Image processing system for processing a digital image and image processing method of processing a digital image
AssigneeOce-Technologies B.V.
InventorJohannes H. M. Janssen
Life of this patent
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Abstract
A processing unit for an image processing apparatus enables the reduction of background noise or disturbances on a scanned image. The processing unit is arranged to apply an image enhancement method to the luminance image data of the scanned image only and merge the obtained modified luminance image data with additional luminance image data obtained from the chrominance image data so as to recover light shades on the background that may have been removed by the image enhancement method.
Claims17
An image processing system for processing a digital image, the image processing system comprising:
- a processor, wherein the processor comprises:
- an input module for receiving the digital image, the digital image comprising luminance image data and chrominance image data;
- a background reduction module for generating modified luminance image data by applying a background reduction method to the luminance image data;
- a shade enhancement module for generating luminance correction image data by applying a shade enhancement method to the chrominance image data;
- a merging module for generating adjusted luminance image data by merging the modified luminance image data and the luminance correction image data;
- and
- a conversion module for converting the adjusted luminance image data to an output digital image.
An image processing method of processing a digital image, the method comprising the steps of:
- receiving, by a processor, a digital image comprising luminance image data and chrominance image data;
- generating, by the processor, modified luminance image data by applying a background reduction method to the luminance image data;
- generating, by the processor, correction luminance image data by applying a shade enhancement method to the chrominance image data;
- generating, by the processor, adjusted luminance image data by merging the modified luminance image data and the correction luminance image data;
- and
- converting, by the processor, the adjusted luminance image data to an output digital image.
Dependencies are inferred from the claim text.