topic D435 FOV (color VS depth) in Items with no label

D435 FOV (color VS depth)

SJung11 — Fri, 23 Mar 2018 03:21:02 GMT

Hi, I'm suho

I ordered a RealSense D435 and am waiting for delivery.

I have a question.

I read a Spec of D415/D435

The color FOV of D415 and the depth FOV of D415 and the color Fov of D435 are the same.

but I would like to use the D435 wide FOV on the color camera, is it possible??

(*wide Fov is 65.5 x 91.2 x 100.6º)

and I would like to calibrate color frame and depth frame.

Q1. can i use the D435 wide FOV on the color camera?

Q2. can i calibrate color frame and depth frame (in wide FOV state)

Re: D435 FOV (color VS depth)

MartyG — Fri, 23 Mar 2018 07:43:19 GMT

The full specification details of the D415 and D435 cameras can be found in their data sheet document.

https://www.mouser.com/pdfdocs/Intel_D400_Series_Datasheet.pdf https://www.mouser.com/pdfdocs/Intel_D400_Series_Datasheet.pdf

Looking over the sheet, it seems that the wide mode is limited to the infrared sensor and stereo sensors, and that the RGB sensor does not have a wide field.

Calibration of the 400 Series cameras can be performed with a calibrator tool.

Re: D435 FOV (color VS depth)

PSnip — Fri, 23 Mar 2018 11:13:08 GMT

Hi Suho,

To add to what Marty already posted

(1) Regarding FOV

(a) Color FOV of D415, and Color FOV of D435 is identical: Diagonal 77.

(b) Depth FOV of D415 is Diagonal 70 [IR cameras have FOV 77, but while aligning images from 2 IR sensors for computing Depth some areas are probably cropped].

Above are the max FOV numbers. So on D435 you can get Depth FOV less than FOV but not higher.

Similarly for D435 RGB camera, max FOV is 77, you can't get beyond that.

(2) What kind of calibration are you looking for? Note that librealsense already has calibration data, and you should be able to use it via realsense APIs. You can obtain

(a) Intrinsic calibration matrices for each camera

(b) extrinsic calibration from one sensor frame to another sensor frame

This link has some good details regarding camera calibration

https://github.com/IntelRealSense/librealsense/wiki/Projection-in-RealSense-SDK-2.0 Projection in RealSense SDK 2.0 · IntelRealSense/librealsense Wiki · GitHub