Interpretation of photographic photometric terms

Painting ",how important visible light is to photography.

Let's learn one of the six basic elements of photography light: luminosity.

1. What is luminosity?

According to the textbook, luminosity refers to the intensity of light emitted by a light source, the illuminance of light falling on the surface of an object and the brightness of the surface of the object.

Among them, the intensity of the light source and the irradiation distance affect the illumination, while the illumination and the luster of the object surface affect the brightness of the object itself.

Do you feel confused when you see this string of words?

In fact, in the field of photography, you can understand it like this:

Brightness refers to the brightness of the surface of an object irradiated by a light source. In other words, the exposure of the object surface recognized by naked eye vision is luminosity.

Usually, photos with strong luminosity are rich in color, accurate in color and accurate in exposure. Even "overexposure" and "underexposure" in art are based on accurate exposure.

For example, this picture:

Looking at the histogram below, we can see that this picture is underexposed, but the details of the picture are rich, the light on the skin of the characters is natural, and the layering and texture are extremely strong, so it is still a dark work with strong luminosity.