Thinking oriented to photography

Perspective is the sense of space formed by viewing angle, that is, the spatial relationship of objects?

Is it an important concept to represent three-dimensional space on 2D plane?

Perspective is essential in painting, and photography, as an extended carrier of painting, must also be mastered.

Photography is a static graphic art, and photos are two-dimensional planes, not three-dimensional spaces. We must understand the perspective relationship to present the structure of this space.

What role will perspective theory play in photography? ?

How do we judge and choose the type of perspective we want to present? ?

Look down with doubt

?

The basic principle of perspective relation:

1. Near big and far small

2. Above the apparent horizon, near high and far low.

3. Below the obvious horizon, near low and far high.

Take these three points to observe your surroundings, and you will find that there are only three basic principles of perspective.

Beyond the principle:

1. Curves and lines

"Art must come from nature, because nature creates the most unique and beautiful shapes for people. There are no straight lines in nature. The straight line belongs to human beings and the curve belongs to God. " The great architect Gaudi once said such a thing.

In other words, we need to understand the concept that there is no straight line in nature. In this world, irregular figures abound, but there is no "straight line". The straight line is only defined by us "human beings".

If there must be a straight line in this world, it is also our human "horizon". But the apparent horizon is actually a plane, so we need to be flexible when discussing the perspective relationship in photography, and use your apparent horizon as a plane. The visual horizon is a plane with the same height as the human eye when observing the scene and extending to both sides along the corner of the eye; When you stand on a flat ground, the apparent horizon is basically the same height as the horizon (the horizon is the line where heaven and earth intersect in the distance). When you stand on high ground, the horizon is higher than the horizon, while when you stand on low ground, the horizon is lower than the horizon, which will change the position of the horizon in the picture.

2. Anti-perspective

People use two eyes to get images of objects, and everything they get is processed by the brain. Based on the shape of objects, they also have a sense of distance in the three-dimensional world. 3D movies are based on the principle of binocular stereo vision, which allows the audience to get the feeling of three-dimensional space from the screen. In photography and painting, three-dimensional space is transformed into two-dimensional space, and some perspective laws will be different.

Vanishing point: Vanishing point is also called vanishing point. In three-dimensional space, due to the change of viewing angle, parallel lines of all faces may look like diagonal lines. And the lines going in the same direction (the direction here refers to the direction away from us) will eventually intersect at a point, which we call the vanishing point. The perspective cutting function in ps is to straighten the tilt caused by the viewing angle.

1. Single point perspective:

No matter the height (standing/sitting/squatting) or position of the object, as long as it is straight, facing the front of the object (such as a wall), the lines will converge to one point, that is, a single point perspective. Single-point perspective has a subjective and first-person feeling, which makes the viewer seem to be one of them, and is often used to express the author's point of view or emphasize the sense of presence. Especially when the space seems to be shrinking in your eyes, if the scene contains line elements (such as roads and corners), you can also form guiding lines to guide the audience to focus on the main body or bring out a sense of visual direction. However, because the face is a plane, the "face" gets more attention on the screen, and the depth performance is not strong, which brings a quiet and steady feeling.

2. two-point perspective?

Facing a corner of the object, in the head-up state, lines will converge from two faces to two vanishing points, that is, two-point perspective. Compared with single-point perspective, two-point perspective makes the three-dimensional sense of the object or the sense of indoor space stronger, and will not be excessively distorted. Biased to the angle of recording and viewing, the feeling of the second person. In order to confuse reality, many synthetic photos will deliberately choose two-point perspective to emphasize realism.

3. Three-point perspective

Generally speaking, the vertical lines are almost parallel to each other in daily perspective, and there will be no obvious changes in lowering the head or raising the head in a small range. However, when shooting at high elevation or depression angle, the vertical parallel lines will become a very dramatic intersection (scene contraction), and the third vanishing point will be obtained (the third vanishing point is above when looking up and below when looking down), that is, three-point perspective. If you use a wide-angle lens, your deformation will be more exaggerated. Three-point perspective greatly emphasizes the depth of the object, and the exaggerated deformation makes it have strong tension, which can emphasize the incredible or spectacular feeling of the subject. ?

Skillfully use guide lines to create a sense of depth and enhance the fabric of the picture.

?

Use foreground and background to create a sense of depth of field, and photos will appear more stereoscopic.

?

Try shooting with wide-angle and fisheye lens to experience more exaggerated angle changes.

?

end

(The pictures are all from the Internet)