Prepress: color processing
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ask:
1. When shooting grass soccer fields, woods, etc., often the color is not green, how can you master better in color correction? In addition, how to maintain the layering of photos while color correction?
2. In the gold or gold advertisements in magazines or newspapers, there will be no gold in the gold ornaments. How can the four-color printing make it more golden?
3. Crystal and diamond advertisements in magazines or newspapers are often not brilliant enough. What are the tips on color processing?
solution:
These three questions, in my case, must first clearly understand the key points of the problem. In my opinion, several problems are problems in photography and hope to remedy later, but the problem should be solved from the root. So first know that the problem occurred at that stage and give different remedies.
First of all, this is the question asked by the photographer or the customer and the designer. It is also asked by the prepress or the printing staff, because the solution is different for different people.
Ok, let's assume that the photographer asked. Why is there a problem when shooting, is the level of the photographer too low, the lack of technology, or the time and place do not cooperate? Speaking back to the shooting of the grass football field, is there any problem with the sun? Is the direction of the sun right in the direction of the grass? The golf course and other places are directional, and the grass that is photographed under a dense cloud is a flat piece, but the sun is too big, and the direction is not right. It is not layered when photographed. If the exposure is wrong, there is no level. It is. Incidentally, the cost of digital photos is almost zero. If you are not sure, you should take a few shots every three points. Don’t think that you can take a photo. No matter how bad you can use it, you can use the retouching software to get it. The mentality is completely wrong, because the retouching software can't add layers to you, no matter what format you take -- Raw, Tiff, Jpg or DNG. Every time you change the color in the retouching software, the level is Loss some, there is no possibility of loss, so even if you don't use the retouching software to change the color, you need to find a manuscript that is the most level to change. The retouching software can only add icing on the cake, and it will never give up in the snow, unless you have high skill. Lin Xuhui, such a master, then you may be born out of nothing.
I have nearly 30 years of experience in photography and printing. I feel that few people who are new to photography have really studied photography, especially the popularity of digital cameras. Many people think that they have bought a so-called "very expensive" camera. After reading two books and reading several articles in the magazine, I thought I knew photography. I didn’t agree with the "fast food" learning method of this era. If I don’t know the basic theories and requirements of photography, it’s hard to mix. of. Some things have to be patted if they are not well-made. Now they all use digital cameras. If they don't work together, they can use them immediately. Unless they have to rely on later remedies, this is the photographer's professional attitude. As for the customer and the design, if the photo handed out by the photographer can not be used at all, the customer and the design person must know how to check, because what problems are pushed to the printing house or the prepress company to solve it, then no problem. But the cost, including time and money, is not necessarily calculated. The author's experience is that the problem is solved later, and the cost is higher.
As for the pre-press, the customer has no way to give you this non-changeable file, then do it! In fact, all the things that need to be changed, including photography and design, please prepare a monitor of your company's best. It is quite professional to change the color. Our company has always done it by someone, not everyone. The picture can be modified, so the best display only needs a few, not everyone. Do you need a monitor with color management calibration to type?
Of course, what I said is the kind of monitor that has been calibrated with color management, but you only have a size of 22 yuan for the kind of one thousand yuan! Buying a wealth-making tool is not a matter of "cost-effectiveness". If you have more than one thousand yuan, you will have 22 miles, "value"! This kind of "calculation" unless you are a master, unless you like my generation can rely on the data of the outlets, otherwise forget it! The LCD that is very "not worth" is still able to display the entire color gamut of four-color printing, and you can count on the "calculation", but only show that less than 80% of the printing color gamut can help you. what? In fact, with today's technology and "real" color management control, the effect of previewing on LCD monitors is also more than 90% of the time of printing. Because the expression of orange and green has always been a weakness of our four-color printing, especially the orange and green displayed on the unadjusted LCD are more favorable. I have said many times before, now using color management is not to let You get good looks, but more accurately imitate how bad the printing is, this is the right direction. So you don't seriously do your own ICC, but apply to someone who is very "pretty" ICC, unless your printing conditions are the same as the ICC, it is not necessarily good for you. Therefore, it is very important to invest in a good monitor. How much it costs, more than 10,000 yuan is indispensable. Compared with the 17-inch 10,000 yuan that I had before more than 10 yuan, it is considered to be "very realistic". Of course, it must be good. Do color management, otherwise it will be useless.
As far as the operation is concerned, there is no fixed law for me. I only have one standard, that is, you need to know what the customer wants. Because there are two factions in the phasing, one faction advocates nature, that is, what you can't see, and the other is computer fascination. It doesn't matter if you have to be arrogant, as long as you exaggerate it. So you have to know clearly what kind of green grass the customer wants to continue, and you have to have the standard to get your requirements through the tools. If you don't have a standard in your heart, you can never do it well. Of course, if you don't understand the contrast color, contrast, adjustment curve, color selection, then you should first learn the basic functions of the retouching software and then ask questions. In fact, the latest retouching software such as CS3, some features are specifically for shooting in difficult environments, photographers should take a good look at those new features, plus traditional skills, work must be very beneficial.
As for gold jewelry, the problem with photography is that your background can stand up to gold diamonds? The light background must have no contrast effect on the dark background, but the dark background "reverse" into the dark black position of the diamond is not good, and the highlight is very important. There is no high-light position that is very "explosive", which will make gold The diamonds look flat. As for how to take a photo of a high-level gold diamond, this is a publication about the art of printing. I will not go into details here. If you are interested, go to a special magazine or magazine for commercial photography!
As for the pre-press, I have said before, I like to have a very "explosive" highlights to strengthen the contrast, the gold and silver diamonds that look like are particularly flashing. When I used to do the advertisement of the "Swan" brand crystal, especially the advertisement in the newspaper, I must not leave a point in the high light position. The printing contrast of the newspaper is particularly low. You can't do it without effect, and there is one. Zhang Xiang has a newspaper and a magazine. It must not be used in a single picture. It must be treated with different ICCs to achieve the best results. However, some seniors will tell you that Gaoguang should also keep a hundred points. If you can't "explode", then you can measure it yourself! I used to manage the entire newspaper. Who do you believe?