3D Models: Waive your Smartphone and turn it into a Ruler!

There have been a lot of apps that allow the generation of 3D Models of objects. These models are captured through just your smartphone.  But when it comes to capturing the exact size of an object these apps may not be completely trustworthy.  But a group of researchers have put forth their effort to boost measurement accuracy.

Researchers have set foot into creating a new technology that uses the camera to measure space.  This new technology uses the camera and accelerometers in a moderate cellphone to measure the real objects in 3D
Models of space.  This fascinating technology was devised by Carnegie Mellon University. The system can indeed be used to build “3D Models of the world”. It does so by just waving your phone around an object or scene.

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3D Models Generation: How does it work?

Accelerometers that measure the inertia calculates the position of the smartphone in space. It roughly calculates and tells the smartphone’s software the position. The IMUs are mostly very noisy and rarely used to access a phone’s actual orientation with any degree or real accuracy. But when it is coupled with the camera the results are far more better. The motion sensor tells the smartphone when to automatically switch the display from landscape to portrait modes. This makes it easier for accurate measurements.

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3D Models: Experimentation

When the application was tested, it was first designed to track human faces. The approach was was able to accurately measure the distance between the pupil  to within half a millimetre. Whenever you try on virtual glasses next time on a website use the front-facing camera.  The app will be able to calculate whether the glasses fit you well or not.

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3D Models: Applications

• Technology allows 3D printers to act as perfect photocopiers for physical objects.
• Improves vision system if smartcars.

 Simon Lucey, Associate Reserach Professor CMU,  says

“We have been able to get accuracies with cheap sensors that we hadn’t imagined. With a face tracker program , we are able to measure the  distance between a person’s pupil  within half a millimetre Such measurements would be useful for applications such as virtual shopping for eyeglass frames. The trajectory we create with these cheap IMUs will drift over time, but the vision element we create is very accurate. So we can use the 3-D model to correct for the errors caused by the IMU, even as we use the IMU  to estimate the dimensions of the model”.

This tool allows for good computer vision. It also adds on to enable us to create a 3D models of almost everything with just your smartphone.  This is expected to be used in self-driving cars. This can bypass expensive and power hungry radars. Using this system the researchers created something called the Smart Fit. The Smart Fit finds the perfect suitable glass frames for your face.

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