Real shot verification double color temperature flash can correct white balance?

This digest from the Zhongguancun author2015-02-11 05:24:00[Zhongguancun Online original] Steady subscription  | Zebian: Wang Yanan http://mobile.zol.com.cn/507/5072482_all.html#p5072605 1double color temperature Flash is gaining popularity Now the hardware specifications of mobile phone cameras are getting higher, and some fresh nouns are slowly entering the field of vision, one of which is the double color temperature flash. The iphone 5s, released in 2013, first used this seemingly unfamiliar technology, but actually introduced it to the Android camp or HTC One M8, starting with a growing number of smartphones using a dual color-temperature flash as a complement to the hardware, even to the 2015-year-old that even the thousand-dollar machine began to use. Can a dual color temperature flash really correct the white balance? Almost all manufacturers in the new machine launch of the PPT will mention a double color temperature flash of an "advantage"-correction white balance. But as a user if all things to listen to the manufacturers propaganda is obviously not reliable, so I decided to take a real shot of the way to verify whether the double color temperature flash can really play the role of correcting white balance. Dual color temperature Flash has become one of the selling points of the conference We know that the phone's flash is generally led-based, the advantage is that it can be solid as a "flashlight", while the power consumption of the higher brightness of the xenon flash low on many, but the shortcomings of a single light-fill color easily caused by the problem of white balance, even if the dual LED flash is difficult to solve the problem. Dual color temperature Flash single piece is Amber The dual-color-temperature Flash is an amber flash in a normally white flash (watch to see that all the new colors are amber), which provide different color temperatures, so that the color after the fill is closer to the actual color of the subject, which has a positive effect on improving the shooting performance. Product: Phantom Blue Note (mobile 4G) Meizu Mobile2About color temperature: The camera didn't cheat you. About color temperature: The camera didn't cheat you. Now that we mention the color temperature, let's look at the concept of color temperature: Generally speaking, the color temperature is a measure of the light color of the light source, in Kelvin (K). The color of the light emitted by the light source and the blackbody at a certain temperature radiate light hue at the same time, the temperature of the blackbody is called the color temperature of the light source. In blackbody radiation, as the temperature is different, the color of the light is not the same, the black body is presented by the red-orange-yellow-white-bai-blue white-the gradient process. Ambient color temperature in different scenarios (source see below image) Generally speaking, the lower the color temperature, the closer the colors become red, the opposite is the direction of blue. But there may be people who ask why the color temperature setting in the camera is higher than the number of K, the more red, the lower the more blue it? SLR cameras can set different color temperatures The camera adjusts the user's color temperature before performing the shooting task, attempting to make the white object appear to be of the correct white color. If the user sets the color surface adiabatic of the subject is low (without using automatic white balance), the camera will reverse compensate for the color temperature in accordance with the user's preset color temperature intent to make the white balance accurate, so the photo is actually more in favor of cold color. Raw Color Temperature value 5050 Pull the color temperature to 2800 visible image cold Pull the color temperature to 9500 visible image warm For example, in a cloudy environment, the ambient color temperature is relatively high (compared to sunny overall color blue), then if the intention to restore the subject itself color should strengthen warm colors. Due to the internal reverse compensation of the camera factors, the user should increase the value of K or directly in the White balance option to select "Cloudy", so that the photos taken out in the color is actually a partial warm compensation, but also closer to the visual effect. Product: Phantom Blue Note (mobile 4G) Meizu Mobile3How to see the effect of double color temperature flash test How to see the effect of double color temperature flash test Now let's get back to the point of seeing if the dual-color-temperature Flash has the effect of correcting the white balance compared to a normal flash. The author chooses two mobile phones (model please self-repair), one for dual LED flash another is a two-color temperature flash, in the dark indoor and effective flash distance shooting near objects. the first photo in each of the following groups comes from a dual color-temperature flash and the second one from a dual LED flash . In the comparison of two sets of small dolls, and do not say the intensity of the flash, it is true that the color of the doll face to restore the two-color temperature flash to more accurate, a group of coins on a pair of double-color temperature flash relatively more can show a little metal texture, as for the other photo of the virtual focus of the weak focus. Focal length: 4mm Iris: f/2.2 ISO sensitivity: 216 Exposure time: 1/33 exposure compensation: 0EV White balance: Auto Focal length: 4mm Iris: f/2.0 ISO sensitivity: 1700 Exposure time: 1/14 exposure compensation: EV White balance: Auto Focal length: 4mm Iris: f/2.2 ISO sensitivity: 202 Exposure time: 1/33 exposure compensation: 0EV White balance: Auto Focal length: 4mm Iris: f/2.0 ISO sensitivity: 3100 Exposure time: 1/14 exposure compensation: EV White balance: Auto Focal length: 4mm Iris: f/2.2 ISO sensitivity: 110 Exposure time: 1/110 exposure compensation: 0EV White balance: Auto Focal length: 4mm Iris: f/2.0 ISO sensitivity: 1300 Exposure time: 1/14 exposure compensation: EV White balance: Auto The overall dual-color-temperature flash, as mentioned in the introduction of its function, is able to restore the true color of the object relatively accurately. Because most smartphones cannot customize the color temperature value, the effect of a dual-color-temperature flash is even more noticeable in the nighttime environment. However, due to the limited flash distance, it is more suitable for near-fill light and has little effect on large scene shooting. Of course, in any case, the popularity of the dual-color temperature flash is obvious, especially in the application of the thousand-yuan machine is to allow entry-level users to benefit, the charm of technological progress may be reflected in this.

Real shot verification double color temperature flash can correct white balance?