed from far to near due to the different media conditions in the air: the foreground is dark and the background is bright; The foreground color saturation is high and the background color saturation is low. In this way, the whole picture from far to near, color from shallow to deep, from shallow to deep, forming a subtle sense of space depth.