Right and wrong in post processing

2020-11-19 22:23:59  作者:Photography & Revision

What I wrote before is very specific questions , Too much talk about “ Technique ”.[ The game of light and shadow —— Exposure ][The game of light and shadow _ Exposure][ The game of light and shadow —— Color mode ][The game of light and shadow _ Color mode] Let's talk about “ Avenue ”, Let me talk about my views on the post-processing of pictures . The main difference in the question lies in :

  • One side believes that , Post process the image , Destroyed the original , It's an act of fraud .
  • The other side thinks , Post processing is part of finishing photography , It's a useful adjunct .

My point is this , The problem has to be looked at in two . Photography can also be very roughly divided into two categories :

  • Documentary Photography of . For example, photos of news reports, etc .
  • Creative class Photography of . Including most of the photos for the purpose of expressing beauty .

Documentary photos require authenticity , Generally speaking, post-processing is kept to a minimum , And never change the content .

There are no authenticity requirements for creative photos , So it all depends on the creator's will and aesthetics . I'm not a photojournalist , Usually it doesn't involve documentary photography , The biggest pursuit is to shoot beautiful scenery , And taking pictures of beautiful women , Therefore, this article does not deal with this aspect of the content . For the sake of looking comfortable , Generally, we still need to do post-processing .

In the absence of computers and smartphones , either Photoshop The s , Do photographers not have to think about post-processing at all ? No more than that. . A picture after shooting , The film has to go through development 、 Fixing 、 Wash with water 、 Drying, etc , Finally, it can be expanded into the photos we see . In the age of film , There is a professional skill called Darkroom technology . If all the photos are the same as the printing process , That obviously can't be called “ technology ” Of . In the process of printing , There are many wonderful tricks . Here are two simple examples .

Because I haven't played with film either , The following examples are from the network information and my own understanding .

In the process of flushing , The longer the development time , The more dense the silver particles are deposited on the negative , The brighter the picture is . And the contrast found that , The effect of developing time on the dark part of the photo is significantly less than that of the bright part . therefore , We got a kind of Only adjust the bright part of the photo and have little effect on the dark part Methods . Increasing the development time is called Rush , Reducing the development time is called Hypoesthesia .

The forced impact will obviously show the unique graininess of the film by adjusting the exposure parameters during shooting , We can adjust the light and shade of the picture as a whole ; And by Rush / The way to reduce feeling , We can focus on adjusting the brightness of the photo . Combination of the two , We can control the light and dark parts of the photo separately .

Positive : After developing , A negative whose color and shade are consistent with the final photograph . Negative film : After developing , A negative in color and shade opposite to the final photograph . cross processing , It's a positive shot , But using a negative process to develop , A negative film . The photos obtained by this method are usually extremely colorful , Strong black and white contrast , But exposure tolerance is also very narrow . It's hard to grasp , And once it's successful, it's eye-catching .

Positive film negative impact can often show a retro nostalgic atmosphere, as for Partially covered , Color the picture wait , It can be compared with all kinds of one button beauty and filters now .

The amazing coloring techniques of classic old photos, even in the film age , It's not as good as most people think , Photography is what you see is what you get , It's a reproduction of a real scene . Photography has always been a very subjective activity , From shooting ( In the early ) To develop ( later stage ) The whole process of the author's thought is integrated into it .

Entering the digital age , Whether it's pre filming , Or post processing , The threshold has been greatly lowered . We don't have to hide in the darkroom and fiddle with dangerous bottles and jars , Just move the mouse and keyboard , You can finish the post-processing of the photo . When methods are no longer constraints , The problem we need to figure out becomes :

  • How to do post-processing

Take the portrait photography that you like to see as an example , The purpose of our post-processing is , It's Jean people It looks beautiful , let Photo It looks beautiful ? Although these two parts can not be completely separated , But there's an essential difference between the two .

  • One focuses on fixing the flaws and defects in the facial features and limbs of the person in the photo , Skin grinding to remove acne , Liquefied slimming .
  • A light and shadow effect that focuses on the whole picture 、 Color tendency , The integration of man and environment and so on .

Make the first point , Most people call it PS master ; Make the second point , It's on the road to becoming a master photographer .

I think , Get the picture , It is mainly considered from the following three aspects .2.2.1 Correct exposure & Color balance First of all, set a benchmark for the photo , Adjust the black and white field and color temperature to a relatively accurate value . On this basis , Is more conducive to further processing .

The original is dark , Increase exposure , Show a bright, high-profile feeling The color of the original picture is yellow , Slightly adjust the low color temperature , Increase the sense of permeability 2.2.2 Enhance the beauty of form After setting the benchmark , There's a lot more that can be done , Can give full play to their imagination and creativity . To cut again with , Highlight what you want to express , Delete irrelevant background . Adjust highlights and shadows separately , Light and dark , Looking for a better relationship between light and shade . By comparing hues 、 Adjustment of saturation, etc , To achieve more pleasant color expression .

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