Photogrammetry Cont Stereoscopic Parallax The apparent displacement of

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Photogrammetry Cont.

Photogrammetry Cont.

Stereoscopic Parallax The apparent displacement of the position of an object wrt a frame

Stereoscopic Parallax The apparent displacement of the position of an object wrt a frame of reference due to a shift in the point of observation, try it. F The shift is along the line of movement. F The closer the object to the frame, the larger the shift for the same shift, so parallax is a function of height. F F Parallax equations: Parallax = p = x - x 1 What is (x) ? get ground coordinates B X= p x Y= B y p H-h = Bf P get the flying height or point elevation

Stereoscopic Viewing The theory of stereoscopic viewing and parallactic angles F Conditions for viewing

Stereoscopic Viewing The theory of stereoscopic viewing and parallactic angles F Conditions for viewing a stereo model: F – See the same point from two locations Separately At, or almost at, the same time.

Animation Showing June 3, 2004 Meteor Path Over WA Courtesy of Marco Langbroek &

Animation Showing June 3, 2004 Meteor Path Over WA Courtesy of Marco Langbroek & Others

from http: //www. visualizationsoftware. com/3 dem/oldflybys. html, courtesy of : Richard Horne

from http: //www. visualizationsoftware. com/3 dem/oldflybys. html, courtesy of : Richard Horne

Stereoscopic Plotters F To compile maps, take cross sections, and DEM F Three main

Stereoscopic Plotters F To compile maps, take cross sections, and DEM F Three main components: – – – Projection system Viewing system Tracing system F Major – – Types: Optical, mechanical. Analytical, and softcopy systems: mathematical model, require computers

Orthophotos F Orthographic projection of photographs. F Uniform scale, no relief displacement. F Serve

Orthophotos F Orthographic projection of photographs. F Uniform scale, no relief displacement. F Serve as maps F Produced by “rectifying “ the photographs, now mainly through “digital image processing”. F Advantage of orthophotomaps

Orthophoto of Washington, DC

Orthophoto of Washington, DC

Ground Control for Photogrammetry F Each model requires three horizontal and four vertical control

Ground Control for Photogrammetry F Each model requires three horizontal and four vertical control points. F Control points are chosen before (marked) or after (usually) and measured by ground surveying F Using “Aerial Triangulation” control can be intensified on the photos F GPS may eliminate the need for ground control.

Integrated technology F Photogrammetry systems are installed into Total stations and LIDAR system to

Integrated technology F Photogrammetry systems are installed into Total stations and LIDAR system to suppplement and add to the data collected. F For example, LIDAR provides clouds of points (XYZ), their color is taken from the RGB value of the pixel at the same location in the photograph. F Examples

Photogrammetry Cont Stereoscopic Parallax The apparent displacement ofPhotogrammetry Cont Stereoscopic Parallax The apparent displacement of
Stereoscopic Models and Plotting Stereoscopic Viewing Stereoscopic viewingStereoscopic Models and Plotting Stereoscopic Viewing Stereoscopic viewing
Aerial Remote Sensing Parallax Definition Parallax Monoscopic andAerial Remote Sensing Parallax Definition Parallax Monoscopic and
PARALLAX ELIMINATION PARALLAX ELIMINATION In all optical instrumentsPARALLAX ELIMINATION PARALLAX ELIMINATION In all optical instruments
PARALLAX ELIMINATION PARALLAX ELIMINATION In all optical instrumentsPARALLAX ELIMINATION PARALLAX ELIMINATION In all optical instruments
Parallax LO to explore the phenomenon of parallaxParallax LO to explore the phenomenon of parallax
Measuring and Significant Digits Parallax Error Parallax isMeasuring and Significant Digits Parallax Error Parallax is
Chapter 3 Crunch Time Parallax of Stars ParallaxChapter 3 Crunch Time Parallax of Stars Parallax
Stellar Parallax Electromagnetic Radiation Stellar Parallax Given pStellar Parallax Electromagnetic Radiation Stellar Parallax Given p
Accelerated Displacement and Free Fall Displacement Displacement isAccelerated Displacement and Free Fall Displacement Displacement is
Displacement Reactions Single Displacement Reactions Single Displacement reactionDisplacement Reactions Single Displacement Reactions Single Displacement reaction
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Stereoscopic PIV SLIDE 1 Dantec Dynamics 2010 StereoscopicStereoscopic PIV SLIDE 1 Dantec Dynamics 2010 Stereoscopic
3 dtv at Stereoscopic Player and Stereoscopic Multiplexer3 dtv at Stereoscopic Player and Stereoscopic Multiplexer
Photogrammetry Introduction Photogrammetry the science art and technologyPhotogrammetry Introduction Photogrammetry the science art and technology
Photogrammetry Introduction Photogrammetry the science art and technologyPhotogrammetry Introduction Photogrammetry the science art and technology
Photogrammetry Introduction Definition of Photogrammetry the art sciencePhotogrammetry Introduction Definition of Photogrammetry the art science
1 1 PHOTOGRAMMETRY GENERAL Photogrammetry can be defined1 1 PHOTOGRAMMETRY GENERAL Photogrammetry can be defined
Photogrammetry Introduction Definition of Photogrammetry the art sciencePhotogrammetry Introduction Definition of Photogrammetry the art science
Photogrammetry Photogrammetry The art science and technology ofPhotogrammetry Photogrammetry The art science and technology of
Measurement Measurement Definitions 1 Parallax apparent shift inMeasurement Measurement Definitions 1 Parallax apparent shift in
Transmission Line Problems EEE 211 Cont cont ContTransmission Line Problems EEE 211 Cont cont Cont
bulk density or apparent density 1 6 Apparentbulk density or apparent density 1 6 Apparent
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