ELECTRICAL & COMPUTER

ENGINEERING

Colorado State University

Spatial Frequency

Modulation for Imaging

Nick Galvan

Tyler Green

Outline

Objective

How SpatIal Frequency modulation for Imaging (SPIFI) Functions

Influence

Our Design

Current Status

Deo-Nano Programming

Budget

Future Status

Applications

Questions and Comments

Objective

To develop real time 3 dimensional

imaging with SPIFI

To collaborate with Colorado School of

Mines on 3 dimensional aspect

To solve engineering problems of

developing new modulation methods for

imaging by developing software to drive

an LED matrix

How SPIFI Functions (LED Matrix)

FFT

−𝑓1 𝑓1

𝑠(𝑥) f(𝑥)

I I

𝑓1 𝑓2

𝑓3

𝑓4

𝑓5 𝑓6

Object

Photodetector

Project Influence

Developed by Greg Futia, David Winters, and

Randy Bartels

Input Beam

Cylindrical Lens

Modulation Plane

Imaging Objects

Object

Collection Optics

Detector

Our Design

FPGA

LED Matrix

f1 f2 f3

Fresnel Lens Condenser

Photodiode

Computer

Our Design

Current Status

Current Status

Focusing on noise minimization

Development of multiple harmonic detection

Optimizing drive speed based off of duty

cycle

De0-Nano Programming

FPGA Programming

Verilog

Pin Assignments

JTAG Server

Processing

JTAG Port Connection

Screen Capture

Individual Columns

Modulus PWM Function

Development

Verilog Schematic

Development

CLK

PWM Function Development

BUS Color

Assignments

Budget Component Quantity Individual Cost Total Cost

32X32 LED Matrix Panel 5 $111.95 $559.75

Microcontroller 2 $58.95 $117.90

FPGA De0-Nano 2 $59.00 $118.00

Photodiode 1 $112.00 $112.00

Female Jumper Wires 24 $14.00 $14.00

Sound Card ASUS Xonar DX

7.1

1 $79.99 $79.99

Fresnel Lenses 5x5 inch 5 $49.50 $247.50

Overall Total = $1289.14

Future Status

2 & 3-D image mapping

Development of a photodiode

Development of Fourier image analysis

program for multiple harmonics

Demonstrate project in spring to local

schools to promote sciences

Applications

Optical Coherence

Tomography

Depth Penetration

Imaging

Tomographic imaging

Material Sciences

Stress Fracture Visualization

Semiconductor Inspection

Real Time Imaging

Cardiovascular flowmetry

Questions and Comments