Breaking News
Oldest First | Newest First | Threaded View
User Rank
3D Depth Map
chanj0   6/26/2014 8:50:32 PM
How the depth map is being sensed? Laser or stereo vision.

Going to 3D seemingly is a logical move, can you think of some use of the 3D information?

User Rank
3D is future but...
wilber_xbox   6/27/2014 12:24:36 AM
Going by the product sucess in 3D, people have still to warm up to the technology. I think the major hurdle is to make 3D more interactive with little gadget attached to the human. If we can achieve that then it will be a revolution in how we consume information now.

User Rank
Re: 3D is future but...
Sheetal.Pandey   6/27/2014 1:04:48 AM
Tablet is a device where there is more space for innovation and its also very handy for the user. You dont have to carry along a bulky device like notebook or laptop and you dont have to limit yourself with smaller screen as of the smartphone. But tablet needs more innovation/improvement in camera side can phone communication. And of course ease to hold. Battery power is another one thing that needs more innovation. Memory or storage capacity is also something that worries me.

Its good that Google is keeping it open for the developers. Its futuritic.

User Rank
Re: 3D Depth Map
Sheepdoll   6/27/2014 3:04:34 AM
chanj0 - How the depth map is being sensed? Laser or stereo vision.

By chance I was looking at some old papers on 3D collected in the book 3D Model Recognition from Stereoscopic cues.  Mayhew, Frisby et all.

3D can also be recovered by changing the depth of field in the image.  This effectively changes the focus of the image.  Mostly this is done for medical imaging focusing through the slide and creating an image stack.

3D Photogrammetry has been a passion of mine for some time.  I use it to capture images of pipe organs and other items (museum objects like the Jaquet droz dolls and the antikeythera mechanism) then build virtual models of the structure.

3D has faded in and out on a decade or so cycle for the last 230 or so years.  Problem is that only about 80 percent of the population can see it efficiently.   I have 3D photos on my iPhone and website, usually carry the glasses with me.  Have been doing this for close to 40 years. 

There are ways of generating 3D without aids, like lenticular screens.  Such are patent nightmares, as too many people have attempted to patent and control the obvious. Which in turn makes it too expensive.




User Rank
Re: 3D Depth Map
phongjohn   6/27/2014 4:05:56 AM
chanj0: about your question [How the depth map is being sensed?], I think Google Tango tablet uses OmniVision 3D Sensor OV4682 to record RGB and IR information (and OV7251 for motion tracking).  

The OV4682 handles depth map via infrared (IR).  Somebody please check to see if I am on the right track.  I think Google Tango projects a grid of IR beams which shows on the objects (e.g., a person walking on a staircase) as patterns of dots.  The OV4682 then captures these patterns and processes for depth, where distribution of dots on near objects is less dense than the distribution of dots on far objects.  This approach (dots pattern) is known as structured-light.

Another depth-sensor approach is time-of-flight (ToF) which measures the time for light to strike the object and return.  ToF is usually more effective than structured-light since structured-light may not be able to illuminate some objects and structured-light often requires callibration.   If I were to make a wild guess, Google Tango may start with strucrured-light to get the ball rolling, then switch to ToF.

User Rank
Tango vs. Kinect
LarryM99   6/27/2014 12:02:01 PM
When I was reading this I couldn't help but compare it to the Kinect sensor package. When that came out as a consumer device it was hacked into service as a general sensor device in about no time at all, which tells me that there is an interest in this. How does Tango compare as a sensor package? It looks like it is coming out as a much more accessible set of sensors if nothing else, but I don't have a good feel for the comparable quality of those sensors.

Larry M.

User Rank
Re: 3D Depth Map
junko.yoshida   6/28/2014 6:04:14 AM
@chanj, as to how it's done, you can refer to this embedded vision's write-up: Omnivision's OV4682 captures both video and IR information. At the core of Google's Project Tango sits Movidius Vision processing chip.

User Rank
KB3001   6/28/2014 11:09:37 AM
Good development but it's still far from widespread use because of algorithmic, hardware and software constraints. Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.

Brought to you by:

Like Us on Facebook
Special Video Section
Power can be a gating factor in success or failure of ...
Get to market faster and connect your next product to the ...
See how microQSFP is setting a new standard for tomorrow’s ...
The LTC3649 step-down regulator combines key features of a ...
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
Wireless Power enables applications where it is difficult ...
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
The LT8602 has two high voltage buck regulators with an ...
Silego Technology’s highly versatile Mixed-signal GreenPAK ...
The quality and reliability of Mill-Max's two-piece ...
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...