From c84a78ded5ffbdbf37ea812704444596b3eeaadd Mon Sep 17 00:00:00 2001 From: Danny Griffin <dgr@mit.edu> Date: Tue, 23 Apr 2024 16:45:55 -0400 Subject: [PATCH] test add iframe --- topics/02_passive/index.md | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/topics/02_passive/index.md b/topics/02_passive/index.md index e180879..8aeeb32 100644 --- a/topics/02_passive/index.md +++ b/topics/02_passive/index.md @@ -33,11 +33,19 @@ Photogrammetry is the collection and organization of reliable information about <p>Early uses in stereophotogrammetry, the estimation of 3d coordinates from measurements taken from two or more images through the identification of common points. This technology was used throughout the early 20th century for generating topographic maps.</p> <p><img src="images/stereo_plotter.jpg" alt="StereoPlotter"></p> +<p>stereophotogrammetry is now being used for capturing dynamic characteristics of previously difficult to measure systems like running <a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8348/1/Dynamic-characteristics-of-a-wind-turbine-blade-using-3D-digital/10.1117/12.915377.short?SSO=1">wind turbines</a>.</p> +<p>Photogrammetry is useful for outdoors settings, where all you need is a handheld camera and some patience. In this example, note the loss of quality towards the top, as pixel resolution becomes problematic:</p> + +<div class="sketchfab-embed-wrapper"> <iframe title="Arc de Triomphe - photogrammetry" frameborder="0" allowfullscreen="" mozallowfullscreen="true" webkitallowfullscreen="true" allow="fullscreen; autoplay; vr" xr-spatial-tracking="" execution-while-out-of-viewport="" execution-while-not-rendered="" web-share="" src="https://sketchfab.com/models/65937fd27de647c0a8ac99ce8275c03e/embed"> </iframe> <p style="font-size: 13px; font-weight: normal; margin: 5px; color: #4A4A4A;"> <a href="https://sketchfab.com/3d-models/arc-de-triomphe-photogrammetry-65937fd27de647c0a8ac99ce8275c03e?utm_medium=embed&utm_campaign=share-popup&utm_content=65937fd27de647c0a8ac99ce8275c03e" target="_blank" style="font-weight: bold; color: #1CAAD9;"> Arc de Triomphe - photogrammetry </a> by <a href="https://sketchfab.com/nicolasdiolez?utm_medium=embed&utm_campaign=share-popup&utm_content=65937fd27de647c0a8ac99ce8275c03e" target="_blank" style="font-weight: bold; color: #1CAAD9;"> Nicolas Diolez </a> on <a href="https://sketchfab.com?utm_medium=embed&utm_campaign=share-popup&utm_content=65937fd27de647c0a8ac99ce8275c03e" target="_blank" style="font-weight: bold; color: #1CAAD9;">Sketchfab</a></p></div> # Key Benefits +<p>Geometry and texture/color in one workflow.</p> +<p>Affordability and flexibility. Depending on the end use application almost any camera will work given there is enough light and your post processing software is robust.</p> +<p>Real time feedback and processing as models improve. <a href="https://mars.nasa.gov/technology/helicopter/#">Ingenuity Drone</a></p> +<p><img src="img/lidar-vs-photogrammetry-drone.jpg" alt="Drone imaging"></p> # Key Challenges -- GitLab