What are the most common contrast techniques in photography and how are they reflected in actual photography?

First, color contrast, common cold and warm tone contrast. The sky is warm and the ground is cold. There are other contrasts between different colors.

Second, contrast, contrast between Gao Fancha and low contrast, highlighting more details of photos. Excessive use of Gao Fancha will reduce the texture of the picture, and excessive low contrast will make the details of the picture inconspicuous. Suitable is best.

Third, the contrast between softness and sharpness makes the sky soft and sharp, forming a contrast between softness and sharpness. The combination of soft and hard is the most perfect, not the sharper the better, nor the softer the better.

Fourth, contrast between light and shade, bright sky and dark ground, so that the picture contrast between light and shade, forming a silhouette.

Fifth, dynamic and static contrast, with the perfect combination of dynamic and static to tell human stories.