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If we want new phone cameras twelve years ago, we will find that the developments are very important and that the differences between our evaluation of the cameras of our phone are radically different, until here the Camera evaluation is very relative and follows the taste of each individual On the other hand, the evaluation method is different. However, there are many things that I consider to be very serious mistakes made by many people during their selection and rating of a phone based on their devices.
Our article today will talk about how to evaluate a camera from a phone and what are the differences between cameras.
First: the number of megapixels and the sensitivity size
The rule on this subject was simple and easy, as the number of megapixels of the camera increased the better. We simply found the old Nokia phones like Xpress Music, of which I was one of the most admirers, some having an 8 megapixel camera, which allowed us to buy these phones directly, although the importance of time is very simple. But most phones have about 12 megapixels, whereas SoC (System On Chip) is a system on the chip, because this chip does not contain only for computer processing but also a standalone graphics processor and it is complicated and interconnected. I'll tell you why:
The pixels are placed in the so-called sensor and this sensor follows the rule of "the greater = the better" and the greater the sensitivity, the greater the number of pixels that we can put it. But the pixels themselves vary in size and this gives us two variants of the equation, which complicates things.
Also on the other side we know that the pixels are what shape the image and to show us this picture clearly and correctly we have to believe enough light to illuminate each pixel.
In the sense that if we compare the sensitivity of a camera of the same size, one to 20 megapixels and another to 12 megapixels, we find that the second is a little better under conditions of brightness (if we do not take into account all the other variables we will mention in the article), we do not need a large amount of light to illuminate the 39, image and appearance, regardless of the noise resulting from the lack of sharpness of the image.
We conclude from the above that it was not two cameras have the same sensor size, which is clearly stated in the device data sheet as 1 / 2.33 and the size of the pixels in the micron as 1.55 microns. The best is the balance between the relatively large and relatively large sensor size and the pixel size. It's the beginning when it comes to comparisons.
II Opening or Opening: 19459004
We are talking here about two factors: Not very important or not much to see on Ka The second is the value of F or F-Value, which is simply the 39, aperture of the camera lens.
In other words, I have already told you that the image composed of pixels of these pixels must be illuminated so that the image appears clearly. The lens or the camera sensor should be wide enough to express because it's a better term than the bigger one because the aperture is circular and we want to increase it. Opening, that is, increasing its width or increasing its diameter. The LG V30, for example, carries a rear camera with a f / 1.6 lens slot and the lower the number, the better is the camera It is important to note that such a lens aperture that f / 1.8 in the camera phones does not match the f / 1.8 aperture on DSLR cameras because the sensor size is quite different.The results obtained from the two cameras are very different, by For example, a camera with a focal length of 26 millimeters, for example, tells us how much we need to move away from the object we want to photograph to get good isolation (or Bokeh effect). The element in the foreground is sharp and clear.]
The insulator here really controls through a hole The objective and the value of the focal length By balancing these two values, we can get great pictures and the amount of insulation is excellent. It should be noted here that not all cameras are physically isolated with one or two cameras, but there are many cameras that use the software features to get more insulation because it is popular and the status of Portrait is very important on our phones. Portable.
The amount of insulation or blur can be shallow with little insulation, which is the approach sought after by many professional cameras, while the phone's cameras focus on deep deep insulation, which provides a large amount of insulation. Isolation
The comparison here is for personal taste After examining the number of apertures, the focal length, the sensitivity and the size of the pixels, some people appreciate the dramatic effect of the large and vast isolation of most pictures, while others prefer light insulation. Or under poor lighting conditions, this can be compensated by lengthening the lens closing time or by controlling what is called the shutter speed, through which one can let in as much light as possible but requires a solid installation.
Third: secondary cameras
The secondary cameras vary in type and are divided into a two-part year, the telephoto camera and the monochrome camera, as well as the big-screen lens
The Telebotu camera is used for optical zoom and usually carries a rather narrow focal length f / 2.4 or f / 2.2 according to the camera and is widely used to achieve the Bokeh effect or the isolation of portrait and other images. By users larger than actually used as camera capable
The monochrome camera is a camera that is not RGB but only black and white This camera uses additional information about the image and gives him more details to increase the sharpness of the image, and this type of camera is preferred
About the wide lens that we rarely see on phone cameras that gives the user a corner to take a big picture in the sense that we can show a larger number of people or objects as part of the image in relation to the lens normal. I have the impression that large lenses are very useful but telephoto cameras have dominated the situation here: we usually see these cameras on the front cameras to take pictures silphy
Here we n & # 39; There is no preference for a type. Telephoto lenses work only in good lighting conditions and some monochrome cameras do not add much value to the image because the software that combines the two images of both lenses is weak or slow.
So, the comparison between two phones carrying two rear cameras do not have Easy to remember because of the wide variety and variety of cameras and quality, but personally I see that the referee is always due to image samples and not to numbers.
The second type is the optical installation, which depends on the physical mechanism to install the camera lens from the software or video clip image for an electronic installation.
During It is semi-floating with very small engines with attractive sensors and a microcontroller. These things help move the lens in the opposite direction to the camera's vibration motion: for example, if my hand vibrates the phone to the right, the microcontroller will send an order to the small motors by moving the lens to the left and so on. This fixation is called axis 2, sensitive only to the vertical and horizontal axes, weaker than the so-called 4axis type, sensitive to rotational movements as well as to the vertical and horizontal axes, giving more precise and precise readings of the angles of rotation. rotation.
These gravitational sensors are very fast and give constant readings to the controller which also directly controls the motors to move the lens.
Of course, the optical installation is much better than the electronic installation and we find the utility of both. In the first two cases:
First: the case of shooting in poor lighting conditions, here we must reduce the time of opening and closing of the lens and the other side to allow the greatest amount of light. Avoid this confusion as much as possible.
The second case is the case of video shooting videos especially the front camera and find vloggers This function is very useful for them. Sony has introduced a Sony XA2 Ultra with two front cameras installed visually while the rear camera is installed electronically only!
It is worth mentioning that Google on its Pixel 2 phone combines the optical and electronic setup together (when shooting video) Get the best of both features. Powered by artificial intelligence, video stabilization in your phone provides a great level of stability. We shot the following video clip using the Pixel 2 XL phone, where you can see the smooth motion and almost no vibration despite shooting while walking and holding the phone in your hand:
V. Color Generation
Why the color in some phones seems "warmer" than others and some of them seem "very cool" is actually a color profile that is a set of presets or d & rsquo; Instructions for manipulating images taken to look like a particular appearance. Samsung Saturation: Samsung aims to increase color saturation
The preference here comes down to personal taste, I personally find the color profile of Sony cameras very distinctive.
The color color of Sony is a little closer to reality and far from being an increase in saturation or color change. The colors also vary on the screens because the screens also have their own color profile and special criteria to evaluate their accuracy and their proximity to the actual colors. Fortunately, we have a calibration technology or calibration to adjust the color differently. Some companies are part of the system options to control B However, when talking about phone cameras, the choice of HDR is very important and varies from one device to the other: some cheap devices do not have to. do not improve colors and are not saturated enough, while some phone cameras can restart images. And to reduce the intensity of some bright colors like the color of the sky or other to bring more details into the picture, and stay here the criterion is the success of the camera in the life of the pictures in this situation and the balance between the time taken by the camera Where the moment of capture r The HDR takes about 7 seconds! In addition, do not forget the white balance or the white balance, which in my opinion affects the phone's camera a lot because the white color of the most important colors must be handled correctly so as not to appear white or abnormal.
Do not forget the color of the skin, not all cameras are able to capture the same degree of skin color, which I think is very important, especially on cameras. The closest thing to reality is in the "beauty" situation here of the
Another point here is that there are phone cameras that give different colors when compared to the video compared to the color taking pictures, which is only found in inexpensive devices but it's something that should be noted
V. Program Features
The official camera applications in mobile phones differ in their imaging features. For example, we can talk about features such as exposure control, shutter speed and so on. For example, on my old Sony Z1, I could not change some simple settings that I needed earlier when shooting, even after using a professional paid external application for photography, c & # 39; is something to keep in mind when evaluating cameras. With different camera settings, some cameras allow us to implement the HDR option by pressing a button at the front of the application while another huata forces us to dive into the settings to access such an option.
Speaking of the different situations of the phone cameras, there are many companies that offer very nice features in the Camera implementation, like what Huawei does in a phone like Nova 2 Plus with the mode that allows you to take a photo The 3D panoramas, both from the front and the back of the camera, Sony also has many features, such as 3D scanning and the creation of 3D stickers as well as enhanced reality effects.
In my opinion, the standard of compromise here is the speed of the camera's implementation during the first opening and then the second image capture, as well as the ease of access and mobility. options.
VI Professional or Manual Situation vs. Automatic Mode:
Another thing that I think a lot of people confuse with the phone cameras is to choose the right situation while looking at and examining samples of them. images. Camera Any good phone should be able to take excellent photos in automatic mode without any interference from us, and I can not interfere in it, but if we are interested in a large field of photography, I do not think that we will be satisfied As the work situation is the basis, not the reverse, as a simulation of the experience of design [19459051]
is simply a personal opinion, but comparing, you should compare professional with automatic and automatic with automatic and the best camera is also on the other side, I was able to secure as much as possible I'm annoyed that some phone cameras put you in professional mode away from professional and have only a few options simple ones such as ISO or White Balance. I would say that the user test smoothly will give preference to any camera even if the results are not as good as other cameras.
The disadvantages of the small megapixel population:
I spoke in the first article to compare the sensitivity of a camera of the same size and the impact of megapixel size to get images brilliantly illuminated and full of details. A camera with a megapixel of more than a year would be more effective at sharpening images and would avoid sharpening the program, which helps us a lot when we zoom in or out.
But I think modern cameras are well balanced Clear images of good intensity.
Abstract:
Abstract The evaluation of telephone cameras is not simple, it takes a lot of time and studies the image samples as it is the first and the last reference and does not never compares to the numbers. While taking a photo has a big impact on his decisions when shooting and his final opinion, some people may be reluctant to buy the phone because of the bad experience of the official app or the phone. lack of essential features such as electronic installation Say.
Tell me your opinion, do you see that the comparison of the phone cameras at the moment we see on YouTube and others is right? How do you rate and compare phone cameras? Tell me your opinion in the comments .
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