What is the main line in photography?

Line, like composition and tone, is one of the basic elements of photography. As a professional photographer, we must master the functions of lines such as straight lines and regular curves in the composition of photographic pictures; Understand the relationship between point, line and surface and its application in picture composition; Understand the relationship between the main line of the picture and the aspect ratio and scene of the picture; Learn to correctly handle the position of the horizon in the picture; Know a few invisible lines; Clarify the specific meaning of line perspective. The following is some basic knowledge about photographic lines: 1. Determine the width-height ratio of the frame according to the characteristics of the main line;

The main line is a line that can reflect the main external characteristics of the subject. What kind of picture frame is most suitable for a painting depends on the extension of its main line. The main line extends to the left and right, so the picture adopts a horizontal frame; If the main line extends up and down, the frame will be vertical accordingly. In short, the width and height of the frame are completely controlled by the extension of the main line. Second, how to emphasize the main line in the picture: First of all, you should be able to see the "line" and distinguish the main line. When framing and composing, we should fully mobilize various modeling factors such as line, color, tone, shooting distance and shooting angle to highlight the main line most effectively. In addition, the picture formed by the edge line of the line always has a mutually restrictive relationship with the main line in the picture. The edge line should catch up with the main line to make the picture compact, and it is at this time that the main line can be more prominent. Third, the control of the horizon: the horizon can be regarded as a very special line. The key to deal with the horizon is to arrange the position of the horizon just right: the horizon is at the top of the picture (usually at a high angle), which is called "high horizon". At this time, the screen mainly emphasizes the ground situation; When the horizon is at the bottom of the picture (usually taken at a low angle), it is "low horizon". At this time, the picture emphasizes the position of the sky; When the horizon is in the center of the picture, that is, "the horizon is in the center", then the picture is very easy to be "cut" into two parts and should generally be avoided. If it is really unavoidable, it can also be solved by "disconnection". Related knowledge 1. Symbolic meaning of straight line: the horizontal line has the trend of infinite extension, indicating openness and broadness! Calm, the horizontal line is the quietest line of all lines; The vertical line tends to extend infinitely to the vertical direction, indicating that it is tall and straight; The diagonal line is between the first two, and the trend is unstable. At the same time, they show the existence of the third space in the plane photography picture, suggesting the sense of space depth. The perspective produced by multiple oblique lines is what people often call "line perspective". 2. The "looseness" and "tightness" of the picture: the boundary line of the picture "frames" the scene or people. Where does the framework end? Is the frame "looser" or "tighter"? It should be decided according to the needs of expression. Generally, loose borders are suitable for expressing quiet and relaxed artistic conception, while compact borders are suitable for pursuing tension and dynamic effects. As shown in the figure:/. 3. "Broken line": When a line in the picture feels too simple and strong, but it doesn't need to be emphasized at this time, for example, when the horizon is in the sound, you can use lines in the opposite or opposite direction to weaken this overly prominent feeling, which can break the single feeling brought by the original lines and enrich the feeling of line formation in the picture. This method is called "broken line method". Line is an important element in picture composition, and line consciousness or sense is an indispensable part of modeling training. When practicing, we should pay attention to the ideographic tendency of lines, which must be combined with the concrete expression of the picture. Lines cannot exist in isolation, especially in product photography and advertising photography. Never "speak lines for the sake of lines", take lines as the purpose of performance.