PhotoGRammetry
PHOTOGRAMMETRY
WHAT IS PHOTOGRAMMETRY?¾PHOTOGRAMMETRY REVERSESTHE PROCESS OF PHOTOGRAPHY,TRANSLATING 2D INFORMATIONINTO 3D DATA.
HOW DOES IT WORK?¾¾REQUIRES AT LEAST 2CAMERAS, YET MORECAMERAS CREATE BETTERRESULTSCOMPUTES COORDINATES BYUSING TRIANGULATION ANDRESECTION
TRIANGULATION¾TAKE PHOTOGRAPHS FROM TWODIFFERENT LOCATIONS, "LINES OFSIGHT" DEVELOPED
TRIANGULATION¾THESE LINES AREMATHEMATICALLYINTERSECTED,PRODUCE 3DDIMENSIONALCOORDINATES
TRIANGULATION¾SAME AS STEREOPSIS FOR PEOPLEAND ANIMALS (RETINALDISPARITY)
TRIANGULATION¾CAMERALOCATIONAND ANGLEMUST BEKNOWN
RESECTION¾PROCEDURE USED TO DETERMINEFINAL AIMING AND LOCATION(ORIENTATION)
RESECTION¾MUST KNOW SIXCOORDINATES, 3FOR POSITION, 3FOR ANGLE
RESECTION¾WITH LINES OF SIGHT KNOWNAND ORIENTATION, 3D DATACAN BE CAPTURED
WHAT IS NEEDEDHARDWARE¾¾¾DIFFERING MULTI-CAMERA SET UPSMULTI BLACK AND WHITE CAMERAS, ONECOLORPRIMARY CAMERAS TO THE SIDES
WHAT IS NEEDEDSOFTWARE¾CUSTOM SOFTWARE PACKAGES¾FACIAL RECONSTRUCTION¾PICTORIAL AVERAGING¾TEXTURE MAPPING
APPLICATIONS¾¾¾¾¾¾SECURITYDATABASESFACE RECOGNITIONMEDICALANTHROPOMETRIC ANALYSISBEAUTY RESEARCH
TYPES OFPHOTOGRAMMETRY¾¾THERE ARE SEVERAL TYPES OFPHOTOGRAMMETRY: AERIAL,TERRESTRIAL, AND CLOSERANGER.AERIAL IS THE MOSTCOMMONLY USED
AERIAL PHOTOGRAMMETRY¾¾A CAMERA IS MOUNTED IN AN AIRCRAFTAND IS USUALLY POINTED VERTICALLYTOWARDS THE GROUNDMULTIPLE OVERLAPPING PHOTOS OF THEGROUND ARE TAKEN AS THE AIRCRAFT FLIESALONG A FLIGHT PATH
AERIAL PHOTOGRAMMETRY¾THESE PHOTOSARE PROCESSEDIN A STEREOPLOTTERAINT IT CUTE-
WHAT IS A STEREOPLOTTER?¾DUPLICATES THE POSITION ANDORIENTATION OF THE AERIALCAMERA AT THE TIME ANINDIVIDUAL STEREO PAIR WASACQUIRED
MOST WIDE SPREAD USE OFPHOTOGRAMMEY¾THECONSTRUCTIONAND REVISIONOFTOPOGRAPHICMAPS
AERIAL PHOTOGRAMMETRY¾IDENTIFIABLE POINTS ON THEGROUND (GROUND CONTROLPOINTS) ARE USED TO DETERMINEDISTANCES AND GEOMETRICPROPERTIES OF THE IMAGE
DISTORTION¾TYPES OF DISTORTION:¾RELIEF DISPLACEMENT -CAUSES TALLOBJECTS TO APPEAR TO LEAN AWAY FROM THE CENTEROF THE IMAGE¾STEREOSCOPIC PARALLAX -APPARENTSHIFT OF AN OBJECT WITH RESPECT TO A POINT OFREFERENCE
DISTORTION CORRECTION¾IN ORDER TOCORRECTTHESEDISTORTIONS,OVERLAPPINGPHOTOS ANDGROUNDCONTROLPOINTS AREINTEGRATEDTO PRODUCE ASTEREO MODELOF THETERRAIN
TOO THE FUTURE!!!¾THE USES OF PHOTOGRAMMETRY AREEXPANDING INTO MANY NE AND PROSTHETICSBIOLOGY AND ZOOLOGYARCHITECTURAL STUDY & PRESERVATION
HOW ITS BEING USED IN FORENSICS¾GATHERING EVIDENCE¾CRIME SCENE PRESERVATION¾EVIDENCE PRESERVATION AND CATALOGING
HOW ITS BEING USED IN LANDSCAPING¾RECORDING LAND MOVEMENTS¾AERIAL MAPPING
HOW ITS BEING USED IN MEDICINE & PROSTHETICS¾HUMAN MEASUREMENTS¾PROSTHETICS RESEARCH¾ATHLETIC STUDIES OF BODILY MOTIONS ANDMOVEMENTS
HOW ITS BEING USED IN BIOLOGY & ZOOLOGY¾¾DATA CAPTURE AND RECORDING OF PLANTSAND ANIMALSINCREASED STUDY OF AQUATICUNDERWATER LIFE
HOW ITS BEING USED IN ARCHITECTURAL STUDY &PRESERVATION¾PRESERVATION OF AGING OR DECAYINGMONUMENTS¾CATEGORIZING HISTORICAL REMAINS¾HISTORICAL MONUMENT RECONSTRUCTION
¾the uses of photogrammetry are expanding into many different fields: ¾forensics ¾landscape ¾medicine and prosthetics ¾biology and zoology ¾architectural study & preservation.
Photogrammetry is a cost efficient surveying method for mapping large areas. Photogrammetry may be safer than other surveying methods. It is safer to take photographs of a dangerous area than to place surveyors in harms way. Photogrammetry provides the ability to map areas inaccessible to field crews.
photogrammetry. He developed the analytical solutions to space resection, orientation, intersection, rectification, and control extension using direction cosines. Church, a professor at Syracuse University and one of the founding members of the American Society of Photogrammetry, is referred to as the "American Father of Photogrammetry".
Photogrammetry has been previously validated as an effective technology for documenting both damaged vehicles and scenes [1,2,3,4,5,6,7,8,9,10,11,12]. Modern photogrammetry uses the same photogrammetric principles, but requires less user input and delivers more data points in its solution. Photogrammetry software is capable
Unity Photogrammetry Workflow 3 1. Overview 1.1. Introduction What is photogrammetry? Photogrammetry is the process of authoring a digital asset using multiple photos of the original real-
White light scanner (point clouds) Photogrammetry solutions. 18 22/08/2017 Photogrammetry solutions Photogrammetry (Single points, Adapter, Features) . White-Light Scanner (Structured light) Very high accuracy (down to some µm) Highest resolution Scalable for different volumes (mm to several m)
4.1.4 Aerial Photogrammetry Aerial photogrammetry is the science of deducing the physical dimensions of objects on or above the surface of the Earth from measurements on aerial photographs of the objects. The end result produces the coordinate (X, Y, and Z) position of a particular point, a planimetric feature, and a graphic representation
Digital Photogrammetry The digital, or soft copy, photogrammetry systems (Figure 8) are much simpler in design than the analytical systems; they consist of a computer with a stereo-capable graphics system, 3-D glasses with electronic shutters, and a “3-D mouse” as a user interface. The 3-D mouse is a
In order to simplify understanding an abstract definition and to get a quick grasp at the complex field of photogrammetry, we adopt a systems approach. Fig. 1.3 illustrates the idea. In the first place, photogrammetry is considered a black box. The input is characterized by obtaining rel
