Intel RealSense D435i: a small update and a small historical excursion
The updated model of the camera RealSense 435, which received the index i, saw the light. Its distinctive feature is the built-in inertial sensor IMU (Inertial Measurement Unit). Doesn't the Intel RealSense name tell you anything? Then this post is for you. The development of this technology is described in detail here, in the company's blog, that you can tell its story without going beyond Habra. So we, perhaps, will act, because lately RealSense is not to say that it is heard - even though it is unfair.
Creative Camera with Intel Perceptual Computing SDK. 2013
3D imaging technologies have been developed at Intel since the early 2000s. The name RealSense appeared in 2014 , replacing the previously used Perceptual Computing ; Then came Intel RealSense SDKand a prototype camera. The principle of operation of 3D cameras consists in the simultaneous formation of two types of images: a normal RGB frame and a depth map obtained using infrared emitters and sensors. The image enriched with depth data can be used both for manipulating and analyzing objects (for example, background segmentation or moving the focus point), as well as a natural interface for controlling computer systems using facial expressions, hand and finger movements, gestures.
RGB-photo and depth map for it.
In the next 2 years, Intel actively promoted RealSense on all fronts. Regular developer contests were held, numerous training and reference materials were published.. In 2015, two serial RealSense cameras were released: the front F200 and the rear R200 . In this case, I even had a personal examination: on the 2016 New Year holidays, I had the opportunity to test both cameras at home . There were plans to introduce RealSense in laptops, smartphones and other computers , but later everything was limited to PC cameras.
Camera Intel RealSense SR300. 2016 The
time passed, the software was improved, new cameras were released, first of the second , then the third generation. Every time new improvements were made.: increased accuracy of determining the depth, ease of use, there were new recognition features. Intel continued to interact with the developers and receive feedback from them. In the blog, we actively published Russian-language translations of articles on the RealSense SDK - this was one of the few sources of information about RealSense in Russian. Which, in fact, is true to this day.
Intel RealSense SDK 1.0 allowed you to track up to 76 face key points, in the following versions the number of points increased
Currently relevant family of cameras Intel RealSense D400, released earlier this year. The family consists of two cameras: D415 and D435. D415 gives a clearer picture, but has a lower speed and a more distant minimum distance. The D435 is more suitable for AR / VR applications, as its global shutter works better with fast moving objects. More detailed characteristics of the cameras are given in the table.
|Application||Room / Outdoor|
|Depth determination||Dual IR beam|
|Pixel size||1.4 x 1.4 µm||3 x 3 microns|
|Depth field size||63.4 ° x 40.4 °||85.2 ° x 58 °|
|Depth field resolution||1280 x 720|
|RGB stream options||1080p @ 30 FPS|
|Depth range||0.16 - 10 m||0.11 - 10 m|
|Camera size (W x D x H)||99 x 20 x 23 mm||90 x 25 x 25 mm|
Intel RealSense D435i is now in pre-order , shipments will begin on December 3, the current price is $ 199.