Dual Cameras in Smartphones

28 Sep 2017

Dual Cameras in Smartphones

Smartphones featuring dual cameras are becoming more common, and they will be integrated in more devices in future.

Mobile phone manufacturers provide dual cameras to help smartphone cameras work more like a professional digital single lens reflex (DSLR) cameras.

The main reason for the popularity in dual cameras is physical necessity. It is not possible to have a professional grade zoom lens in a smartphone as today's
phones are too tiny. Alternatively, creating camera zoom features in software quickly runs into limits of picture quality. But as lens
hardware decreasing in cost, adding another physical camera is now easy, with software switching between the two and interpolating images from both cameras.

With two slightly different types of sensors gives better dynamic range, the range of light and dark in scenes within which a camera can capture detail. Higher dynamic range and information about the scene give sharper details and richer colour.
Depending on real optical lenses rather than software to zoom reduces the digital noise that makes images grainy. Also, given less noisy images with more image data, it is possible to improve the quality of software zoom.

The second rear camera provides a much more vast number of possibilities. With two slightly different viewpoints means live images can be processed for depth
information per pixel captured, so that images get an extra dimension of depth data.
Since the distance between the two cameras is known, software can make triangulation calculations in real time to determine the distance to corresponding points in the two images.

The latest iPhone uses machine learning algorithms to scan objects within a scene, building up a real-time 3-D depth map of the terrain and objects. iPhone uses this to separate the background from the foreground to selectively focus on foreground objects. This effect of blurring out background details, known as bokeh, is a feature of DLSRs and not normally available on smaller cameras such as those in smartphones. The depth map allows the iPhone to simulate a variable aperture which provides the ability to display areas of the image out of focus.

More smartphones will have dual cameras for better picture quality and user experience.

Recent Posts

HTC U11 life Camera Review

LG V30 Camera Review

GPU in Smartphones

Biometric authentication in smartphones

Important Features of Android Oreo

Optimization of Android Phone

LG V20 at a glance

Important Features of Huawei Honor 8

Facts about Android data stored on external SD Card

Advantages and disadvantages of limiting background processes in Android

Oppo F1s launched with 16MP selfie camera

First official Galaxy Note7 advertisement confirms some specifications

Risk of installing CyanogenMod on unsupported phones

Difference between Opera Mini and Opera mobile Browsers

Best Android browsers of 2016

Sony Xperia X Performance at a glance

How Google Maps estimate your location without GPS

Why Android have AntiVirus apps while they are few for iOS

iPhone 7 could be waterproof and can feature touch sensitive home button

Key features of iPhone SE

Can you upgrade the RAM of an Android device

How WhatsApp send audio files or video clips instantly

Best Practices for Mobile Phone Battery

How to erase the data of Broken Screen Android Phone

Location of google play downloaded apps in your mobile phone

Weather Widget App Tips and Tricks

How to configure the Email app on an Android device

Redmi Note Prime with 5.5-inch display and 3100mAh battery launched by Xiaomi

LeTV creates new record by selling 1 million smartphones in November

WhatsApp for Android get new features

Waoweo.com © Copyright 2017, All Rights Reserved.