8/11/2023 0 Comments Smart shooter multi camera example![]() ![]() ![]() You can see this for yourself by holding up a finger in front of your face and noticing how much it appears to move when you look at it first with one eye closed and then the other, compared to a distant object that hardly seems to move at all.Īdding the ability to estimate the depth of objects in a scene allowed the introduction of specialized Portrait modes in multi-camera phones to keep the subject sharp, while giving the background a pleasing blur. ![]() Objects close to the cameras will be quite far apart in the two images, while objects further away will appear much closer together. This process starts by measuring how far apart objects are in the images from the two cameras-an effect called parallax. The longer effective focal length of the telephoto camera also makes for less distorted faces when shooting portraits, as you can photograph the subject from twice as far away for the same framing, removing some of the unpleasant effects of photographing people close-up using a wide-angle lens.īy having two slightly offset cameras, it is also possible for the phone to estimate the depth of objects in the scene. The same scene captured with the phone’s ultra-wide-angle camera.īetter telephoto and wide-angle images are only the beginning of what smartphone makers have accomplished with the addition of a second camera module. The results are definitely not as seamless as when using a dedicated zoom lens on a standalone camera, but it’s amazing that it’s possible at all for such a small device. Because the two modules are slightly offset from each other, the preview needs some realignment to minimize the shift in the image when the phone switches from one camera module to the other. For that to happen, the images from the two modules need similar exposure, white balance, and focus distance. For example, the preview image displayed to the user is taken from one camera module or the other, but needs to switch smoothly between the two modules as the user zooms in or out. Images from the two camera modules can be blended to create improved results even at non-native focal lengths, but this presents some unique image processing challenges. This provides a better result than cropping and scaling the image from the main camera. At the native focal length of the telephoto camera, the camera uses a typical pipeline to process and render the image at the sensor’s native resolution. The most obvious advantage of having a dedicated telephoto camera module is better images at long focal lengths. The same scene shot using the Huawei Mate 20 Pro’s 8MP 3x telephoto module. Most-including Apple, OnePlus, HTC, Xiaomi, Motorola, Nokia and Vivo models-use a traditional camera module paired with a 2x telephoto module, although the Huawei Mate 20 Pro and P20 Pro make use of a 3x telephoto. So over the last two years, almost all flagship phones have moved to a dual-lens-and-sensor design for their rear-facing camera instead of trying to add an optical zoom. The physics of lens design make it very complex to fit a zoom lens into the thin body of a high-end smartphone. Starting with Samsung’s Galaxy S4 and S5 Zoom, a few specialized phones had an optical zoom (made possible by their bulky design), but most popular models offered only a limited-quality, digital zoom capability that used some combination of cropping and post-capture resizing. ![]() Until the introduction and market success of the Apple iPhone 7 Plus in 2016, zooming in on a smartphone was almost always entirely digital. In each case, it is important to keep in mind that it is still early in the development of multiple-camera smartphones, so expect to see rapid progress in the technology and the features it enables over the coming years. We’ll take a look at how multiple camera phones have evolved, at how they’ve improved the photo experience for phone owners, and at the challenges that phone makers have had to tackle to make them work. Having multiple cameras has made an array of new features possible-zoom, better HDR, portrait modes, 3D, and low-light photography-but it has also presented new challenges. The small Z-height, as the industry refers to the thickness of a phone, has caused designers to make use of the larger width and height of phones by adding additional cameras to their designs. However, users also want thin phones, which greatly limits the size of the individual camera modules that can be used. With the growing importance of camera performance to smartphone makers and users, manufacturers have worked hard to add features and to improve image quality. ![]()
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