What is photogrammetry?
Tornado photogrammetry is the use of film or video to determine the speed of movement of some kind of tracer: usually a large piece of debris or a persistent cloud element. From these, the wind speed can be inferred with varying and sometimes unknown reliability. Photogrammetric analyses of tornadoes used to be much more common in the 1970s and 1980s than today. Now, portable Doppler radars like the DOW are the main tools used in the effort to determine the strength of tornado winds. Major difficulties with photogrammetry of tornadoes include: • Only the component of motion across the field of view can be measured; • Usually, only debris in the outer part of the tornado can be tracked, because of dust and cloud material cloaking any objects farther in, causing a failure to sample many of the theoretically stronger winds; and • Debris large enough to film from a safe distance, and to track across many movie or video frames, may be moving much slower than the wind carrying it. Still, pho
Photogrammetry is a co-ordinate measuring technique to generate 3D-co-ordinates of points & features from a group of photographs taken from different points in space. This science is being used for various applications ranging from generating maps from satellite or aerial photographs to calculate the precise 3D-co-ordinates of industrial parts ranging in size from a few mm to as large as 50 m (or more). We restrict our description to measuring 3D-co-ordinates of points on industrial parts. Process- Pictures are taken by a high resolution digital camera from different view points and sent to a computer via physical connection or wireless connection. Intelligent software collates all the pictures and does a bundle analysis to calculate 3D co-ordinates of marked points. Why is photogrammetry required ? Can we scan without photogrammetry ? In order to get a better accuracy in scanning process we do photogrammetry. The concept of photogrammetry is to precisely calculate the coordinate of th
Photogrammetry is a co-ordinate measuring technique to generate 3D-co-ordinates of points & features from a group of photographs taken from different points in space. This science is being used for various applications ranging from generating maps from satellite or aerial photographs to calculate the precise 3D-co-ordinates of industrial parts ranging in size from a few mm to as large as 50 m (or more). We restrict our description to measuring 3D-co-ordinates of points on industrial parts. Process- Pictures are taken by a high resolution digital camera from different view points and sent to a computer via physical connection or wireless connection. Intelligent software collates all the pictures and does a bundle analysis to calculate 3D co-ordinates of marked points.
