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Showing posts with label Apple iPhone. Show all posts
Showing posts with label Apple iPhone. Show all posts

Sunday, 29 April 2018

How Facial Recognition Systems Work?

How Facial Recognition Systems Work ?Steps involved in facial re cognition process, Techniques for face acquisition,Applications of facial recognition,Face recognition with AI

In Facebook and other social media sites , you might have noticed that it has the ability to recognize people's faces. In group photos peoples’ faces are recognized and tagged. This is just one example of high-tech facial recognition software. Facial recognition is used in lot of areas like security systems, access control, identity verification etc. Modern smartphones uses facial recognition to secure your data from unauthorized access. Here is How Facial Recognition Systems Work.

How we recognize other people’s faces? ,Human faces have certain qualities you recognize. The spacing of eyes on a face, the position and width of a nose, the shape of a hairline and chin -- these are all things that you unconsciously use to recognize someone’s face. A computer uses same method to identify faces.

How face recognition algorithm works?

Like other “biometric” identification systems, facial recognition examines physical features of a person’s face in an attempt to uniquely distinguish one person from all the others. Other forms of biometric recognition include the very common fingerprint matching, retina scanning, iris scanning and voice recognition.
A facial recognition system measures the overall facial structure, including distances between eyes, nose, mouth, and jaw edges. Each human face has approximately 80 nodal points. Distance between these nodal points are measured and stored. These measurements are retained in a database and used as a comparison when a user stands before the camera.

Some of the features measured for facial recognition are:
  • Distance between the eyes 
  • Width of the nose 
  • Depth of the eye sockets 
  • The shape of the cheekbones 
  • The length of the jaw line 
These nodal points are measured creating a numerical code, called a faceprint, representing the face in the database.

Five steps involved in facial recognition process are
  • Capture - a physical or behavioral sample is captured by the system during enrollment 
  • Extraction - unique data is extracted from the sample and a template is created 
  • Normalization: Normally face image is captured at different angles and different distances gives different measurements. These values needed to be normalized before comparing with the stored template. 
  • Comparison - the template is then compared with a new sample 
  • Matching - the system then decides if the features extracted from the new sample are matching or not 

Techniques for face acquisition

Traditional:In this method landmarks, or features, from an image of the subject's face are extracted. For example, an algorithm may analyze the relative position, size, and/or shape of the eyes, nose, cheekbones, and jaw .These features are then used to search for other images with matching features.In this techniques facial recognition camera used is a normal camera.

3-Dimensional recognition:Three-dimensional face recognition technique uses 3D sensors to capture information about the shape of a face. This information is then used to identify distinctive features on the surface of a face, such as the contour of the eye sockets, nose, and chin. It can identify a face from a range of viewing angles.Three-dimensional data points from a face vastly improve the precision of face recognition.
Thermal Cameras:Input for facial recognition can also be captured with Infrared thermal cameras. In this cameras will only detect the shape of the head and it will ignore the subject accessories such as glasses, hats, or make up. It uses low-sensitive, low-resolution ferro-electric electrics sensors that are capable of acquire long wave thermal infrared (LWIR). Fusion of LWIR and regular visual cameras has greater results in outdoor probes.

Applications of facial recognition

Social Media :Social media platforms have adopted facial recognition capabilities to diversify their functionalities in order to attract a wider user base amidst stiff competition from different photo tagging.
Mobile Technologies  ,Face ID :Apple introduced Face ID on the flagship iPhone X as a biometric authentication successor to the Touch ID, a fingerprint based system. Face ID has a facial recognition sensor that consists of two parts: first module that projects more than 30,000 infrared dots onto the user's face, and a second module that reads the pattern. Infrared sensors are used to ensure the camera is scanning your actual face and not a photo or 3D model. The pattern is then compared with confirm a match with the phone owner's face already stored in the phone. Apple’s Face ID also depends on AI(Artificial Intelligence) programs to improve the accuracy. Many other phones like Vivo V9 also comes with built in facial recognition.
Free facial recognition apps and facial recognition software are available for download and and use in mobile phones and PCs. But they are of limited accuracy.

Facial recognition in Security services :Most useful application of facial recognition systems is in security systems. It can be used in large open spaces like airports, arenas and shopping malls.

Advantages of facial recognition over other biometric technologies.

Face recognition technology is the least intrusive and fastest biometric technology.

Limitations and drawbacks of Facial Recognition

Poor resolution images and poor lighting can reduce the accuracy of face-scanning results.
Different angles and facial expressions, even a simple smile, can pose challenges for face matching systems. 

Facial recognition loses accuracy when the person is wearing items like glasses, hats, scarves, or hair styles that cover part of the face. Makeup and facial hair can also pose issues for face detection programs..

Facial recognition algorithm using Artificial Intelligence

In modern facial recognition programs Artificial Intelligence and neural network algorithms are blended to get better results. Neural networks learn from examples and respond to inputs it’s own based on the knowledge it acquired through examples. Even if input images are of poor quality , artificial intelligence algorithm can distinguish and identify images accurately.

Sunday, 17 September 2017

Exciting New features of iPhone 8 and iPhone 8 Plus

iPhone 8 and iPhone 8 Plus launched.What are the new exciting features and specs?

Finally iPhone 8 is out.iPhone 8 is available in two variants.iPhone 84.7-inch display and iPhone 8 Plus 5.5-inch display.What is new in iPhone 8 and iPhone 8 Plus?What changes they have from iPhone 7.?
iPhone 8 and iPhone 8 plus
Apple claims,
iPhone 8 introduces an all‑new glass design. The world’s most popular camera, now even better. The smartest, most powerful chip ever in a smartphone. Wireless charging that’s truly effortless. And augmented reality experiences never before possible. iPhone 8. A new generation of iPhone.


iPhone 8 and 8+ features front and back glass design
  • An iPhone formed from glass.Both models iPhone 8 and iPhone 8+ feature a glass back and front. 
  • A colour‑matched, aerospace‑grade aluminium band. 
  • Three new finishes.iPhone 8 comes in three new glass finishes: space grey, silver and gold.
  • Water and Dust Resistant
  • And an oleophobic coating lets you easily wipe off smudges and fingerprints.

Apple A11 Bionic: The fastest six-core mobile processor

iphone 8 and 8 plus A11 bionic processorsThere are two “performance” cores and four “high-efficiency cores” for a total of six.This chip falls under the category ‘heterogeneous computing processor’, which is effectively allows devices to run on processors that have cores of different specifications. This unlike a processor in your PC, where all the processor cores are exactly the same.
  • Speeding up image recognition including biometrics. Apple says it’s the “most powerful, and smartest chip ever in a smartphone”.
  • Compared to  A10 series, Apple claims 25% better performance from those all-important performance cores, while the four high-efficiency cores will collectively be 70% faster for background tasks. What’s more exciting is that the controller, which decides what cores get which tasks, now allows all six cores to work on the same task, allowing for 70% faster multi-threaded workloads.
  • Graphical processor GPU is said to be 30% faster than A10, while consuming half the power.
  • The A11 Bionic includes a faster image signal processor for better camera performance, better pixel processing and better noise reduction.


New 4.7‑inch and 5.5‑inch Retina HD displays.Retina Display is a term developed by Apple to refer to devices and monitors that have a resolution and pixel density so high – roughly 300 or more pixels per inch – that a person is unable to discern the individual pixels at a normal viewing distance.

  • True Tone technology automatically adjusts the white balance to match the light around you. For a better viewing experience in all kinds of environments. So images on the display look as natural as on a printed page, reducing eyestrain.
  • With a wide colour gamut and the best colour accuracy in the industry, everything on the screen looks more brilliant and vibrant.
  • Apple 3D Touch is a hardware-based feature Apple introduced in iPhone 6s and 6s Plus  that perceives the amount of force a user puts on the touch screen to activate different functions.
  • Wide Viewing Angles:Dual‑domain pixels give you a great view of the screen from almost any angle.Dual-domain pixel is a special arrangement of pixels in a display to obtain wide viewing angle.

Wireless Charging

iPhone 8 and 8+ are truly wireless device, free from charging cables and headphone cords. With a glass back and an embedded wireless charging system, iPhone 8 and iPhone+ is designed for a wireless future.
iphone 8 wireless chaging
Apple  devices on wireless charging pad
The intelligent new AirPower mat(coming in 2018) lets you charge your compatible iPhone, Apple Watch and AirPods anywhere on its surface.The AirPower mat uses a new kind of charging standard that supports multi-device charging.
A Wireless World:Charge with wireless charging stations and mats in hotels, cafes and airports around the world


iphone 8 plus dual camera
iPhone 8+ features  dual back camera
All‑New Sensor:iPhone 8 features a more advanced 12‑megapixel camera. With a larger, faster sensor. A new colour filter. Deeper pixels. And optical image stabilisation for photos and videos.

The intelligent, Apple‑designed image signal processor detects elements in the scene — like people, motion and lighting conditions — to optimise your photos even before you take them
  • iPhone 8 Plus Dual Cameras:iPhone 8 Plus has a wide‑angle camera with an ƒ/1.8 six‑element lens, optical image stabilisation and a larger, faster 12‑megapixel sensor. It also has a powerful ƒ/2.8 telephoto camera. Together these two cameras enable optical zoom and Portrait mode.
  • Quad-LED True Tone flash with Slow Sync
  • Backside illumination sensor
  • Body and face detection
  • Burst mode
  • 4K video recording at 24 fps

iOs 11

Apple iPhone 8 and iPhone 8 plus run on iOs 11.It makes iPhone better than before.Apple says 'iOS is the most advanced, intuitive and secure mobile operating system in the world.
iphone 8 ios11
iPhone 8 and iPhone 8 plus run on iOs 11
    • The new Files app brings all your files together. You can easily browse, search and organise all your files in one place. And there’s a dedicated place for your recent files.
    • iOS 11 makes it easier and more intuitive than ever to multitask. You can open a second app directly from the Dock and both apps remain active in Slide Over as well as Split View.
    • Augmented reality.:iOS is the world’s largest augmented reality platform. Games and apps now offer fantastically immersive and fluid experiences that go far beyond the screen. By taking advantage of the latest in AR technology, you can digitally redecorate your home, explore a city you’ve never visited or even try on a new tattoo. 
    • Siri:Through advanced machine learning and artificial intelligence, Siri can send a message, set a timer, be your personal DJ and so much more. 
    • AirPlay 2. With the new AirPlay 2, you can control your home audio system and the speakers throughout your house. You can play a song in the living room and your kitchen at the same time. Adjust the volume in any room. Or have your music start instantly on all your speakers — in sync with one another.
    • Do Not Disturb.When you’re driving, just drive:iPhone can now sense when you might be driving and help keep you from being distracted by calls, text messages and notifications. People trying to message you can automatically be notified that you’re driving.
    • QuickType keyboard for one hand typing
    • Automatic Setup:Just hold your new iPhone or iPad near an iOS device to sign in with your Apple ID automatically. Many of your personal settings, preferences and content will be quickly and securely imported.
    There is no doubt that iPhone is the most trustworthy smartphone brand,but Samsung pose a real threat to iPhone models since Samsung has geared up their innovation and competitiveness.iPhone 8 and 8+ are priced at $699 and $799 respectively.But Samsung has already rolled out handsets with above specs for lower price tag.Android is also fast evolving.So demand for iPhone 8 and 8+ is yet to see. As a brand iPhone is always a step ahead but people also love innovations and uniqueness.
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    Sunday, 1 January 2017

    New bug can crash your iPhone with a single text

    iOS bug Renders Your Messages App Useless, but There is a fix too

    iphone message app cash and its fix
    iPhone is known for it's privacy&security,but this new bug can crash your iPhone with a single vCard
    The only reason people choose iOS among any other mobile operating systems is its relative security and stability.iOS is generally considered to be secure,but a recently-discovered bug that disables the Messages app reveals that not even Apple’s mobile operating system is free from vulnerabilities.This iMessage bug is discovered by software developer vincedes3, is pretty simple but too malicious.It work on iOS 8 to iOS 10.2.1 b2 (latest version now).Apple iPhone users are worried and they are searching for 'how to block messages on iPhones' and 'how to delete messages on iPhone'

    What is bug that crashes your messages on iPhone?

    The exploit,involves a complex vCard, which is a transferable Address Book contact.Whereas typical vCards feature 200-300 lines of code, the developer’s vCard reportedly includes 14,281. As a result, when Messages tries to open the vCard, the app crashes.A bug in Apple's iOS won't allow the iMessage app to move past this huge file.

    How this iPhone Message crash works.

    When you click the vCard received, iOS want to read the text, the text in the file is very complicated for the system and cause a CPU average: the app freeze. You close the app, want to reopen but iOS want to reload the previous message but can’t because it’s the vcf file.
    This video from vincedes3 will explain it better.

    These crashes are not a one-time event, unfortunately — they happen every time you open Messages, since the app tries to open the most recent message. As such, restarting the phone or the app will not work, since the cycle will repeat itself.

    Want to try this iOS message crash?

    Try at your own risk!
    vincedes3 explains the process as follows.
    • Download the file here
    • Upload it to iCloud Drive, Dropbox etc.. (just if you want to keep it)
    • Share the file to send it via Message
    • Send it to your victim
    • Wait for the victim click on it, the Message application freeze and don’t work anymore.

    How to fix iPhone Message app crash?

    Vincedes3 also provides fix for this crash.
    Clicking on this link triggers a process that is supposed to fix the crash and return the iMessage app to its original working state.
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