Photo Gramme Try

8/8/2019 Photo Gramme Try

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1Under the guidance of

Prof . Leena Ragha

Ms. Nisha Bhalerao

Ms. Ankita Agrawal

Mr. Vaibhav Karanjkar

Photogrammetry



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What is photogrammetry??? 'photo' - light

'gram' - drawing'metry' -measurement

Photogrammetry isthe technique of finding geometric

properties of objectsusing photographs.



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Applications Topographic Mapping.

Engineering.

Manufacturing.

Police Investigation. Geology.

Archaeologists to quickly produce plans of large or complex sites

Meteorologists as a way to determine theactual wind speed of a tornado

Used to combine live action with computergenerated imagery in movie post-production.



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PROPOSED SYSTEM

This Project aims at designing a veryefficient PhotogrammetryEngine andimplements it to find out geometricproperties of objects like height, length,

etc.

The entire system is broadly divided intotwo subsystems :

1)Image processing subsystem 2) Manipulating 3-D information

using triangulation





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1. IMAGE PROCESSING SUBSYSTEM

This subsystem validates input images forformat, size, resolution and aspect-ratio.

If all these parameters are correct thenthe image is loaded on a processingstack.

Once there are enough images on the

stack, all the images are compared tofind similar points .



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REFERENCE FRAME

x1

X-axis

Y-axis

Z-axis

Center of projection of firstperspective.

Center of projection of secondperspective.

x2

CO-ORDINATE SYSTEM 1

O

camera



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2. TRIANGULATION



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Triangulation process This process aims at finding out one internal

parameter of the camera which is requiredfor making the 3D memory model.

Z1 = d.

d = x(q-y)(y-p)/(y(y-p))



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In triangle P X1 X2,

In triangle Q X1 X2,

solving for d…

Thus, z1 is found.



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System Architecture



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Modules: Interacion module:

User interface

Functoional module Image processing module

Mathematical module

X = x1(x`+x``)/(2(x1)+x`-x``) Y = 2(x1)y`/(2(x1)+x`-x``)Z = 2(x1)d/(2(x1)+x`-x``)



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Finding similar points



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Mathematical module Calculation of Point coordinates in reference frame

Left image

Right image

Solving forl



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Solving for X.

Substitute l

Solving for Y.

Substitute l

Solving for Z



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SYSTEM REQUIREMENTS

Hardware Requirement 1024 x 786 pixel resolution display (256 colours). 512 MB RAM recommended.

1 GB of secondary data storage. 2.66 GHz Intel Pentium 4 processor (Multi-core

Recommended).

Software Requirement Windows XP or any later version. Java 2.0 Runtime Environment.



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DESIGN

Photogrammetry

SystemUser Camera

Queries

Output

images

Data Flow Diagram1. Level 0 DFD :



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Level 1 DFD :

I m a g

e s

Output

Queries

User Interface

1.5

Image Processor 1.1

Query Processor 1.3

1.4

QueryData

QueryType

ControlInformat io

n

Result

Images

Information of Images

C a l i b r a t e C o m m a n d

N o t i f i c a t i o n

C a l i b

r a t i o n

D a t a

I m a g e f o r C a l i b r a t i o n R e s u l t

Query Data

Result

ProcessedImage

User

Camera

Arithmeticprocessor

CameraCalibration

1.2



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Level 2 DFD:

1.1 Image Processor

Validation Find similar Points

Images Validateimages

ProcessedImage



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1.2 Camera Calibration:

Calibratecommand

Notification

Find CameraOrientaion

Find internalParameters

Preparecalibration

data

Orientation data

Orientation data

Internals Parameters

Image for calibration

Result

Calibration data

1 3 Q P



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1.3 Query Processor:



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1.4 Arithmetic Processor:



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1.5 User Interface:



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Progress and summary We have completed analysis part of our project

which includes formulation , systemarchitecture , DFD Diagrams.

Following conclusion was drawn from project:

Establishing user requirements right at thebeginning is crucial for development of project.

We are going to design a system that can workefficiently using already available infrastructures.



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THANK YOU



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Photo Gramme Try

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