Briefly describe the purpose and significance of photographic structure.

Foreground is a commonly used term in photography, which is related to the front of the camera lens relative to the subject. Prospects are sometimes dispensable, but sometimes they are important. The specific functions are as follows:

First, the application of foreground in framing and composition can enhance the spatial distance of photos. When taking pictures, you don't necessarily need the foreground in most cases, especially if you only take close-ups of mountains, cultural buildings and scenery. However, if shooting scenes near the camera is relatively simple, it is necessary to use foreground shooting appropriately.

Especially when shooting with an aperture value above F8, the depth of field is relatively large, and the front and rear scenes in the picture are relatively clear. The visual effect of lengthening the depth of the scene will make the sense of space more intense, so that the plane picture has a sculptural three-dimensional perspective artistic conception.

Second, the application of foreground in framing and composition can set off the theme connotation of photos. Photos have certain ideological connotations, so what you want to shoot is clear, otherwise the photos will have no soul and become pure photo records. You can choose clouds, sunsets, rivers, peaks, or landscape photos such as buildings and human landscapes as the main body, and other prospects serve it, and the main body is more prominent.

Even if it is a landscape photo of a character, in order to better express the rich forms of the character, increasing the foreground during composition can better set off the nature and charm of the portrait. Similarly, if the flowers, green grass and rocks in front of the snow-capped mountains and rivers are the prospects, the mountains and rivers will be more vibrant and energetic.

Third, the application of foreground in framing and composition can balance the proportion of photos before and after. Some scenes have a panoramic view in front of the lens, but there are no other scenery, which is relatively simple and empty. If the foreground is added to the composition, the scenery before and after the picture will become more balanced, and the problems such as top-heavy imbalance will be solved.

Especially when taking photos such as sunset, sunrise and moonlight under the starry sky, if there is nothing in front of the camera, the sun and the moon may be photographed as "big cakes". However, after joining the prospect, the lonely sun and moon may be flowers, trees or buildings, becoming a seamless natural landscape.

Fourthly, the application of foreground in framing and composition can improve the interesting style of photos. Many scenes can be shot directly, but if some foreground is added appropriately, the aesthetic feeling will be greatly increased, the interesting style will be more elegant, and it will also contain a strong sense of story. For example, portrait photography between flowers, flowers and leaves in the foreground can not only enrich the picture, but also cover up some "flaws" that are not suitable for lens shooting.

At the same time, the foreground can be combined with the main scene to form a new artistic conception, which makes the photos more poetic and improves the interest and style of the photos. The variability and randomness of the foreground will also add unexpected factors to the photo, and sometimes the photo may have unexpected uniqueness just because of a "mistaken entry" of a foreground.