When Taking A Portrait Mode Photo

how iphone works
When Apple introduced the iPhone 7 Plus in 2016, it contained a new camera feature that quickly became one of the most talked about - and copied - in Apple’s lineup: Portrait mode. Portrait mode uses the phone’s dual cameras and Apple’s software to mimic the quality you would get from a DSLR camera, which keeps the subject of the photo in focus and slightly blurs out the background. These days, other smartphone makers like Samsung and Google have their own version of portrait mode, and even Instagram has added a similar feature to its app.

Portrait mode is only available on recent “Plus” models of its iPhones — iPhone 7 Plus, iPhone 8 Plus, and iPhone X — for a simple reason: Apple’s version of portrait mode requires dual cameras. Soon after Apple introduced portrait mode in 2016, the feature started popping up on other flagship phones like Samsung’s Galaxy Note 8 (called Live Focus) and the Google Pixel (called Lens Blur). In the case of the Pixel and Pixel 2 phones, which only have one lens, Google relies on software to achieve a portrait-mode quality.

Apple’s iPhones require two lenses to make it happen - at least for now. So if you buy the iPhone 8, for instance, it will not have the ability to take portrait mode photos. Apple’s portrait mode requires two lenses because each lens is different: One is a 12-megapixel wide-angle lens, while the other is a 12-megapixel telephoto lens. When taking a portrait mode photo, the two lenses serve different purposes. The telephoto lens is what actually captures the image.

While it’s doing that, the wide-angle lens is busy capturing data about how far away the subject is, which it then uses to create a nine-layer depth map. That depth map created by the wide-angle lens is crucial to the end result, because it helps Apple’s image signal processor figure out what should be sharp and what should be blurred.

The image above demonstrates what a standard iPhone photo looks like (left) and what a portrait mode photo looks like (right). At a quick glance, the image on the right seems like it just has a totally blurry background, but this is where the depth map comes into play. Portrait mode works best on people and still objects, and there are some limitations to the feature: the amount of light present, and your distance from the subject.

Portrait mode doesn’t work well, or sometimes at all, in low light. If it’s too dark for the feature to work, a message will appear within your camera app letting you know. Portrait mode also won’t work if you’re too close to the subject you’re trying to capture, which your phone will alert you to as well.

In order to take a portrait mode photo, you can’t be any closer than 19 inches away from your subject. It’s also worth noting that portrait mode works best when there’s a lot of contrast between the subject and the background. If you’re shooting a white coffee cup on a white counter, for instance, the sensors may have trouble deciding what should be in focus and what should be blurred. Apple wants to make it as easy as possible to use Portrait Mode — and that includes removing the effect from a photo if you don’t like how it looks.

If you take a portrait mode photo but change your mind, you can remove the background blur after the fact. Just choose the photo, tap the edit button, and then tap “Portrait,” which will be at the top of your screen. The photo will then return to looking like a standard iPhone shot. Portrait mode is currently available on iPhone 7 Plus, iPhone 8 Plus, and iPhone X. The latter two phones also have Portrait Lighting, which artificially adjusts the lighting around your subject to add different effects. And if you have an iPhone 6s Plus, you may be wondering whether you can take portrait mode photos too. The answer is, unfortunately, no - Apple didn’t add the dual lens camera to its “Plus” devices until the iPhone 7, so you’re out of luck.

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