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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


Night vision
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


Schedule
Schedule

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