Videogrammetry is the process of using video footage to measure the size, shape, and other properties of objects or scenes. This can be done by hand, by measuring the objects in the video frame by frame, or by using specialized software that can track objects and automatically calculate measurements.
Videogrammetry is used in a variety of fields, from architecture and engineering to forensics and medicine. It can be used to measure the size of objects in a video, to track the movement of objects or people, or to create 3D models of objects or scenes.
There are a few different types of videogrammetry, including:
-Image-based videogrammetry: This type of videogrammetry uses images, rather than video, to measure objects and scenes. This can be done by taking multiple photos of an object or scene from different angles and using software to stitch them together into a 3D model.
-Motion capture videogrammetry: This type of videogrammetry uses special cameras and software to track the movement of objects or people. This data can then be used to create a 3D model of the object or scene.
-Stereoscopic videogrammetry: This type of videogrammetry uses two cameras, set up like human eyes, to take video of an object or scene. This creates a 3D effect that can be used to measure the size and shape of objects.
Can you do Photogrammetry from video? Yes, it is possible to do photogrammetry from video footage, although it can be more difficult than using still images. When using video footage, it is important to have a good amount of overlap between frames, as well as a consistent point of view. This can be difficult to achieve if the camera is moving around a lot, or if the video is low quality.
How can I make a 3D model for free?
There are a few ways that you can make a 3D model for free.
First, you can use a 3D modeling program like Blender. Blender is a free and open source 3D modeling program that anyone can download and use. With Blender, you can create 3D models from scratch, or you can import 3D models that you have downloaded from the internet.
Another way to make a 3D model for free is to use a 3D scanning app. There are a few different 3D scanning apps available, but one of the most popular is 123D Catch. With 123D Catch, you can take photos of an object from different angles, and the app will create a 3D model of the object.
Finally, you can also find free 3D models on the internet. There are a number of websites that offer free 3D models that you can download and use. Some of these websites include Thingiverse and TurboSquid.
Can you do photogrammetry in Blender?
Yes, it is possible to do photogrammetry in Blender. However, it is a fairly complex process and requires a lot of time and effort to get good results. There are a few different methods that can be used, and the best results will usually be achieved by combining multiple methods.
The first step is to take a series of photos of the subject from different angles. It is important to make sure that the photos overlap so that the software can accurately reconstruct the 3D model. Once the photos are taken, they need to be imported into Blender.
There are a few different ways to do this, but the most common method is to use the "Camera Calibrate" addon. This addon will automatically detect the cameras used to take the photos and will create a virtual camera in Blender that can be used to reconstruct the 3D model.
Once the cameras are calibrated, the next step is to process the photos. This can be done manually, but there are also a number of different photogrammetry software packages that can be used to automate the process.
Once the photos are processed, they need to be aligned in 3D space. This can be done manually, but there are also a number of different software packages that can be used to automate the process.
Once the photos are aligned, the next step is to generate a point cloud. This is a 3D representation of the subject that can be used to reconstruct the