What is the function of light in photography? Please answer in detail and be professional.

Photographic light processing is the requirement of photographers according to the theme (or content) of their works.

Use the expression of light to shape the image of characters or scenery, so as to achieve the content of the work.

The required artistic effect is to complete the task of modeling and express the appearance and significance of the dramatic atmosphere.

Mission. The function of light in photography creation is manifested in three aspects: (1) lighting function, namely

Illuminate the theme; (2) Modeling function, that is, expressing the external form of the subject, including three-dimensional texture.

Tone representation and external contour. (3) Ideographic function, that is, light is the main purpose of photography.

One way. The functions of these three aspects are progressive in turn, as well as from the perspective of light.

The way to understand what a "good" photographic work is, specifically, a "good" photographic work does not

Only people can "see clearly" what they shoot and really "feel" the subject.

The objective existence of; Not only should people "feel" the objective existence of the subject, but also let people pass.

Understand and appreciate the thoughts and feelings that photographers want to convey. "Good" photography is not?

Not only attract people on the screen, but also impress people in thought and emotion, and to do this,

It is impossible to form without light.

The photosensitive material used in photography can only play its due role through the light source. light

It is not only used to illuminate the subject in photography, but also to convey the information of the subject.

In this respect, it plays the role of a bridge and a medium. Such as shape, volume, quantity,

Information such as color, texture and spatial depth, as well as the light and shade configuration and picture of the main tone.

Atmosphere, level and many other aspects should be expressed through the effect of light. So,

Photographers can't simply observe the light from the surface image, but should use it flexibly in practical conception.

Light. In a subject, different illumination angles and illuminance will produce different effects. However.

We must master the function of light and "light sense" in photography, be good at using it, have a keen sense and be a photographer.

Photographers should have instinct, painters paint objects with skilled brushes, and photography depends on luck.

Use light to express the subject. Therefore, light is the soul of photography and the process of completing photography.

Light, which expresses the essence of photography art, relies on light to correctly understand light and feel the law of light propagation and change.

Only by understanding the artistic effect it brings and making full use of it in photographic art creation can we do it.

Cherish light as gold, and use light as god.

2. The expressive force of light in photographic art modeling

Photography is a plastic art, and light plays a key role in the expressive force of photographic art modeling.

Use. In photography creation, we should have the modeling consciousness of "light" and mobilize the modeling means of "light" to achieve it.

Its artistic effect. In photography, the reproduction of objects in the picture depends on light to spread.

Media, the modeling performance of light in photography, the rendering of environmental atmosphere and the expression of thoughts and feelings are all.

It means a lot. In nature, light is ever-changing, complex and subtle. one day

Among them, with the change of time, the direction, angle and intensity of sunlight change constantly, so

It will bring different effects in photography modeling. For example, the sun will rise or fall to 15 degrees, also

It is the time of morning or dusk, characterized by the small incident angle of the sun and the vertical illumination of the light on the scene.

The direct light receiving area is large, the projection of the object is long, the contrast between the light receiving surface and the shadow surface is large, and the light is strong.

The degree is small and soft. In this light condition, it is easy to get brightness by shooting with backlight and side backlight.

The air perspective is clear, and the picture presents a strong atmosphere and poetic modeling effect. When the sun and

When the ground illumination is 20 degrees to 60 degrees, this light is characterized by a suitable incident angle.

Medium, clear light direction, small brightness change, good modeling effect, slow light and shadow movement and suitable color temperature.

At this time, it is the prime time for photography. At this time, the scenery is clear, the color is clear and the layers are rich.

Rich, conducive to the three-dimensional sense, sense of space and texture of the scenery in modeling. At this time, the choice is different.

Direction of light modeling, so that the scene can get clear colors, rich levels, rigid lines, light.

Bright effect.

When the illumination is 70 degrees to 90 degrees, the sun shines at noon, the light shines vertically, and the object

Only the top receives more light, but the vertical plane receives less light, which makes the brightness contrast of the scene large and lacks hierarchy.

The perspective effect is poor, and the object modeling lacks three-dimensional sense. Therefore, it is rarely used in photographic modeling effects.

This kind of ceiling lamp.

The change of direct sunlight in a day has different effects on modeling. we can

Design the shape by choosing the lighting direction. According to the direction of shooting and lighting and the irradiation of the sun

According to the direction of the object, the direction of lighting is basically divided into front light, side light and backlight, which are three kinds of lighting.

Different light will also produce different effects and influences in photography modeling.

The expressive force of smooth light on photographic modeling makes the light-receiving surface of the object balanced and can fully express the object.

Texture and tone configuration mainly depend on the tone of the object itself. But smooth light is generally unfavorable.

In expressing the sense of space and three-dimensional sense of objects, the tone is dull and monotonous, the sense of hierarchy is not strong, and it lacks the demeanor of scientists.

The undulating visual rhythm effect is not suitable for scenes with a large sense of space and a large number of objects

Object modeling. Side light has a strong expressive force on photographic modeling, which can brighten the light-receiving surface and light-dark surface of the object.

Display, clear light and dark configuration and contrast of the picture, rich object layers, air perspective phenomenon.

Obviously, it is beneficial to express the spatial depth and three-dimensional sense of objects, and it is a comparison of photographic modeling effects

Ideal light source. However, when using it, we should pay attention to the proportion of light receiving surface and light and dark in the picture modeling.

For example. Backlight can show the contrast and expression of spatial depth and environmental atmosphere in photographic modeling performance.

The effect of spatial perspective is beneficial to outline the outline lines of objects and show the number of objects.

It is better to use low-key pictures to express the plastic arts of objects, but remember to use dark backs.

The scenery sets off the main body. When shooting a close-up or close-up, it is best to use the fill light method in front.

Let the texture of the front of the object be better, and the exposure should be based on the positive brightness to make a modeling effect.

Much better.

Correctly understand the light, master its changing law, and understand its influence on the photographic art modeling table.

The present strength is the only way for photographers to cultivate "light sense". British photographer Keane? Nielsen

People think that photographers should discover and study the different changes of light in a day and a year.

, and understand its full meaning. He put forward a way to observe the effect of light change: find one

A local scene, photographed on a sunny day, one every hour. If you go from a person

Position shooting, you can see the changing effect of light when the sun moves. Or during the day.

At a specific time, shoot around a subject and you will get all kinds of lighting effects.

Fruit and a big surprise. If you want to know how strong the sun is, you can also try to photograph the sun.

Pictures, but be careful not to let strong light hurt your eyes. Shoot after 3 pm or before 9 am.

Yes, facing the sun, you can take a silhouette photo. You can move the lens away from the sun first so that you can take measurements.

Obtain an exposure reading; Then, according to this reading method, all the scenes including the sun are photographed. In that way

Then change the aperture and take another picture as it is. When the film is developed, it will be the last one.

Result.

3. Light reduces the elements of color

In color photography, light plays a direct role in the correct restoration of color. Light and color are

Have close internal relations. Generally speaking, color comes from light and changes with light. truth

Quite simply, if there is no light in the dark, people can clearly distinguish the color of objects under light.

Any color is difficult to distinguish, because color can only be achieved by light irradiation.

At present. Only when light acts on human vision can we feel the feeling of those colors. In terms of complexity

In color photography, the correct restoration and reproduction of color is the key to the success or failure of color photography.

Correct color reproduction has three elements, one is the nature of the light source, and the other is

One is the direction of light, and the other is the intensity of light.

The nature of the light source, it has a great influence on the recovery of the color of the object, because sunlight and light

Different properties, different color temperatures. The color temperature of sunlight is 5400K, while the color temperature of light is only.

At 3200K, under sunlight and light, objects will show different colors. If the red object is in

It looks bright red in the sun, but it will appear red or purple in the light. Because,

The nature of the light source is different, and the color reproduction is also different.

The direction of light, the same object with different angles of light irradiation, such as direct light and

Scattered light, front light and side light, back light and top light, light irradiation direction is different, so that objects are produced.

The difference of light and shade leads to different colors of restoration. Use the same object along the light.

The light-receiving surfaces of colors are the same, and there is no difference between light and shade, which leads to insufficient contrast between light and shade. Side lamp

Yes, the color of the same object can be obviously different in brightness. Backlight is positive for objects.

The surface color performance is difficult to restore, and the overall effect of color is often pursued by the performance of backlight.

Fruit. The intensity of light also easily changes the hue, lightness and saturation of the object color.

Change.

Visible light is an important modeling method of color photography, and choosing light is choosing color. black

White photography is to choose different shades and tones to express the shape of objects, while color photography.

Is through the artistic expression of color. Black and white photography pays attention to the use of light, while color photography is more rigorous.

Light, light can bring about the change of color tone, and also make the color effect more vivid and expressive.

In the conception and creation of color photography, it is necessary to understand and analyze the nature of light source, the projection direction of light,

The intensity of light brightness and the influence of light on the shape of objects. Mobilize the "light" of color

Artistic modeling can enhance the expressive force of art, predict the color effect of the picture and create the birth.

Touching works of art.

The application of light in photography creation is ever-changing and flexible, and light is the basis of photography.

Photography is the art of light and shadow. Without light, you can't get colors, and you can't form photography.

The artistic image of shadow play. So, we had the idea of photography. Have a sense of light modeling and mobilize light.

Modeling function, give full play to the role of light in photographic art modeling.