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Team Bender. Night Vision. James Stacy Brian Herre Maurio Grando Eric Faller Chris Bawiec. James. Objectives. Implement A CCD (Charge Coupled Device) Imaging System Provide VGA Output Provide User Interface. James. Goals. Low Light Vision Still Image Capture. James.

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night vision

Team Bender

Night Vision

James Stacy

Brian Herre

Maurio Grando

Eric Faller

Chris Bawiec

James

objectives
Objectives
  • Implement A CCD (Charge Coupled Device) Imaging System
  • Provide VGA Output
  • Provide User Interface

James

goals
Goals
  • Low Light Vision
  • Still Image Capture

James

functions
Functions
  • User Interface:
  • Computer Interface via RS-232
  • Still Image Output via RS-232
  • Output Video Stream via VGA

James

possible use
Possible Use
  • Surveillance
  • Search and Rescue
  • Property Management

James

additional functionality
Additional Functionality
  • X-Ray Vision
  • Motion Sensing
  • Anti-Saturation

Brian

outline of approach
Outline of Approach

Sensors

Optics

Storage

Video Out

HC11

Computer

Brian

i o of system blocks
I/O of System Blocks
  • Optics (lens)
    • Input: Photons from the environment
    • Output: Focused light
  • Infrared Sensors
    • Input: Infrared Information
    • Output: Digital Image Data
  • HC11
    • Input: Computer commands

-Turn on, Test Connection, Take a picture, etc.

RAM

- Still Image Data

    • Output: Still Image
  • Video Out
    • Input: Digital Image Data
    • Output: Video Image

Brian

further details

lens

  • Needed to focus light onto CCD sensor
  • Need to optimize distance between lens and CCD
    • More research is needed

Further details

Filters

  • Not needed in dark areas
  • Still useful for dimly lit areas
  • Filter types: red #25 (transparent), infrared #89b (nearly opaque), and infrared #87c (completely opaque).

Maurio

slide15
CCD

Example of an affordable CCD

$25

  • Question:
  • How can we tell if the CCD is sensitive enough to near infrared light emitted from objects in a dark room?
    • We know that companies sell LED’s in a wide range of frequencies in the infrared spectrum.
    • These can be used the “light up” the room with infrared light at a frequency (more or less) of our choice.

Maurio

transfer the info
Transfer the info
  • We don’t know how fast the CCD will transfer the data yet so..
    • We feed the output of the CCD into some gate logic (like an FPGA)
    • This gate logic in turn feeds the incoming picture into a 2-port RAM and stores it there.

Maurio

video computer interfaces
Video & Computer interfaces

512K x 8

2-port RAM

Bus

To CCD

subsystem

Status

LEDs

32K

RAM

32K

ROM

68HC11 μController

VGA

logic

RS-232

interface

Computer workstation

VGA

output

Still image data

Input commands

Eric

hc11 microcontroller
HC11 Microcontroller
  • Standard Capstone component
  • Controls other components
    • Disables video while taking still shots
  • Interface to computer
    • Reads input commands
    • Uploads images

Eric

vga output
VGA Output
  • Real-time preview of image
  • Driven either by software or logic
  • Framerate & resolution will depend on component speeds
    • 640x480 @ 60 FPS = 18 MB/sec
    • 320x240 @ 30 FPS = 2 MB/sec
    • 160x120 @ 30 FPS = 0.5 MB/sec

Eric

computer interface
Computer interface
  • RS-232 provided by microcontroller
  • Download software updates
  • Upload still images to computer
  • Send commands to camera
    • Reset
    • Enable/disable video preview
    • Take picture

Eric

division of labor
Division of Labor
  • Lens/Sensor - Maurio, Brian
  • RAM/FPGA - Maurio, James
  • VGA output – James, Chris
  • Microcontroller – Brian, Eric
  • Software - Eric, Chris

Chris

risks
Risks
  • Lens – too expensive
  • CCD – not sensitive enough to infrared
  • VGA – Bandwidth too high for component speeds
  • HC11 – Can’t get it performing all necessary tasks.

Chris

contingency plan
Contingency Plan
  • Lens – Find a low grade camera lens
  • CCD – Take picture at different frequency
  • VGA – Output at lower frame rate
  • HC11 – Simplify HC11’s tasks

Chris

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