How to adjust the sharpness of photos

How to adjust the photographic clarity? When the photographic clarity is not good, it looks uncomfortable. When we want to show a picture, we often need to enlarge it first, but the effect after enlargement is always unsatisfactory. Let's see how to adjust the photographic clarity.

How to adjust photographic clarity? 1 1. Select the raw format of the camera picture format:

The advantage of raw format is that it records optical information to a great extent and provides a broad space for later creation. If you use jpg, some explosions and dead darkness can't be pulled back. When shooting in raw format, the white balance and color temperature can be completely ignored, and it will not be distorted when it is adjusted back.

2. Low sensitivity shooting:

Sensitivity is ISO. As we all know, the higher the sensitivity, the more noise there is in the picture. Therefore, under the premise of accurate exposure, reduce the sensitivity as much as possible. In order to achieve the ultimate pursuit of image quality, the SLR should not exceed 400. However, with the continuous improvement of equipment level, generally speaking, the sensitivity of Quan Huafu SLR is below 3200, and aps-c SLR is below 1600, which will hardly affect the image quality.

Then a clever friend asked: sometimes the light is not enough. What should I do if the picture is not exposed enough when I use low sensitivity? It can be solved by increasing the aperture and shutter time. Generally speaking, there is no problem with the hand-held shutter1125. If you want to increase the shutter time, you can also solve the shutter time problem with stable equipment such as tripod.

3. Be careful of the camera's limit value:

Lower the camera/lens limit 1-2. For example, for a lens with a maximum aperture of 1.4, due to lens dispersion, it is recommended to open it to 2.0 at the maximum. The maximum zoom lens is 200mm, and it is recommended to adjust it to180mm; . When the aperture is minimum, do not adjust it to the extreme values of 18 and 22. In these extreme states, the image quality is usually poor. For example, the problem of backscattering in the picture below is particularly serious in the case of large aperture.

4. Selection of filter:

Both novice and old wizards will add filters to their beloved lenses. But inferior filters will seriously affect the color and image quality. In short, either don't install filters or install genuine filters.

Post-processing:

1. Post-professional software:

It is recommended to use PS, LR and other software. Each image has a different color and light and shadow. It is strongly recommended that you use a one-click template such as a show, which will make the photo quality very low!

2. Color gamut and bit depth:

If your monitor supports RGB color gamut, congratulations, you can set the color space of camera and monitor to proPhoto RGB or adobe RGB instead of the default s RGB. These two colors have a wider color gamut and finer colors.

If your monitor does not support RGB color gamut, then you must set the color space to sRGB, that is, the camera, ps and monitor are all set to sRGB, otherwise the film will have color difference!

Adjust the depth of the processing space to 16, so that the photos will be more polished and the details of the photos will be better protected. But be careful! When processing the exported photos, you must save them as sRGB and 8-bit depth, otherwise you will not be able to display colors correctly on web pages and mobile phones.

3. Noise reduction and sharpening:

Acr filter in PS has the functions of noise reduction and sharpening. Noise reduction first and then sharpening, the order should not be reversed, and the overall adjustment of 5%- 10% is enough, not too high. The final output can further sharpen and enhance the details of skin and facial features. Tips to share, students take notes: stamp layer-copy-filter-Gao Fancha keeps 2-3 pixels-mixed mode superposition.

4. Convert to smart objects:

Many friends used Ctrl+T scaling transformation when typesetting photos, and found that the picture quality became extremely blurred because the layers were not converted into smart objects. Operating on smart objects has no effect on the picture quality, and can be modified many times.

How to adjust photographic clarity? 2. Adjust camera exposure, camera focus, depth of field, improve sensitivity, use a tripod, or shoot the camera at a fixed location.

1, correctly exposed. Correct exposure is to ensure that the brightness of your subject is correct. How? Beginners want you to set the camera's metering to "matrix metering" or "evaluation metering". In this way, the phenomenon that the picture is too dark and too bright will be greatly reduced. At the same time, unless you master the use of exposure compensation, try not to shoot against the light.

2. Focus correctly. Focusing is very important, which directly affects the clarity of the subject. When shooting, press the shutter button halfway, aim the focused small box at the person or thing to be shot, wait until the box turns green, or press the button to the end with a "drip". Pay attention to keep the camera stable and don't shake or shake.

3, depth of field, improving sensitivity, improving shutter speed and so on, I will not tell you, I will tell you when you need it.

4. Use a tripod or shoot the frame in a fixed place.

How to adjust photographic clarity? 3. Six problems that should be paid attention to in the early shooting creation:

1 to ensure the accuracy of focusing and the stability of shooting equipment.

This is a basic problem, and many novice photographers will have these problems when they start their photographic creation, because the photographic equipment itself is not well run-in. The first is focusing accuracy. When shooting the subject, ensure the focus information feedback of the shooting equipment. Whether it is a mobile phone or a camera, the camera will have a focusing process, and the mobile phone needs to manually click on the screen to complete accurate focusing in a relative environment.

In addition, in this focusing process, we need to ensure the stability of the device before pressing the shutter, such as using a tripod to stabilize the camera or mobile phone, and at the same time ensure that the shutter speed is raised to a relatively safe shutter speed. If it is a SLR camera, you can even turn on the pre-lifting function of the reflector, but cameras and lenses with tripods need to turn off their anti-mixing function to take clear and textured photos. If you are shooting with a camera, it is best to turn on the anti-shake function.

2. Select the raw format when saving photos, or JPG+RAW.

Before shooting and creating here, what you need to do is to take the camera settings seriously. If you know the principle of raw format files, you can know that the advantage of RAW format is that it records the optical information of photo files to a great extent, and it can provide a broad space for later creation.

If you use a format such as jpg, you can't pull it back if you want to use the later software when the photos are overexposed and dark. At the same time, saving photos in raw format has another advantage, that is, it can automatically adjust the white balance, color temperature and other parameters of photos, and then when we go home, we can flexibly adjust them with post-processing software in combination with our own post-processing ideas.

However, some cameras also have compressed versions in RAW format, which will be smaller and save a lot of memory space. This is also for us to export photos more conveniently and prepare for those partners with smaller memory card space. However, compressed RAW format photos will lose quality after being tried. But not obvious. This function can be determined according to individual circumstances.

Many partners don't understand why I suggest choosing JPG+RAW to save photos. In fact, the reason is very simple, because many people don't have the function or software to browse RAW directly on their computers, and the RAW grid must be opened with professional software, and there will be a time delay when it is opened.

It will affect our efficiency in browsing photos quickly. So the advantage of JPG+RAW format is that when we need to browse photos quickly, we can look at JPG format first, and then look for photos in RAW format according to the corresponding numbers. Of course, using this photo storage mode requires our memory card to be slightly larger. For example: 128G memory card.

3. Pure image quality brought by low sensitivity

Understand the three elements of camera exposure, and you will know the ISO parameters of sensitivity. The higher you turn it on, the more noise there is in the picture. The lower the sensitivity, the less noise there is in the image quality. Therefore, in order to get a clean and excellent photo effect, we need to set the sensitivity as low as possible when shooting.

Then there will definitely be a partner asking, when the sensitivity drops, the subject's light is insufficient and the photo screen is not exposed enough. What should I do? This is easy to solve. We can solve it by using a large aperture and slowing down the shutter closing time. However, it should be noted here that a tripod is needed to stabilize the camera when the shutter slows down. So this is why experienced photographers will definitely bring tripods when they go out to create.

4. Try to avoid using extreme lenses:

This point has been mentioned to you more than once in the early photography skills, which is the extreme value of the lens. If the aperture is too large and the Jiao Wai is too strong, the image quality will decline; However, when the aperture is used to the minimum, the image quality will also decline. What is the specific reason? You can search yourself.

So what aperture value can be used to take the best photos? The method is actually very simple, that is, the maximum aperture is reduced by two or three gears. For example, the best imaging aperture parameters of many lenses are between F7- F 14, so we can try the middle aperture parameters for comparison. This can help us find the aperture parameters with better imaging quality.

Of course, the use requirement of aperture limit is not absolute, and this should be adjusted according to your own creative ideas. If you are shooting beautiful women and taking photos, you will definitely use a larger aperture, and even open it to the maximum aperture. Here we need to ensure the details of the model's face.

5, the correct choice and use of filters

The filter is an accessory that puzzles many photographers, because the usage rate is not very high, but sometimes it is an indispensable accessory. But low-priced filters will affect the imaging quality, and high-quality filters are expensive. So many people will buy the kind of filter that can be used to save money.

However, after use, there will be problems that lead to image quality degradation. So the interesting suggestion here is either not to install a filter or to install a genuine filter. There is no need to prepare too many genuine filters. Neodymium reducer, medium gray gradient mirror and CPL polarizer are often used. You can make appropriate choices according to your usual shooting theme.

6. Find the right measuring point

In order to get more details of photos, we need to ensure the correct exposure of photos, so we need to find the correct metering area in the framing picture. For conventional landscape photography, we often need to consider the light and dark details of the restored picture. Then at this time, we need to find the middle area of the transition between light and dark in the picture for metering.

If the metering position is wrong, the photos taken may have the following two situations. First, when we measure the light, the details of the light will be normal, but the details of the dark part will be insufficient, and then the color of the dark part will become ugly; But if the dark part is measured, the bright part will be overexposed and the dark part will be normal. At the same time, it is necessary to ensure the overall exposure effect of the photo. If the photo is too dark, the brightness of the color will decrease, and then the photo will look dirty.

Two, the use of post-software to improve the image quality of the five skills

1, in order to ensure the effect of photo quality, we need to use professional post-software:

Why do you say that? Because the post-processing software developed by large factories is the result of thousands of data tests for many years. Professional retouching software, such as photoshop and Lightroom, has strong image algorithm and optimization ability. As long as we use it properly, we can ensure that the image quality will not be lost.

Therefore, when using the later software, we need to pay attention to more detailed changes in the functions of retouching and color matching, and we need to pay attention to a golden mean when adjusting various parameters of photos. Observe the changes of photo details at any time. For example, many people like to pull the contrast, clarity and sharpness of photos, but after pulling, many people will find that photos have that kind of visual tearing feeling, which is what we often call professional beam language: moire problem; This will cause a loss of image quality.

2. Set the color gamut and bit depth of retouching software and photos correctly.

This has been mentioned to you many times in the previous tutorial. If you have a monitor that supports multi-mode color gamut, congratulations, so you can set the color space of camera and monitor to proPhoto RGB or adobe RGB；; Because these two colors have a wider color gamut and finer colors. Can let us see more color effects and changing details.

But most ordinary monitors only support sRGB color gamut, so we need to set the color space of cameras and software to SRGB, including monitors, otherwise it will cause color difference! Many partners don't understand what color difference is. For example,

For example, adobe RGB color gamut mode is set in photoshop, but the computer monitor only supports SRGB color gamut mode, so the picture effects we export may have different colors when shared on other computer screens. It will make the audience look and feel that the color is different and biased.

Let's talk about depth first. Many people don't know how to use the bit depth correctly. So here's a way for everyone. We can adjust the bit depth of the processing space to 16 in the later retouching, so that the photo effect of retouching is in a state of high color gamut display coordination.

It will be more polished and the details of the photos will be better protected. However, when exporting photos, we need to pay attention. At this time, we need to save the photo as SRGB, which is 8 bits deep. Because of the depth of 16, many web pages, mobile phones and monitors do not support it, which will lead to the problem of abnormal color display.

3. Reasonable use of noise reduction and sharpening:

Most professional retouching software will have the basic functions of noise reduction and sharpening, but many people don't know how to operate the concept of noise reduction or sharpening first. Interesting photography tells you the correct operation sequence: first reduce noise, then sharpen it, and the order should not be reversed; At the same time, we should also pay attention to adjusting the parameters of noise reduction and sharpening. Generally, an overall adjustment of 5%- 10% is enough, and it should not be too high. If it is a portrait photo, the skin and facial features details of the portrait photo can be further sharpened and enhanced when it is finally output.

The operation skill is simple. Press ctrl+shift+alt+E to imprint the layer, and then copy another layer. For the copied layer, click the filter menu, find the Gao Fancha, adjust 2-3 pixels, and finally choose the blending mode: superposition can adjust the texture of the character's skin to be more textured.

4. Use smart object function

Speaking of Zhitong objects, I don't know why so few teachers talk about this skill. In some cases, in order to make our photos display better, we may use scaling or deformation tools, but when we directly deform the photos, we will find that the image quality will become very blurred. Then at this time, you can convert the layer into a smart object to operate. After the picture is converted into a smart object, various operations will be performed. At this time, the picture quality will not be affected, and the operation can be modified many times.

The operation method of converting a picture into a smart object is simple. First, import the picture into PS. In the layer window on the right, right-click the background layer and a menu list will pop up. Locate the smart object and click it.