License Plate Image-Pickup Device and Image White Balance Adjustment Method Thereof
First Claim
1. A license plate image-pickup device, comprising:
- an image-sensing module, for sensing a scene to produce an image;
a recognition module, for recognizing an object contained in the image and a license plate color feature contained in the object to produce a recognition parameter set;
a database, for storing parameter sets of reference objects and reference license plate color features respectively corresponding to the reference objects; and
a processing module, for searching the reference objects in the database according to the recognition parameter set, to obtain a corresponding reference license plate color feature, and adjusting the white balance of the image according to the corresponding reference license plate color feature.
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Abstract
A license plate image-pickup device and an image white balance adjustment method thereof applicable to vehicles. The license plate image-pickup device comprises an image-sensing module, a recognition module, a data base and a processing module. The image-sensing module senses a scene to produce an image.
The recognition module recognizes an object contained in the image and a license plate color feature contained in the object to produce recognition parameter set. The database saves parameter sets of reference objects and reference license plate color features respectively corresponding to the reference objects. The processing module searches the reference objects in the database according to the recognition parameter set, to obtain a corresponding reference license plate color feature, and adjusting the white balance of the image according to the corresponding reference license plate color feature.
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Citations
17 Claims
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1. A license plate image-pickup device, comprising:
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an image-sensing module, for sensing a scene to produce an image; a recognition module, for recognizing an object contained in the image and a license plate color feature contained in the object to produce a recognition parameter set; a database, for storing parameter sets of reference objects and reference license plate color features respectively corresponding to the reference objects; and a processing module, for searching the reference objects in the database according to the recognition parameter set, to obtain a corresponding reference license plate color feature, and adjusting the white balance of the image according to the corresponding reference license plate color feature. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image white balance adjustment method, comprising the steps of:
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providing an image-sensing module to sense a scene to produce an image; using an recognition module to recognize an object contained in the image and a license plate color feature contained in the object to produce a recognition parameter set; providing a database to store parameter sets of reference objects and reference license plate color features respectively corresponding to the reference objects; and using a processing module to search the reference objects and the reference license plate color features in the database according to the recognition parameter set, and adjust the white balance of the image according to the corresponding reference license plate color feature. - View Dependent Claims (8, 9, 10, 11)
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12. A license plate image-pickup device, comprising:
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an image-sensing module, for sensing a scene to produce an image; a recognition module, for recognizing an object contained in the image and a license plate color feature contained in the object to produce a recognition parameter set; a database, for storing parameter sets of reference objects and reference license plate color features respectively corresponding to the reference objects; a processing module, for searching the reference objects in the database according to the recognition parameter set, and determining the license plate color feature according to the reference license plate color feature; and a white balance adjustment module, for adjusting the white balance of the image according to the reference license plate color feature. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification