12-04-2013, 03:02 PM
OCR(optical character recognition)
OCR.pptx (Size: 209.45 KB / Downloads: 23)
AIM
To monitor the speed of vehicles on highways and trace violators by taking note of their vehicle number.
Principle
To acquire Speed of vehicles on highways and to find any vehicle over speeding
By using OCR(optical character recognition) to take note of their vehicle number and inform the proper authorities.
working
Camera will continuously take the video
Camera will capture the image from the video
Get number plate image
Convert image to text using OCR.
Save the text file to database for further processing.
IR Working
Here we are connecting a IR based obstacle sensor. The 50 ohm resister is for current limiting. The current through the LED is 5v / 50 ohm = 100 mamp, which is high for an LED. But to increase the range of the obstacle sensor we are using a lower range resistor (50 ohm).
On the receiver side we have connected the IR receiver in reverse bias. So as soon as the light falls in the IR receiver, the anode voltage increases and when the anode voltage is more than the cathode voltage then the LED is in forward bias mode and start conducting.