passive text wip

topics/02_passive/index.md

@@ -46,8 +46,7 @@ Cameras were applied to photogrammetry as early as 1973, such as in
 [Imaging characteristics of photogrammetric camera systems](https://www.sciencedirect.com/science/article/abs/pii/0031866373900069)
 , an early paper describing groundwork camera properties and standards for USGS (United States Geological Survey) photgrammetry surveys.
 
-When describing photogrammetric camera systems, the following terminology are used to characterize systems: <br>
-*Intrinsics and extrinsics parameters*<br>
+When describing photogrammetric camera systems, *intrinsics and extrinsics parameters* are used to characterize systems: <br>
 Intrinsic parameters describe the properties of a camera's lens and sensor. <br>
 Extrinsic parameters describe the camera's position and orientation in 3D space
 
@@ -92,7 +91,7 @@ Light conditions in the scene are crucial to the quality of the scan. A controll
 ### 3D Software Suites
 
 [Autodesk ReCap](https://www.autodesk.com/products/recap/overview?term=1-YEAR)<br>
-[Agisoft Metashape](https://www.agisoft.com)
+[Agisoft Metashape](https://www.agisoft.com)<br>
 [Pix4D](https://www.pix4d.com/blog/machine-learning-meets-photogrammetry) - Uses ML for improving accuracy while scraping information on the contents of photogrammetry data sets.
 
 ### Apps
@@ -101,20 +100,16 @@ iPhone and Android apps for photogrammetry and now LiDAR scanning have multiplie
 [Polycam](https://poly.cam/)<br>
 [Rekrei](https://projectmosul.org/)<br>
 [Adobe Aero](https://www.adobe.com/products/aero.html)<br>
-[ScandyPro](https://www.scandy.co/apps/scandy-pro)<br> - Real Time Meshing
+[ScandyPro](https://www.scandy.co/apps/scandy-pro) - Real-time meshing <br>
 
 
+As the apps multiply, scanned objects become more widely available for both art preservation and computer graphics applications:
+
 [Scan the World](https://www.myminifactory.com/scantheworld/)<br>
 [Quixel Megascans](https://quixel.com/megascans)
 
 
 
-# Camera Properties
-
-Creality Ferret Pro
-Iphone 13
-
-
 
 
 # Light Field