rs-measure example gives half of the real distance

[phat64]

Required Info
Camera Model	SR300 & D415
Operating System & Version	Linux (Ubuntu 16.04)
Kernel Version (Linux Only)	4.13.0-37-generic
Platform	PC
SDK Version	2

Description

When I use the rs-measure example from the librealsense, I have a wrong measure of the distance between 2 points. When I want to measure a 20 cm ruler, the result is 10 cm. And when I want to measure 10 cm, the result is 5 cm. But the depth is ok

[dorodnic]

Hi @phat64
Yes, the output displayed by rs-measure seems to be not very accurate. We do offer a disclaimer with this demo not to use it for actual measurements, but rather only as a capability demonstration.
We will try looking more closely what is causing the discrepancy, since as you mentioned the depth data seems fine.
The overall method used in this demo is summarizing piecewise Euclidean distances between 3D points along Dijkstra shortest path. If anything I would image this estimate to overshoot the actual distance.

[RealSense-Customer-Engineering]

[Realsense Customer Engineering Team Comment]
@phat64
Have you tried the suggestion from necroen?
et
dec.set_option(RS2_OPTION_FILTER_MAGNITUDE, 2);
to
dec.set_option(RS2_OPTION_FILTER_MAGNITUDE, 1);
will be ok

[ev-mp]

Hello @phat64 ,
The latest v2.11.1 should address this issue. Please check and update

[RealSense-Customer-Engineering]

[Realsense Customer Engineering Team Comment]
@phat64
is the issue fixed after testing with the latest LibRS?