Why do photographic works need post-processing?

First question: Is the photo true? Obviously, the answer is no, the photos are not true and have nothing to do with the later period. I think this conclusion will definitely surprise the subject. Why do you say that? Quite simply, someone mentioned the word "taken out of context" and explained it very aptly. Photos have boundaries, but the world has no boundaries. In the same place, the difference in composition between you and others will lead to different understanding of photos by the audience. To give a very simple example, we usually try to avoid the trash can when taking photos in travel, but no matter how you hide, the trash can exists objectively in reality, and the trash can in tourist attractions may even be full of garbage, which is particularly ugly. Your photos avoid the trash can, and the audience looks beautiful, but in fact, the trash can that can't be filled is not far from the screen, and you just hide this ugly fact from the angle, so can you say that the photos you haven't seen in the later period are true? Obviously not. Aside from exploring the authenticity of the photo content, we return to the most basic light, shadow and color. Most people pay attention to the authenticity of the later period and think that the color of the later period is not true.

Then the second question comes: is the photo real without going through the later stage? Obviously, the answer is no, most of the photos taken directly without post-production are untrue, which is determined by the imaging principle of the camera, and everything can not be solved in the early stage. Everyone can see that there is a huge structural difference between the camera and the human eye. Camera is the product of electronics, machinery and optics industries, and the human eye is a living body. Therefore, the camera will definitely be restricted by its performance, at least at today's technological level, and the restriction is quite large. The most striking difference between a camera and the human eye is the difference in tolerance. The endurance of human eyes far exceeds that of cameras. Therefore, when the camera is backlit, the human eye can see the details of the sky and the face at the same time, but the camera can't. If the sky is exposed normally, people will be black and silhouette. If people are exposed normally, the sky will be white, overexposed and without any details.