Craniofacial Phenotyper Freshman Imaging Project Sean Cooper Rebecca Klein.
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Craniofacial Phenotyper Freshman Imaging Project Sean Cooper Rebecca Klein
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Transcript of Craniofacial Phenotyper Freshman Imaging Project Sean Cooper Rebecca Klein.
Craniofacial PhenotyperFreshman Imaging ProjectSean CooperRebecca Klein
What is Imaging Science?
Combination of Physics, Mathematics, Engineering, and Computer Science
Studies technology behind scientific images
Applies this to scientific research
http://www.cis.rit.edu/
MotivationResearching a new way of assessing the difficulty of intubation as opposed to traditional methods
JACK WOJTCZAKURMC
BO HUU OF R RESEARCHER
http://www.cs.rochester.edu/research/vision/people/Bo_Hu/Picture given via email
Our AssignmentBuild a Craniofacial Phenotyper
Take a 3D image of the head
Use 3D image generated to find certain measurements
Asses the difficulty of intubation for a specific patient
What are we Measuring?Distance following the curvature of the face (3DS)
Between 7 points on the face
Also finding the volume of the head
Basic RequirementsAccuracy: Our goal is ± 0.5 mm
Cost: Our goal is $3,000
Speed: 1 to 2 second capture time, quick processing time
Robust: small, will not break easily, can be used in a variety of environments; easy/unnecessary calibration
Causes no harm to the patient
What is 3D capture?
• MAYBE ADD PICTURE? SOMETHING TO FILL IN WHITE SPACE
Methods of Depth Capture
Time of Flight
A laser is pulsed
Distance is measured from the time it takes for the pulse to return
Geometrical
Emitter + Sensor at different positions
Triangulation
Triangulation
SENSOR
LASER
Z
D
Using geometry it is possible to determine depth if you know:
The distance between the sensor and the laser (D)
The angle of incidence (Z)
Point Cloud
An output format of a 3D scanner (.ply)
Creates a collection of spatial coordinates
From this a mesh (.obj) can be created and surface distances along the curvature can be measured
Point cloud bunnyhttp://www.engineeringspecifier.com/public/primages/
pr1200.jpg
Mesh bunnyhttp://www.farfieldtechnology.com/products/toolbox/
pointcloud/bunny1w.jpg
Equipment Surveys
• ADD MORE
FaceGen
September 15, 2011
Kinect
LiDAR
http://www.saic.com/geospatial/images/lidar1.jpg
Structured Light Scanner
DAVID Laser Scanner
http://www.david-laserscanner.com/
PortabilityAccuracy (± .5mm)
Robustness Speed Cost
Kinect
LiDAR(Time of Flight)
Structed Light difficult to calibrate
DAVID Laser Scanner
Line Scanner 20 minute capture
time
Z-Scanner
Modulated Light
C3D
Stereoscopic System
Photometric System
Silhouette
Conoscopic Holography
GoodFairPoor
Schedule
Fall
• Research• Equipment Surveys• Demonstrations of 3D capture • Pugh Analysis (narrowing down to 3 options)
PDR Prelimary Design Review
Winter
Continue with Pugh Analysis• Trade off studies to test different options• Develop a design (by week 7)• Choose final system option(s) and create Work Breakdown Structures for each
CDR Critical Design Review
Spring
• Complete final design• Buy components• Build system(s)• Test system(s)• Have final product for
Extract measurements from point cloud data
Research to understand theories of Software
Coding
Questions?
