How does the camera make the foreground real and the background virtual?

Is there any good way to "blur" photos with mobile phones?

Is there any good way to "blur" photos with mobile phones?

There are two ways to blur photos with mobile phones. First, take blurred photos in the early stage; Second, the effect of repairing "blur" with mobile phone in the later stage.

1, pre-shooting, direct elimination of blur, with the following skills, as well as mobile phone settings:

(1) Set the camera of the mobile phone to a large aperture, and focus on the object or model to be photographed when shooting.

(2) If there is foreground, focus on the scene behind the foreground, and the foreground can be blurred.

(3) How to set the large aperture of the mobile phone: (see the figure below) Turn on the camera of the mobile phone. At the top of the screen, there is an icon similar to a shutter. You can set it with a click.

2. After the shooting is completed, you can retouch the picture through your mobile phone and adjust it to blur:

(1) Open the photo with mobile phone retouching software Snapseed.

(2) If the color is not suitable, use tools to adjust the picture and color it appropriately. Because there is more light in the photo, reduce the highlights and make the light more obvious.

(3) Blurred: Blurred tools and lenses. There are two circles in the photo which are concentric. When the center of the circle is blue, you can adjust the size of the circle. Hold down two fingers and contract to the middle, so that the inside is small and round, just at the edge of the person.

(4) Finger sliding up and down in the picture: Because the original picture is dark, adjust the vignetting intensity to 0. Transition refers to the extent to which the range between two circles is blurred.

Four methods of shooting "fuzzy" background with mobile phone;

The "blurred photos" mentioned by the landlord should mean "clear subject and slightly blurred background", which can be realized from four aspects: shooting distance, equipment and later stage.

First, control the "distance" between the mobile phone lens and the main body;

When shooting with a mobile phone, the closer the lens is to the subject, the more blurred the foreground or background will be under the premise of clear focus.

While mastering the shooting distance, we should also pay attention to the focus position, which determines the blur position.

1- Left: Focus on "Far Bud" to blur the close-up.

2- Right: Focus on "nearby flowers" and the foreground is blurred.

Second, shoot the blurred background with the help of "external lens":

Similarly, mobile phone photography, we can also use external lenses to enhance the shooting effect.

Connecting a macro with a mobile phone is the same as the "camera close-up" shooting mentioned above, and at the same time, it can further shoot a lot of detailed pictures that are invisible to the naked eye. Of course, the background blur is more obvious.

It should also be noted that when macro shooting, the focus should be accurate, and the mobile phone will focus automatically, but before shooting, you should get used to clicking the focus position repeatedly with your fingers in order to further focus clearly manually.

When shooting some distant scenes, if you use the telephoto lens of your mobile phone, you can not only get a clear distant scene, but also get a good depth of field effect.

Shoot directly with the mobile phone (Figure 1), then use the mobile phone and telephoto lens (Figure 2). In contrast, (Figure 2) the background is blurred obviously.

When shooting with a telephoto lens of a mobile phone, we should pay attention to ensuring the stability of the mobile phone, otherwise it is easy to blur the picture. It is recommended to cooperate with a tripod when you first contact.

Three, use the mobile phone "portrait mode" shooting:

Nowadays, many mobile phones have "portrait shooting" mode, which can imitate the effect of "large aperture", but because it is intelligent blur, it is not real optical imaging, and some details will be blurred.

Comparing the three pictures, although the background of "portrait mode" is blurred obviously, if you carefully observe the surroundings of the subject, there will be the defect of "fuzzy failure". So the partners used it carefully when shooting.

Fourth, the vague background of post-production of mobile phones:

Finally, the post-production of "blurred background" through mobile phones is usually a way to save the background of the picture from being too messy and to remedy it later.

The specific method of making a mobile phone: click "Mobile Party Shooting", then click "Send Private Message", and reply to the keyword "Blacken Background" to receive the relevant method.

The shooting function of mobile phone is essentially the same as that of SLR camera, micro-single camera and card machine, but there are differences in structure and performance. If you want to achieve the same or similar blur effect as a SLR camera, the method used is roughly the same, so the method introduced below is also applicable to other cameras.

The so-called blur means that some elements in the composition picture are not allowed to be clearly presented, but only give a vague, illusory and vague feeling, so that some elements can be more prominent, clear and conspicuous. The essence is to use contrast means to further highlight the subject, express the theme and beautify the picture.

Fuzzy objects are generally fuzzy background, also known as fuzzy background; The future is vague; There is also the ambiguity of the periphery, the ambiguity of special positions and objects. But as far as shooting is concerned, only the background and foreground can be blurred, and other blurring needs to be realized by software later.

For example. If we are facing a steamed stuffed bun with steamed stuffed bun skin outside and meat inside, and the steamed stuffed bun skin is "translucent", we can vaguely see the translucent steamed stuffed bun skin in front and the translucent steamed stuffed bun skin behind, and the meat in the middle is the main body of the picture, and the meat stuffing body is clear and practical. This effect, that is, the empty foreground and background, will guide readers to focus on watching and appreciating the meat stuffing, while diluting and ignoring the observation of steamed stuffed bun skin; Is it possible to directly remove the steamed stuffed bun skin? No, because of the existence of steamed stuffed bun skin, it sets off the main body of meat stuffing and plays a role in setting off and comparing.

The task of blurring is to make the steamed stuffed bun look translucent.

How to blur the shooting picture? There are usually the following methods.

First, large aperture shooting. The aperture size not only determines the instantaneous light input of the camera, but also brings the imaging effect of large aperture (small value, such as 4.0, 2.8, etc.). ) and small depth of field; Small aperture and large depth of field. The depth of field is a bit like the longitudinal depth of meat stuffing mentioned above. Our ideal goal is to control the depth of field and the longitudinal depth in the range just before and after the meat stuffing, so that the meat stuffing is clear and the front and back sides of the meat stuffing are "translucent".

The aperture selection range of a mobile phone is similar to that of a camera. Generally, we can control it above 4.0, that is, the aperture is greater than 4.0 and the value is less than 4.0.

How to achieve the above goals with mobile phone shooting? Two ways. One is to use the "professional mode" of camera function to actively set a larger aperture; One is to turn on the "big aperture" function of mobile phone shooting.

If you use the first method, you need to pay attention to the coordination and balance between the aperture value and other parameters such as speed and sensitivity, because a good depth of field (or blur) is only one of the creative goals, and other parameters should also be taken into account. If the second method is adopted, priority will be given to shooting with as large an aperture as possible, and other parameters will be taken care of accordingly; As far as convenience is concerned, it is appropriate to select the "large aperture" function.

Second, shoot away from the background. In the same depth of field, the farther the background is from the subject, the more virtual the background image will be, and vice versa. Therefore, we must pay attention to this when composing and framing.

Fourth, post-software processing. This method mainly solves the problem that the surrounding and specific elements are further blurred.

The above four methods can be used together, and if they are well controlled, the effects of several methods will be superimposed, and an ideal picture will be obtained.

Is there any good way to "blur" photos with mobile phones?

There are two common ways to "blur" photos with mobile phones, one is free, and the other is expensive.

I'll tell you alone.

A "blur" method of shooting with a mobile phone without spending money.

There are two kinds of blur methods that don't cost money to shoot with a mobile phone. The first kind of pre-shooting, the second kind of post-repair.

I will tell you one by one.

1, taken earlier ↓↓↓↓

Blurring the background is actually enlarging the aperture. When the aperture is large, the background will naturally blur when it is deep and shallow. Some mobile phones can set the aperture value, while others can't. What shall we do? You focus on the subject. If you get closer, the subject will be photographed and the background will be photographed.

2. Late repair ↓↓↓↓

Now that the mobile APP is so powerful, who doesn't have a few photo retouching apps in their mobile phones?

Then come on! Fix it if you can't shoot it!

I'll just find an old APP——XX Xiu Xiu, and show it to you.

How to blur the background when taking pictures

Question 1: When taking pictures, how to make the picture bright, how to make the picture with blurred background bright, how to use light well and how to make the camera lens better. Of course, this is not clear in a few words.

A photo with a blurred background is called a small depth of field photo. To take such photos, you need to pay attention to the following points:

First, the camera must be a SLR camera. If it's a card machine or a mobile phone, forget it.

Second, use the maximum aperture. Some cameras have a maximum aperture of 1.8, others are 2.8 and so on. The smaller the aperture value, the larger the aperture. But it should be at least 2.8. If the maximum aperture of the camera is greater than 2.8, you can't take a photo with a small depth of field.

Third, under the premise of using the maximum aperture, we should also try to use the telephoto end to make the small depth of field effect of the photo reach the extreme. The telephoto end refers to shooting the farthest limit with a telephoto lens, rather than using a fixed focal head.

Fourth, the maximum aperture should match the corresponding shutter speed. If you can't master it yourself, you can use aperture priority mode, set the aperture to the maximum aperture, and then set it to aperture priority mode, so that the camera will automatically set the shutter. Then shoot with the telephoto end, so that you can take pictures with small depth of field.

Question 2: How to blur the background? Adjusting the aperture value of the camera can adjust the blurring effect.

The larger the aperture value, the smaller the depth of field, that is, the more blurred the foreground background;

The smaller the aperture value, the greater the depth of field, and the greater the foreground background blur;

This is why lenses with large apertures are more expensive. I hope I can help you!

Question 3: How to take a picture and how to take a blurred background is professionally called the depth of field problem. The effect that the landlord said is called small depth of field.

The so-called depth of field is the range that can still be clearly seen before and after the focal length is aimed at a certain point. It can decide whether to blur the background to highlight the subject or shoot a clear background. We can often see the blurred background (called small depth of field) in photos of flowers, insects and so on. However, when taking commemorative photos, group photos, scenery and other photos, the background is generally as clear as the subject (called large depth of field).

Aperture, the distance between the lens and the subject are important factors affecting the depth of field;

1, the larger the aperture, the smaller the depth of field, and the smaller the aperture, the greater the depth of field.

2. The longer the focal length of the lens, the smaller the depth of field; Conversely, the greater the depth of field.

3. The closer the subject is, the smaller the depth of field is, and the farther the subject is, the greater the depth of field is.

Therefore, the way to shoot a small depth of field is to use the telephoto end, use the maximum aperture and shoot as close as possible to the subject. At the same time, the subject should stay away from the background.

The landlord uses a SLR, which has nothing to do with the specific model, but with the lens. If the aperture of the lens is F 1.8, the lens size is about 80 mm. If the aperture is wider than F 1.8, the lens can be shorter, for example, 50mm；; And if the aperture is just normal, then the lens size should be close to the telephoto function (close to the equivalent focal length of 200mm).

Question 4: How to blur the background in 5s photography If you want to take a picture with blurred background, you need to put the camera of your mobile phone close to the object and click on the object you want to highlight, and the background will be blurred.

Question 5: When shooting people with a SLR, the background is blurred. How to set this phenomenon is called shallow depth of field, that is, the depth of the scene is small, so the foreground is clear and the background is blurred. There are three main conditions to realize shallow depth of field: 1 and aperture. The larger the aperture, the smaller the aperture value and the smaller the depth of field. The effect is not obvious. 2. focal length. The greater the focal length, the smaller the depth of field. The effect is obvious. 3. Object distance. The closer the camera is to the subject, the smaller the depth of field. The effect is very obvious. Therefore, according to the above rules, when shooting, you should use the largest aperture and the longest focal length, and then try to get close to the subject under the premise of both, and then try to keep the subject away from the background. This effect must be what you want. Besides, the photo of car optical flow you mentioned is very simple. As long as the ISO is set to 100, the aperture can receive about F8, and then put it on a tripod for a long time exposure. The exposure time can generally be about 4~8 seconds, depending on the actual light conditions.

Question 6: How to blur the maximum aperture of the background when taking pictures with a SLR camera (the longer the focal length of the lens, the better the blur effect, such as the same aperture, and the blur effect of 100mm is better than that of 50 mm).

Question 7: How to blur the background when taking photos with mobile phones? The mobile phone doesn't have that function, so it needs software to realize it.

Question 8: How to blur the background when shooting flowers? On the premise of not affecting the image quality, open the aperture, reduce the number of nails and reduce the feeling of irritability. Anyway, flowers don't move, and it's okay to expose them for a long time. The background should be as simple as possible, and black cardboard can be used as the background if necessary.

Question 9: How to adjust the focal length when taking pictures with a SLR camera so that the aperture can blur the background;

1, the larger the aperture, the shallower the depth of field (the stronger the blur);

2. The larger the sensor area, the shallower the depth of field; 3. The longer the focal length, the shallower the depth of field;

4. The closer the shooting distance, the shallower the depth of field;

5. Shooting with the same SLR camera, background blur = large aperture+long focal length+close range.

Question 10: How to avoid background blur when taking pictures? The setting methods of SLR background blur are: large aperture, telephoto, background as far as possible and shooting distance as short as possible. F7. 1 is a small aperture. The larger the f value, the smaller the aperture. It's easy to blur after this setting. If you don't think it's true, you don't need telephoto, don't be too close, don't set a small aperture, and stand far away and shoot. After you pay attention to the shooting technique of blurring the background, pay attention to avoid walking for a long time. In addition, the larger the aperture, the more light enters and the shorter the exposure time. I wish you success!

How to shoot the mobile phone? The scene behind is very vague.

If you use a Huawei mobile phone and the camera on the back of the phone is blurred, you can check the operation by the following methods:

First of all, ensure that the camera's focusing function is normal.

Select the professional mode, aim the camera at the subject, adjust the shooting distance (about 0.5m below 3X and about 2m above 3X) according to different multiples, select MF (manual focusing) as the AF parameter, and drag the slider left, right and back to observe the preview interface.

1. If the preview changes from clear to fuzzy, and then from fuzzy to clear, the camera's focusing function is normal. Please continue the investigation according to the following situation.

2. If the preview interface is always fuzzy, it may be that the focusing function of your mobile phone is not normal. It is recommended that you back up important data in advance (third-party applications such as QQ and WeChat need to be backed up separately), and bring the purchase voucher to the nearby Huawei customer service center for more help.

Second, make sure that the camera and laser sensor are not blocked.

Make sure that the camera lens and laser sensor are not blocked by foreign objects. Protective film, three-way protective cover or other obstacles may interfere with the sensor. Test the camera without installing the above items to see if the problem is caused by these items.

Third, be sure to shoot after the focus is completed.

1. When taking a picture, click on the subject with your finger to focus manually, and don't click the shutter button until the focus frame disappears, because this means that the camera has not finished focusing.

2. If you focus manually when recording video, the camera will lock the focal length to avoid unclear or unstable images when the mobile device changes the scene or position. You may need to manually refocus the camera again. To make the camera focus automatically, please avoid manual focusing when shooting video.

Fourth, make sure to use the default zoom factor.

If you focus manually when recording video, the camera will lock the focal length to avoid unclear or unstable images when the mobile device changes the scene or position. You may need to manually refocus the camera again. To make the camera focus automatically, please avoid manual focusing when shooting video.

Fifth, be sure to keep the phone stable when shooting.

If your subject moves quickly, or your mobile phone keeps moving during shooting, the camera will not focus properly, and photos or videos may be blurred. It is recommended that you hold your mobile phone steady when shooting and use a tripod if necessary.

6. Make sure to shoot at a reasonable distance.

Due to the shallow depth of field, some mobile phone cameras may not be able to focus correctly when taking close-up photos.

1. When using the large aperture mode, make sure that the subject is at least 20cm (8 inches) away from the phone and in the center of the screen.

2. When using the super macro mode, please keep the distance between the mobile phone and the subject at 2.5- 10 cm.

3. When shooting with telephoto, please keep the distance between the mobile phone and the subject at least 2 meters.

Seven, other special mode shooting skills

1. In night mode and streamer shutter mode, the camera needs a long exposure time, so any movement of the camera or the subject may lead to unclear photos or videos. Please keep the phone stable when shooting, and use a tripod if necessary.

2. Large aperture or portrait mode will automatically blur the background [f3] and make the subject stand out. Background blur is normal in this shooting mode, please feel free to use it.

If you are still confused after trying the above contents, please contact Huawei's customer service hotline (950800), or back up your important data in advance (third-party applications such as QQ and WeChat need to be backed up separately), and bring the purchase voucher to Huawei's customer service center for further help.

Related links are as follows: Huawei Customer Service Center makes an appointment for service delivery service maintenance spare parts price inquiry.

How to shoot the effect of real before virtual, virtual before real?

1. Fix the machine with a tripod. The machine is set to manual focusing and the aperture is set to manual maximum.

2. Take trees as the shooting object, select two trees whose longitudinal distance is more than 10 meter, and measure the focusing effect with the clarity of the trunks of the two trees as the reference.

3. First put the machine near the trunk near the foreground (about 5 meters away from the trunk), and keep the near trunk as the foreground and the far trunk as the background in the picture. Zoom the lens to the telephoto end (zoom to the nearest one), then adjust the focus ring so that the focus falls on the proximal torso, and then the distal torso should be blurred; Then start the camera and record 10 seconds.

4. Manually adjust the focus ring evenly, and move the focus to the far torso (try the focus rotation angle first) until the far torso is clear, and then the near torso should be blurred. Stop after recording 10 seconds.

This can achieve the effect of changing from near reality to far virtual. And vice versa,

How to use a digital camera to shoot the real front and the unreal back?

As we all know, the virtual background makes people in the depth of field, while the background is out of the depth of field. Shallow depth of field can easily achieve this goal.

Simply put, the depth of field is directly proportional to the aperture value, directly proportional to the square of the shooting distance, and inversely proportional to the square of the lens focal length.

To achieve the effect of shallow depth of field, it is to use a large aperture and a long focal length, so that people are close to the background and people are far from the background.

SX 1 10IS is a camera with a small photoreceptor size, and the controllable depth of field is relatively small, so the effect is difficult to achieve ideal.

In actual shooting, the shallow depth of field obtained by telephoto lens has a poor sense of space. Although the fuzzy background is beneficial to highlight the main body of the character, the picture is not flat and three-dimensional, lacking environmental atmosphere and sense of space, and is only suitable for simply expressing the figure or appearance of the subject.

A truly pleasing picture of the combination of reality and reality requires a strong environmental atmosphere and a sense of space. One is the need for a larger frame, the other is the need for a wide-angle head with a large aperture, and the third is the need to pay attention to framing and composition.

SX 1 10IS can't do the first two points, which is congenital deficiency.

When taking pictures, how can the foreground be clearer and the background be blurred?

The most practical and effective method is to increase the aperture and change the depth of field. For example, the aperture is 3.5, and the depth of field is only 1 m, which means that the objects behind the background are only 1 m, and the objects below 1 m are blurred.