Category: Photogrammetry

3D, Camera Calibration, OpenDroneMap, Optics, Photogrammetry

Self Calibration of Cameras from Drone Flights (part 2)

(Modified excerpt from the OpenDroneMap docs) In a previous post on camera calibration, we discussed the possibility of setting up calibration flights that have the following characteristics: non-parallel (converging) flightlines of 20° with a 5° forward facing camera (assuming 0° is nadir). With OpenDroneMap’s –camera parameter, we can thus import camera models from a calibration flight and use that in a more efficiently flown “traditional” … Continue reading Self Calibration of Cameras from Drone Flights (part 2)

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3D, OpenDroneMap, Photogrammetry

Self Calibration of Cameras from Drone Flights

(Modified excerpt from the OpenDroneMap docs) Calibrating the Camera Camera calibration is a special challenge with commodity cameras. Temperature changes, vibrations, focus, and other factors can affect the derived parameters with substantial effects on resulting data. Automatic or self calibration is possible and desirable with drone flights, but depending on the flight pattern, automatic calibration may not remove all distortion from the resulting products. James … Continue reading Self Calibration of Cameras from Drone Flights

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3D, Drone, Kerala, OpenDroneMap, Photogrammetry, UAS

Kole Wetland Canal Mapping with ClusterODM

My friends and collegues at International Center for Free and Open Source Software in Kerala, India have done a pretty interesting and massive mapping initiative over Thrissur Kole Wetlands. The wetlands are a massive 30,000+ acre area that are both important to wildlife and provide rice production. Suman Rajan, Asish Abraham, and Deepthi Patric (left to right in image below) mapped 9000 acres of it. … Continue reading Kole Wetland Canal Mapping with ClusterODM

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3D, Drone, Other, PDAL, Photogrammetry, UAS

Dar visit, drone fun

While I was in East Africa, I made a quick side trip to Dar to visit with some compatriots also interested in drones for good — specifically Frederick Mbuya of UhuruNet, UhuruFly, UhuruLabs, and World Bank Tanzania (etc.) , as well as Ivan Gayton, Humanitarian OpenStreetMap Team Tanzania, Missing Maps, formerly MSF UK (etc).   We chatted about tech, development, drones for good, and played … Continue reading Dar visit, drone fun

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3D, Drone, Other, PDAL, Photogrammetry, UAS

Finding peace, finding ground: Drone flights for hydrologic modeling

Another problem is the difficulty of turning photogrammetrically derived point clouds into Digital Terrain Models. There is proprietary software that does this well (e.g. LasTools and others), but we sought a free and open source alternative and approach. Let’s visualize the problem. Continue reading Finding peace, finding ground: Drone flights for hydrologic modeling

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3D, Image Processing, OpenDroneMap, OpenDroneMap, Optics, Other, Photogrammetry

Viewing Sparse Point Clouds from OpenDroneMap — GeoKota

This is a post about OpenDroneMap, an opensource project I am a maintainer for. ODM is a toolchain for post-processing drone imagery to create 3D and mapping products. It’s currently in beta and under pretty heavy development. If you’re interested in contributing to the project head over here. The Problem So for most of the […] via Viewing Sparse Point Clouds from OpenDroneMap — GeoKota Continue reading Viewing Sparse Point Clouds from OpenDroneMap — GeoKota

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3D, Drone, OpenDroneMap, OpenDroneMap, Photogrammetry, PMVS, UAS

OpenDroneMap — Paris Code Sprint

I failed to make it to the Paris Code Sprint. It just wasn’t in the cards. But, my colleague Dakota and I sprinted anyway, with some help and feedback from the OpenDroneMap community. So, what did we do? Dakota did most of the work. He hacked away at the cmake branch of ODM, a branch set up by Edgar Riba to substantially improve the installation … Continue reading OpenDroneMap — Paris Code Sprint

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3D, Bundler, Camera Calibration, FOSS4G, Image Processing, OpenDroneMap, OpenDroneMap, Optics, Photogrammetry, PMVS

MSF Canada Drone Day follow-up

Dirk’s MSF Canada Drone Day is officially the first blog post I have “re-blogged”. Please read: https://smathermather.wordpress.com/2015/07/13/msf-canada-drone-day/ or better yet here: http://dirkgorissen.com/2015/07/14/msf-canada-drone-day/ I had the pleasure of co-presenting with Dirk and Ivan, and the rest is well covered in Dirk’s post. It came together as an excellent day and I think you would be hard pressed to have had a better introduction to drones. The … Continue reading MSF Canada Drone Day follow-up

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3D, Bundler, Camera Calibration, FOSS4G, Image Processing, OpenDroneMap, Optics, Photogrammetry, PMVS

OpenAerialMap, OpenImageryNetwork, MapKnitter, OpenTerrain, and OpenDroneMap (cont. 1)

Citing my previous post, let’s move on to more specifics on my thoughts regarding the integration of OpenAerialMap, OpenDroneMap, and MapKnitter as projects. OpenDroneMap ❤ OpenAerialMap. OpenAerialMap will become a platform by which drone users can share their imagery under an open license. So, as the metadata spec for OpenAerialMap and OpenImageryNetwork matures, and as soon as a publicly available place for drone users to … Continue reading OpenAerialMap, OpenImageryNetwork, MapKnitter, OpenTerrain, and OpenDroneMap (cont. 1)

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3D, Bundler, Camera Calibration, FOSS4G, Image Processing, OpenDroneMap, Optics, Photogrammetry, PMVS

OpenAerialMap, OpenImageryNetwork, MapKnitter, OpenTerrain, and OpenDroneMap

This tweet: is the beginning of some fruitful discussion, I suspect. There are some really awesome projects gaining momentum. I’ll give an overview of them as best I am able. Let’s start with the one nearest and dearest to my heart (if you’ve been reading my blog, you can skip this part): OpenDroneMap. OpenDroneMap is an open source toolkit for processing drone, balloon, kite imagery … Continue reading OpenAerialMap, OpenImageryNetwork, MapKnitter, OpenTerrain, and OpenDroneMap

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