Method and Apparatus for Acquiring Images of Car License Plates
First Claim
1. An apparatus for acquiring images of car license plates, the apparatus is configured to be part of an LPR (License Plate Recognition) system, the apparatus comprising:
- a. a camera for acquiring the images, having a focus shift corrected lens;
b. a multi band-pass filter coupled to said focus shift corrected lens, configured for allowing only wavelengths of multiple predetermined spectrum ranges to reach said lens;
c. LEDs (Light Emitting Diodes), each one of said LEDs is configured for emitting light in at least one of said multiple predetermined spectrum ranges for the purpose of illuminating the car license plates and their vicinity; and
d. an illumination control board coupled to said LEDs and to said camera, for controlling operation of said LEDs and of said camera.
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Accused Products
Abstract
Apparatus and method for acquiring images of car license plates, the apparatus is configured to be part of an LPR (License Plate Recognition) system. The apparatus includes a camera, a multi band-pass filter, LEDs (Light Emitting Diodes) and an illumination control board. The camera is configured for acquiring the images, having a focus shift corrected lens. The multi band-pass filter is coupled to the focus shift corrected lens, being configured for allowing only wavelengths of multiple predetermined spectrum ranges to reach the lens. Each one of said LEDs is configured for emitting light in at least one of the multiple predetermined spectrum ranges for the purpose of illuminating the car license plates and their vicinity. The illumination control board is coupled to the LEDs and to the camera, for controlling operation thereof.
30 Citations
15 Claims
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1. An apparatus for acquiring images of car license plates, the apparatus is configured to be part of an LPR (License Plate Recognition) system, the apparatus comprising:
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a. a camera for acquiring the images, having a focus shift corrected lens; b. a multi band-pass filter coupled to said focus shift corrected lens, configured for allowing only wavelengths of multiple predetermined spectrum ranges to reach said lens; c. LEDs (Light Emitting Diodes), each one of said LEDs is configured for emitting light in at least one of said multiple predetermined spectrum ranges for the purpose of illuminating the car license plates and their vicinity; and d. an illumination control board coupled to said LEDs and to said camera, for controlling operation of said LEDs and of said camera. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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2. An apparatus for acquiring images of car license plates, the apparatus is configured to be part of an LPR (License Plate Recognition) system, the apparatus comprising:
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a. a camera for acquiring the images, having a focus shift corrected lens; b. a multi band-pass filter coupled to said focus shift corrected lens, configured for allowing only wavelengths of multiple predetermined spectrum ranges to reach said lens; c. LEDs (Light Emitting Diodes), each one of said LEDs is configured for emitting light in at least one of said multiple predetermined spectrum ranges for the purpose of illuminating the car license plates and their vicinity; and d. an illumination control board coupled to said LEDs and to said camera, for controlling operation of said LEDs and of said camera.
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14. A method for acquiring images of car license plates, the method comprising:
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a. emitting emitted light in at least one of multiple predetermined spectrum ranges to yield reflected light from a car license plate; b. filtering reflected light so as to allow only filtered light of wavelengths of said multiple predetermined spectrum ranges to reach a sensor of a camera; and c. acquiring multiple images of the car, wherein at least one image is acquired for each one of said multiple predetermined spectrum ranges emitted in (a);
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Specification