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RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

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Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#31
post #20

Earlier quoted context omitted.

A digital (and therefore shareable) floorplan is plainly more useful in a variety of ways than one that exists only on paper

A smartphone camera very quickly turns a non-digital floor plan into a digital one.

It could send a photograph of a floorplan, but it wouldn't be editable unless there's some interpolation of the image you photograph. When your original floorplan begins in digital form, it's more-flexible for editing.

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#32
post #29
post #25

Earlier quoted context omitted.

My HOWTO: 1. Obtain laser tape, pencil, and paper. 2. Sketch out floor plan with pencil on paper in rough scale. 3. Take laser tape and take needed measurements. Annotate measurements on your rough scale paper drawing. 4. Go back to desk and open OmniGraffle (or Visio or whatever). 5. Draw up a scale floorplan, exportable into any needed, industry standard formats. 6. There is no step 6. Some variation of this HOWTO…

I bet someone once said the same thing about the laser tape replacing traditional tape measures.

Until they tried to hold a tape measure straight to measure a 30-something foot room...

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#33
post #23

Earlier quoted context omitted.

I was actually beginning work on a similar project. Essentially, it's using a combination of the accelerometer and the gyro to get the phone's position in 3D space. That is, when the accelerometer capture lateral velocity, it knows it's moving in a certain direction at a certain speed (until, of course, it receives an opposite velocity, at which point it stops).

Did you ever manage to get it to be accurate, though? I tried something similar but the accelerometer and gyro were nowhere near accurate enough.

Supposedly, there's a rule of thumb that says that dead reckoning by integrating readings with a MEMS sensor is about as good as walking around with your eyes closed. I didn't even get mine working that well when I tried, but I'm sure it's possible if you get the pre-integration noise filtering right.

Lately I've seen a lot of app notes and open-source code written by/for amateur drone guidance developers, which I suspect would have helped me a lot.

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#34
post #23

Earlier quoted context omitted.

I was actually beginning work on a similar project. Essentially, it's using a combination of the accelerometer and the gyro to get the phone's position in 3D space. That is, when the accelerometer capture lateral velocity, it knows it's moving in a certain direction at a certain speed (until, of course, it receives an opposite velocity, at which point it stops).

Did you ever manage to get it to be accurate, though? I tried something similar but the accelerometer and gyro were nowhere near accurate enough.

It's unlikely to be standard inertial navigation, mems sensors drift with dead reckoning integration pretty quickly, even applying more sophisticated kalman filtering may not improve things indoors without GPS (or sufficient travel for GPS even if you could receive it consistently)... But, if you were to add "room-like" assumptions it might improve things pretty well, eg. when integrating a rotation, fit it to a 90 degree corner, similar with traversal, fit it to travel along a wall. With those basic assumptions, I'm guessing you can correct a lot of the raw integration drift. If this is true, my guess is it would start break down in unconventional rooms - octagonal rooms, non parallel walls, etc...

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#36
post #31

Earlier quoted context omitted.

A smartphone camera very quickly turns a non-digital floor plan into a digital one.

It could send a photograph of a floorplan, but it wouldn't be editable unless there's some interpolation of the image you photograph. When your original floorplan begins in digital form, it's more-flexible for editing.

[deleted]

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#37
post #29
post #25

Earlier quoted context omitted.

My HOWTO: 1. Obtain laser tape, pencil, and paper. 2. Sketch out floor plan with pencil on paper in rough scale. 3. Take laser tape and take needed measurements. Annotate measurements on your rough scale paper drawing. 4. Go back to desk and open OmniGraffle (or Visio or whatever). 5. Draw up a scale floorplan, exportable into any needed, industry standard formats. 6. There is no step 6. Some variation of this HOWTO…

I bet someone once said the same thing about the laser tape replacing traditional tape measures.

This argument depends on specifics, not the overall form. Just because another argument with a similar form was made and it was wrong doesn't mean anything about this one.

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#38
post #23

Earlier quoted context omitted.

Did you ever manage to get it to be accurate, though? I tried something similar but the accelerometer and gyro were nowhere near accurate enough.

It's unlikely to be standard inertial navigation, mems sensors drift with dead reckoning integration pretty quickly, even applying more sophisticated kalman filtering may not improve things indoors without GPS (or sufficient travel for GPS even if you could receive it consistently)... But, if you were to add "room-like" assumptions it might improve things pretty well, eg. when integrating a rotation, fit it to a 90 d…

Bingo. Here's an example from a room with a centered bay window: http://images.younghouselove.com.s3.amazonaws.com/2014/02/Ap... So you have to go back with a measuring tape and amend all the measurements anyway, because it's so inaccurate.

Full article reviewing MagicPlan and RoomScan: http://www.younghouselove.com/2014/03/apps-and-zerts/

Re: RoomScan: Get a Floor Plan in Minutes Just By Walking Around the Room

#40
post #7

Could anyone possibly shed some light on what is used for measurement? gyro?

I was actually beginning work on a similar project. Essentially, it's using a combination of the accelerometer and the gyro to get the phone's position in 3D space. That is, when the accelerometer capture lateral velocity, it knows it's moving in a certain direction at a certain speed (until, of course, it receives an opposite velocity, at which point it stops).

How does it measure the length of the wall by holding it in just one spot in the middle?
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