iPhone LiDAR + DJI Gimbal = More Accuracy
ฝัง
- เผยแพร่เมื่อ 15 มิ.ย. 2024
- Can a gimbal really improve mapping accuracy on the iPhone 13 Pro's LiDAR sensor? I compared a scan around my house using just my hand with all the shakiness and then the same scan but using a DJI Osmo Gimbal. The level of accuracy you can achieve with the gimbal is outstanding!
Check out SiteScape in the App Store - apps.apple.com/us/app/id15247...
Join me on Social Media:
🖥️ Website: www.tamimi.biz
👤 Facebook: / tamimibiz
👕 Survey Shirts - www.SurveyShirts.com
👥 Private Facebook Group: / iamasurveyor
📸 Instagram: / ramitamimi
👔 LinkedIn: / ramitamimi
✉️ Email: rami@tamimi.biz
Chapters:
0:00 Intro
2:01 Project Overview
3:06 Hand Scan
5:21 Gimbal Scan
7:01 Exporting Data from SiteScape
8:24 Analyzing Data on Civil 3D
About Professor Rami Tamimi:
Rami Tamimi is an American doctorate student at The Ohio State University working towards his Doctor of Philosophy in Geodetic Engineering. With over 8 years of experience in the Land Development Industry, his experience revolves around traditional field surveying, civil design work using AutoCAD Civil 3D, and geospatial technology including LiDAR, SONOR, and Photogrammetric data acquisition and processing with the use of Unmanned Aircraft Systems or Drones. He is also a University Professor and creates instructional video content on TH-cam.
#iPhoneLiDAR #Surveying #iPhoneMapping - วิทยาศาสตร์และเทคโนโลยี
It would be interesting to compare the scans to the Leica BLK2GO.
My thoughts exactly. Also... could we add a gimbal to the BLK2GO to make it more accurate?
Thank you for taking the time to do these videos. I appreciate all the great information!
Great presentation! Stunning differences ~ love the scientific approach!
Wow - that is way cool. I never even thought you could do stuff like this with an iPhone. I love it.
Love the content; it would be interesting to see the effect of the gimbal on a 200’ baseline as in your iPhone 12 video or maybe in a closed and adjusted traverse. Was thinking you could pound in hubs with a tack or ink marker position that could be pinpointed in the scan.
Hi Rami... All your videos are very informative. All the best
Ah Rami! Thank you so much for doing the test with an osman! I’ve been dying to try this myself, and was the first way I thought to try actually accurately scan with the phone, but I did not know anyone who would lend me their phone or their osman 😂 thank you so much for doing this test 😃
Thanks very much for the top , I was struggling with issue when I’m trying to scan space for my work
This is what i was looking for, a comparisson using a hand scan and a gimble scan...great work!!!!
Rami I was pleasantly surprised how accurate the iPhone LiDAR was when you compared it to the Total Station. But to see that much increase in accuracy by using a gimble from feet to mere inches?! Far more accurate than a home owner doing a project would ever need.
Great test and not surprised by your result. At the beginning of the test, you mentioned the accelerometer and gyroscope for tracking motion of the iPhone. However, you missed the fact that Apple uses visual-inertial odometry which means it uses VISUAL information as well to track the movement through the scene. Each time your phone shakes from each step, you are introducing blurry images that the system can't use as well for tracking the scenes so it relies more on the inertial data - which you established was not the best data. I would have liked to have seen a sample size of more than 1 test with each mode to get a feel for how much a gimbal effects the results. Was this a worst case scenario? Best case? Does it drift more or less?
Last note, this is why EveryPoint's video+LiDAR fusion goes and extra step to implement loop closure to correct for drift accumulated over time. Using a gimbal vs just your hand will have no affect on the overall accuracy using fusion.
Great video! Looking forward to seeing more!
legend in the making, thank you
Hey Rami eagerly waiting for the video showcasing the difference between LiDAR based point cloud data and Photogrammetry based point cloud data.
I'm not into surveying but these videos are engaging and very well edited. Keep em coming!
thanks for the very scientific explanation :)
Architecture and Urbanism Student in here, thank you so much for the video, I have been looking for this video so much!!
Hi Rami. I'm a surveying undergraduate student. Currently I am writing a thesis on the application of iPad's lidar sensor for this purpose. I've been thinking about the topic since mid last year, and your first video on the topic had really gave me confidence that it's a viable thing. Thank you for doing these videos!
Hello, actually it is. I am currently testing to see the degree of confidence. I will apply it to road works.
@Arquidron Hi, I hope you are doing well!! Can you tell me how your validations did work?
Love your videos and really appreciate all the work you put into this. It would be even more interesting if the metric system wouldn't be completely ignored 😉
Inaccuracy is 4 gimmy bear with gimball and 4 subway sandwich without.
ótima comparação, acho que quanto mais estabilizado os aparelhos melhor o resultado... isso acontece na estação total, quando um caminhão passa, desistabilizando o aparelho.... Grato, estou te acompanhando
Brilliant!
Very interesting to see how useful a gimbal is for this
Makes logically a lot of sense
Wonder if you mounted it to your drone and did the survey. Great info and vids!
Thanks for the video!
Would much appreciate metric in addition to imperial units in future videos. On screen text would be enough.
Thanks for the amazing video. I have iPhone Pro 13 and the DJI Gimbal. Can i use it to scan the exterior of my house to import as a 3d model in Sketchup?
Cool video. The accelerometers cannot be designed to mitigate the drift. They only measure acceleration. Integrate the accel to get velocity and there's an unknown constant, intergrate the velocity to get position and there's another unknown constant. Same reason drones drift from position without visual feedbacks. It tries to guess the constants of the intregals, but it's not easy or directly measured. Less accelerations in any of the 3 axes makes less calcs and less drift.
Thanks for this video. I am an architect who uses 3D Scans on a regular basis. I arleady have an iphone but the scan quality was never very satisfiyng. I thought multiple times about getting a Matterport or Leica, but they are very expensive. A 150$ Gimbal on the other hand seems like a good investment if the scan quality is really that good! thanks
Just purchased a DJI OM 5 and have been fiddling with the features. One feature that stood out was the automatic pano function. Using this function on a tripod with a scanning software could greatly increase accuracy.
Seems this feature is driven by their app. Unless I’m missing something, this can’t be used while another scanning app is active.
@@ultdkn Yes it is, but imagine the accuracy by using a stand alone device (like the $40k plus LiDAR scanners) with only an iPhone and a OM 5 or similar. Would definitely shake the industry. I feel an individual more adept than myself could solve such an issue.
excelent
Make a video about 14pro using gimbal. After watching your videos I'm looking to buy an iPhone, for my projects. Thank you ❣️
How large are the scan files? I'm thinking of picking up an iphone 12 pro, will the storage size be relevant? How much of your storage space was needed for this house scan?
Super interesting, I'm a PhD student thinking about using these types of scans to measure habitat for turkey nests. Seeing this is giving me more confidence these data could be useful in those scenarios.
can you teach how to merge cloud points from iphones lidar scans inside a house with a phantom 4 pro rtk or ppk cloud points from outside the house and tell us the acuracy of final result?
the goal is make a 3d model inside and outside of the house in same project
Nice learning. What is the max distance can iphone scan
This is pretty amazing. Thanks for doing this. With regards to the iPhone Lidar sensor. Is it only 1 return value? Can it penetrate low vegitation?
Sounds like you’re looking for multispectral imaging, instead of LiDAR. Please let me know where you find one 😎
@@_istudywater no, modern LiDAR sensors track multiple returns per pulse in order to get through canopy better.
@@ba-ld3ti Multispectral sensors are used for for remote sensing applications related to evapotranspiration, tree health, canopy density, etc. This is not LiDAR, but a separate sensor.
Can you use the gimbal to "auto level" a small laser distance meter (like the Leica X4, or any of them really) vs a phone, so that you are always projecting a level dot to the target, quickly and easily to better than 0.2 deg)? This would be a big help even on a tripod, if it is being moved from place to place.
This looks like a nice tool, however, I'm using an ipad pro to do my scan and they don't seems to offer a version of the gimbal for ipad!
Which software are u using? Interesting
Very impressive. One thing you did not control was your distance away from the house as you walked. Looks like there's a palm tree or something near the front door. Maybe set your distance beyond the tree distance.
Next I want to see data taken from a drone flying at a constant altitude of 5 feet AGL around the house with a gimbal on the camera.
thats great, 0.2 feet using gimbal ... maybe less considering the fence's width?
Why did you choose Site scape and not another ap?
If you use dji vidoc would you still need to use the gimble stabilizer?
does the LIDAR sensor work whitout GPS???
i mean, in a tunnel or a mine and then do the georeference???
would a gimbal work for scanning bodyparts?
I would like to see this done with the ViDoc RTK…
Can ends of a point cloud close on a point, adjusting the data?
Great idea and really interesting video. I noticed that you were only scanning things facing straight ahead. If you were going to use this to scan all around an object, does the Osmo let you tilt the camera to face downwards, etc or does it only allow for shots that face more or less forward?
Красавчик, iphone может)
the lidar sensor, scania at night, without light?
can you show easy way to convert pointcloud into mesh?
Did do use S10 5g Samsung tof and what the distance range
Does spending more time scanning increase the quality and accuracy of the scan? For example, if I move slower than the guy in the video, would I be able to achieve a more detailed scan?
Is site scape better than polycam?
What is required minimum distance from the object with lidar
can we use Iphone 12 to collect the point cloud, instead of Iphone 13 Pro?
the lidaar able up to 40m scanning?
Is there another format besides AutoCAD civil 3-D to bring in the file to scale him another program. Are use VectorWorks
Cyclone works as well
bro sa iphone lidar lang ba meron yan? wala ba sa ibang smart phone bro? salamat sa sagot. by the way i love watching your videos. thumb up!
What is the name of the iPhone app you used to do the lidar scan?
SiteScape
not sure if iphone 14 pro still need the dji gimbal or not
Wait a second, doesn’t the plank thickness of the fence make the inaccuracy lower? [just a random thought]
Does Osmo Mobile 3 support iphone 14 pro? Thanks
Nice video, thanks, however I would have named the file Hand Job
Do survey through drone attaching ur phone
how to i import PLY point cloud in cinema 4D
Big mistake at the start of the video, the accelerometer does not give you the speed of your device. It measures acceleration, the change in velocity. The gyroscope measures the rotation speed, and the magnetometer somewhat measures rotation but it needs to be calibrated (you do this by rotating your phone in a figure 8) since the Earth's magnetic field is subject to local factors. To get velocity you need to integrate the accelerometer data which over time becomes less and less accurate from the true velocity of the device due to lack of precision, discrete samples, and noise. You can also integrate (double integration!) the velocity to get displacement (relative position) but the errors get even worse. Augmented Reality (AR) engines such as AR Kit (iOS) and AR Core (Android) are responsible for the real-time 3D position tracking and object rendering you see on your screen. On top of double integrating the accelerometer data (and integrating the gyroscope to set direction and using the magnetometer for additional corrections) AR engines process camera and Lidar data in real time to get an even better idea of where the device is. Once you have the position and rotation you can do stuff such as project lidar points and build a point cloud etc.
If you're still reading, I forgot to mention that there is a difference between the base accelerometer data and linear acceleration. The base accelerometer data includes gravitational acceleration (~9.806 m/s on average across the earth, ~9.802 around my house, the NGS has a gravity calculator tool if you are curious) which is removed to get linear acceleration.
If you moved that fast and casually with the survey equipment, which would be more accurate?
By the same token, if you take the time and care with the iPhone that you do with the survey equipment, what wouks the accuracy be?
Does not seem to be apples to apples comparison.
what about 14 pro?
I’m not an engineer, so pardon my ignorance, but is there a way to PPK the data sets using the phones GPS?
You need to find a way to access the raw logging data of the iPhones GPS positions. As far as I know, I have not seen any developers successfully do this.
@@RamiTamimi thank you for your answer! I wasn’t sure. Best!
is this app more accurate than 3d scanner?
Depends on object size. IPhone lidar is more accurate than engineering 3D scanner for big objects like houses, but it is less accurate (lack of details and accuracy) than engineering 3D scanner for objects smallest than car size.
I think the question was about the IOS app. I currently have 3DScanner App and Polycam. what are your thought on SiteScape vs Polycam?
I have come to same conclusion and have a Benro
Funny how they talk about accuracy and measure all in legs and football fields
accelerometer doesn't measure speed
it measures acceleration
Is this paid promotion?
no need gimbal when you are recording 4k video 60 pbs
Accelerometers don't measure speed, they measure acceleration, as is hinted in the same Accele-rometer. The accelerometer is used for many things but primarily for knowing how you move your phone. This can be things like when you pick your phone up, the screen turns on before you even touch a button etc.
Hey, Rami Some time ago I have asked a question to you but you didn't answer??? You are not responsible for viewers just uploading a video is not good just I think haa... My question was can we use Lidar to scan a boulder and calculate the exact volume of that boulder???? If it is how it is please make a video for it. Thank you in advance...
My apologies, I get hundreds of comments on TH-cam and across my social media so I don’t have the ability to respond to everyone. In regards to your questions, yes, you are able to do volumetric measurements on boulders or stock piles and calculate the volume of material or space that the object has.
Dear @@RamiTamimi can you make video about it. Please! Please! Please! And thank you so much for the reply...
@DevRealm no no no!! man you are wrong TH-cam is not the boradcast like as old TV show, its narrowcast we can and necessary to interact with audience or viewer for well growth. Keep on mind...
@@OnlineToBrain Almost every scanning software has a volume/stock pile analysis feature