Last month I have written an article about the phone fill light science articles, to analyze the reasons behind the xenon flash less and less.In fact, the last two years with the overall level of mobile phone camera up, the other one had no people Pay attention to the function of the degree of concern is also followed by more and more it is the mobile phone camera focus module.
Your cell phone focus so fast thanks to these high-tech
Early in the year when people use smart phones to take pictures, I am afraid that few people will pay attention to how the camera is focusing on the simple click on the screen looking at the camera to complete their own focus and then click a photo to complete the matter.Only the last year or two, Focusing speed of the word was gradually surfaced, 0.5 seconds, 0.3 seconds, 0.1 seconds or even 0.03 seconds what the 'speed focus' all of a sudden all out, so that consumers feel confused and confused.
Today's press conference on the speed of this parameter is essential
Now I'll give you a detailed look at the current focus of several mainstream camera mode, as the focus of their time, sorry, I made it clear that I can not be measured, but I remind you here, manufacturers at the press conference or product copy on the promotion The so-called focus speed, we look like, the actual time constraints of the shooting speed of the factors too much, which we will be mentioned later.
We first talk about the relative number of the original focus - contrast focus. Contrast focus principle is based on the contrast of the focus of the screen changes, looking for the maximum contrast when the lens position, which is the exact focus position.
Contrast-Focusing (gif motion source pixinfo.com)
We take a coin, for example, the beginning of the screen is a virtual focus state, then move the lens, people can see the coins in the screen gradually clear up until a certain position (focus state) coins the most clear, but the camera model The group itself is not aware at this time has been coke is completed, the lens will continue to move, then people will see the coins and become blurred when the camera module was aware of the lens 'passing the station', so back To a clear focus of the location, so a focus on the complete.
Gif on the top of the Chinese interpretation of the dynamic map (picture from the new photography)
In fact, look at the above paragraph we can understand the contrast of the disadvantages of focusing, and yes is time-consuming too long from the beginning of the lens focus to the end of the focus has been moving to complete the 'walk through the station' after the fallback process is To increase the focus of the trip to the user's intuitive feeling is the focus slower.Also because of the contrast to detect the contrast of the screen, once the subject is close to the background color (such as in front of a white wall to take a piece of white paper) In order to achieve more difficult to focus.
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