Night Vision James Stacy Brian Herre Maurio Grando Eric Faller Chris Bawiec James Team Bender

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

Goals Low Light Vision Still Image Capture James

Resource Management James

Commercially Available Models James

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

Possible Use Surveillance Search and Rescue Property Management James

Biological Applications James

Surveillance James

Additional Functionality X-Ray Vision Motion Sensing Anti-Saturation Brian

Night Vision System Brian

Outline of Approach Optics Sensors StorageVideo Out HC11 Computer Brian

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

CCD Example of an affordable CCD 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. $25 Maurio

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 512K x 8 2-port RAM To CCD subsystem Bus 68HC11 μController 32K RAM 32K ROM VGA logic VGA output RS-232 interface Input commands Still image data Computer workstation Status LEDs Eric

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 Real-time preview of image Driven either by software or logic Framerate & resolution will depend on component speeds 60 FPS = 18 MB/sec 30 FPS = 2 MB/sec 30 FPS = 0.5 MB/sec Eric

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 Lens/Sensor - Maurio, Brian RAM/FPGA - Maurio, James VGA output – James, Chris Microcontroller – Brian, Eric Software - Eric, Chris Chris

Schedule Chris

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 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

Questions ?