Face recognition
The principle of the camera and the camera module is the same: the light is concentrated on the sensor through the lens to get a brightly colored and clear picture. However, when we shoot in the direction of the sun for a long time, the sun shines unreservedly on the lens. Thus concentrating strong light on the fragile sensor, harming the camera sensor.
I remember that some time ago, during the solar eclipse, according to reports that many photographers‘cameras burned out because they photographed at the sun for a long time and do not take any protective measures. Well, if the sun falls behind us, it is equivalent to creating a smooth shooting environment. If the shooting technique is not at the right angle, it will not only cause problems such as ghosting or light spots, but also easily cause overexposure.While too dark leads to unsatisfactory pictures, and the recognition rate of face recognition equipment will decline.
Therefore what is backlit shooting and what is Direct sunlight?
Direct sunlight
The light is in the same direction as the lens, and taking the photos in relatively flat. The brightness of the foreground is similar to that of the background. The subject is directly in front of the shadow, and the subject often blocks its shadow.
Backlight
The light is opposite to the lens. Taking photos are dark in front, and bright in the background, with only outlines. The object is directly behind the shadow, and the object is usually in its shadow. So, you can choose the wide dynamic camera module for backlight shooting, and the backlight shooting is also clear, very suitable for outdoor use.
Sidelight
The angle between the light and the direction of the lens (not vertical and unequal), the foreground part is bright and the part is dark (with obvious light and dark changes), forthermore the background behind is fully bright. Typically, the shadow is on the left front, right front, left rear, and right rear of the object, and the shadow will not be blocked.
When talking about light, we can look at our watches as a test. For exsample: if the subject in the axis of the fixed pointer in the middle of the watch. When point at six o’clock, there is a forward light. When point at 12 o’clock, there is a backlight. Other points can be ignored as side light. If a flat dial is a space, and standing is a space. The space we are in is three-dimensional, so it should be used flexibly.
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