How to make a 3D model with a drone FOR FREE

today I'm trading my hiking boots for high-tops I'm going to do some urban mapping one of the things that I love most about the location that I'm going to shoot today is the level of detail this whole building is made from hand-carved granite and so there's not a lot of straight edges to it it's primarily rough edges detailed chiseled faces in the side of the building one of the things I hate the most about this location is that there's a few tall trees and a couple of them hanging down pretty low which causes a lot of shadowing in the pictures which can cause holes in my 3d model but I think I've got a way around that way to fix it so we're gonna find out fortunately for me I have a great visual observer today he usually does a pretty good job okay that's not true he's pretty lazy [Music] for planning the flight I'm going to use my favorite Android application drone harmony this app just came out of beta and you can test it for free for 30-days it not only does mapping but it also has features for conducting inspections and it allows you to create some really sweet cinematic video shots and no I'm not getting paid to say that I'll start by creating my flight path for my nadir images normally I am strongly against using a crosshatch grid pattern because it takes more pictures which take more time to process however this is a complex model and it needs a complex solution so I guess that means I'm using the crosshatch grid pattern once I create my flight area I then select my takeoff and landing point next I'll slow tattooed and course direction one thing about drone harmony it's very intuitive and it creates the most efficient flight path to capture the least number of photos but for this model I don't really want efficient I want a better angle so I'll create a flight path that does not line up parallel to the buildings then I'll create a second flight path that's going in the opposite direction on both flights I'll use the same altitude and angle of the camera which I'm going to set at 45 degrees that way it'll capture the sides of buildings I will make my overlap 75 on the side and then 75 on the front mainly because well it's my model and I can make it the way I want now that my flight plan is done I'll set up the camera for these first two flights I'm going to set it to shutter priority and then put the shutter at one thousandth of a second then I'm going to set my ISO and aperture to automatic and down here at the bottom you can see the letters evey that's the exposure level since it's bright and sunny I set that to slightly underexposed that way my images don't get blown out with light then I put the white balance on sunny and find a good color filter that I like in this case I'm going to use film H I make a few adjustments that I normally don't need to make in drone harmony but since I altered the flight path I have to make these adjustments now I'm ready to launch okay now I finished my first two missions and all I have left is my point of interest mission I'm going to use the DJI Go app but that's only because I have not tried it in drone harmony yet if you notice the red bar at the top says update required well I strongly suggest that you never update your firmware until you have time to test it out first I've actually seen when an update will cause the drone to malfunction and that can be dangerous going to set the shutter speed to eight hundredths of a second with the ISO and aperture set to auto just like before I set the white balance to sunny and I'll set the color filter to blue then I'll make a few other small adjustments and then lunch all I'm going to do is fly around the top section of the building being sure not to capture any images with the sky in view then I'll lower the altitude and circle the building again I may even drop down one more level before I'm done just to be sure that I've covered the building completely I want to capture as much detail as possible and to capture that shaded area under those low-hanging trees that I was talking about I'm going to use a regular camera or might even use the drone to capture the terrestrial pictures and that just means that I'm taking pictures from the ground alright now that I have all the pictures I need let's start processing I load my 700 pictures into pix 4d and choose the 3d model template I then draw a processing box around my project so that I have nice straight edges in my final 3d model and then how process step 1 now I'm ready to start the project after step one is complete it's time to make some manual type oints so that I can merge the different layers together there's a couple of reasons that this happens one is color and contrast because the nadir pictures are taken while the lighting is a little different than it is for the obliques it causes the software to place the point cloud in different locations to fix this issue picks 4d recommends that you create two projects one with the nadir images and one with the oblique images but I'm a little bit lazy so I'm gonna create one project and then merge it together after that so what I do is use tie points on the images from as many different angles as possible when adding tie points be sure to only add them to the spots that have a clear view to that point of course I'm probably adding more points than I need but it's better to have more than not enough after creating a minimum of three manual type oints I can react my's I'll probably create four or five before I'm done and now I'll go to the top menu and click on process then go down to re optimize alright that'll take a little bit but when it's done everything should be in one single layer now that it's finished let's take a look at it it looks okay but the point cloud needs to be cleaned up just a little bit and then I can regenerate the mesh then it should be done the way I normally do it is tick the box for triangle mesh and then I'll find the areas that don't look very good and I'll clean those areas up sometimes I can just click on the editing tool up here and highlight the points that need to be deleted and that's good enough but sometimes there is something in the way a building or some other object that I don't want to delete and so I have to then classify the points behind that object let me show you an example alright so this tree doesn't look as good as I think it should so I'll just cut a little bit off of it but to clean the tree up when I highlight the tree it also highlights the points on the ground since I don't want to delete the ground that's not a good option so what I normally do for instance I'll take this building and I will classify the whole building by highlighting all of the building then I'll come up here to the top drop down menu I'll put it on buildings and then hit a sign of course you have to make sure that the box is not ticked that says buildings otherwise it won't disappear let me get this other small piece out of the way real quick all right now that that's out of the way that allows me to then select some of the points from this tree then I can go up to the top to the drop-down menu and select disable and then assign those points to the disabled category now this is the easiest way that I found to delete the points or to hide the points that you don't want once you've cleaned up all of the points that you want you make sure that the only boxes that are ticked are the ones that you want to use so normally I put everything I don't want in the disabled category and everything else can stay after that I'll go back up here to the top to process then scroll down to regenerate 3d mesh all right once the mesh has been generated and it looks as good as you want it to then you're either done or you can create a fly through now the nice thing about this is that you can create your fly through and then you even have the option to output that video file so that you can use it on your website whatever you want to do so this is a good way to practice your skills on 3d modeling and not have to pay a lot of money and if you do want to use the file for the 3d model and you can just pay the 50 bucks to pics for D it's still worth it all right I hope this was helpful please be sure to like subscribe and share and we'll see you next time that's something [Music]

Channel: GM6 Drone Mapping

Views: 26,250

Keywords: GM6 Solutions, drones, drone, drone map, 3D Mapping, 3D Mesh, Agisoft, Drone Mapping, Dronedeploy, GIS, Pix4D, UAS, UAV, www.guardmy6.com, guardmy6, drone companies, drone images, US Map, photogrammetry software, 3D Modeling

Id: WPrxDmPvDiM

Length: 12min 1sec (721 seconds)

Published: Sat Jul 28 2018