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Questions tagged [photogrammetry]

Photogrammetry is the practice of determining the geometric properties of objects from photographic images.

Photogrammetry is the practice of determining the geometric properties of objects from photographic images. Photogrammetry is as old as modern photography and can be dated to the mid-nineteenth century. Photogrammetry uses methods from many disciplines, including optics and projective geometry.

http://en.wikipedia.org/wiki/Photogrammetry

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What kind of color palette is this?

Exported Iron color palette pointcloud from photogrammetry app: R -18.696 Y 20.427 Z -22.023 R? 16640 G? 13056 B? 512 and want to connect it to RGB codes like: "#00000a" "#000014" "#00001e" but it seems like scale with values 16640 13056 512…
Lukas Mac
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Which are the units of a disparity value?

I need some help with disparity maps. I was wondering which are the exact units of a disparity value? Is it pixel units or mm? Every answer would be appreciated
Tony
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OpenCV Stereo Photogrammetry- why my Z axis not in line with the principal point?

As I understand OpenCV's coordinate system, as in this diagram. The left camera of a calibrated stereo pair is located at the origin facing the Z direction. I have a pair of 2464x2056 pixel cameras that I have calibrated (with a stereo rms of…
Jack
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python photogrammetry toolbox GUI for windows

I recently studied about photogrammetry and am interested in using python photogrammetry toolbox, however I'm working on windows 10 64 bit and I don't know how to install the PPT in windows. The only related PPT GUI with Windows I can find is in …
m3wIsw3m
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How to stitch UAV images using pix4D software?

I just want to register UAV images side by side using pix4D software, but the problem is I don't have any GCPs. How do I get a mosaic where all the images are stitched properly?
snoi
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ARKit keypoints in image coordinates (2D)

Description of the "issue": I want to use keypoints (a.k.a. tie points) between two successive images from an Apple smartphone using ARKit but I can't find these. I can find 3D values in world reference frame from the ARPointCloud or…
s.k
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How can i create a 3D modeling app? What resources i will required?

I want to create a application which converts 2d-images/video into a 3d model. While researching on it i found out similar application like Trnio, Scann3D, Qlone,and few others(Though few of them provide poor output 3D model). I also find out about…
Ajay Negi
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Cloud Vision Api and Photogrammetry

I'm building an android app with Cordova in which I want to show two or more photos of objects and resize those photos based on their true length. As a solution, I want to put an object of a known size like a ruler or a pen within the object of the…
Aleksis Karampinakis
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Estimating Distance From an Image

Assuming that the person stands parallel to a wall. The person and the wall are at the same ground level. The person takes a picture of the wall (Considering that the person always captures the bottom edge of the wall). Hypothesis: It is obvious…
Sakala Bhargava Ram
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create 3D Object from found images from various sources

I'd like to use a program to at least partially digitally reconstruct a 10-foot-tall human statue using 15 or so images taken from different sources gathered from google images. The idea is to use these images as "scans" in order to digitally…
dillon23
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Meshlab Parameterization + Texture from registered rasters crashes every time

I've been trying to do some photogrammetry using visualsfm and meshlab. So far, the visualsfm works astoundingly, and can generate point clouds very easily. But meshlab, this is where the problems start flooding in. I usually start by importing the…
Swim Tunes
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Color correction matrix in 3DS max on texture

I am loading a .obj file in maxscript like this: myobject = ImportFile "anObject.obj" #noPrompt I have a color correction matrix that I need to apply to the texture that comes with the .obj file (in a .mtl file), the color correction matrix is…
Kev1n91
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how to perform dense matching between two arbitrary angle stereo pairs?

I have stereo pairs from two orbits of a satellite. I am trying to generate dense match points between these pairs so that I can estimate 3D world coordinates using elements of Satellite-Earth Geometry. Question: Which method/approach can be used…
Ashutosh Gupta
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Huge reprojection errors triangulating appropriate points on stereopair with additional GPS data

I'm solving VSLAM task using 2d-3d algo based on OpenCV library. Now I'm trying to make georeferencing using GPS data. I transform R, t of each camera and then triangulate matched points using trivial function Triangulate(const cv::KeyPoint &kp1,…
Mike
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How can I determine distance of an object over a surface from two images?

I have a picture of an object over a surface. The object is not affixed to anything. I know the dimensions of the ball. If needed, I can have multiple pictures of the same scene from different angles. I've looked around and found a few things,…
Daggrah
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