Document reading apparatus having a function of determining effective document region based on a detected data
First Claim
Patent Images
1. A document reading apparatus comprising:
- means for imaging a document placed on a document holder from above;
detecting means for detecting a position of a hand or a finger other than a document placed on the document holder based on an output from the imaging means; and
processing means for processing the output from the imaging means based on an output from the detecting means.
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Accused Products
Abstract
A document reading apparatus which can determine an effective image pickup area containing no object such as operator'"'"'s hands or fingers pressing a document and rectify image data prior to imaging operation, making use of a difference of the object from the document in chromaticity, luminous density, and the like.
67 Citations
24 Claims
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1. A document reading apparatus comprising:
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means for imaging a document placed on a document holder from above; detecting means for detecting a position of a hand or a finger other than a document placed on the document holder based on an output from the imaging means; and processing means for processing the output from the imaging means based on an output from the detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A document reading apparatus comprising:
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means for imaging a document placed on a document holder from above; detecting means for detecting a position of a hand or a finger other than a document placed on the document holder based on an output from the imaging means; and processing means for processing to delete an image data of the object, on the basis of detecting the result of the detecting means. - View Dependent Claims (10)
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11. A document reading apparatus comprising:
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a first imaging means for imaging a document placed on a document holder and obtaining a picture element output of three colors of red, green, and blue; calculating means for calculating a chromaticity of two specified colors from the imaged picture element output of three colors of red, green, and blue; judging means for judging, from the chromaticity of the two colors, whether or not the imaged picture element output is of a predetermined color; a second imaging means for imaging the document; and rectifying means for rectifying to delete an image data of the second imaging means on the basis of a judgment result of the judging means.
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12. A document reading apparatus comprising:
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a first imaging means for imaging a document placed on a document holder and obtaining a picture element output of three colors of red, green, and blue, wherein a flesh color region is detected; calculating means for calculating chromaticity of two specified colors from the imaged picture element output of three colors of red, green, and blue; judging means for judging, from the chromaticity of the two colors, whether or not the imaged picture element output is of a predetermined color; a second imaging means for imaging the document, wherein an image region containing characters or pictures is detected; rectifying means for rectifying an output from the said second imaging means on the basis of an output from the above judging means; and a warning means for warning when the flesh color region and the image region are overlapping.
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13. A document reading apparatus comprising:
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means for scanning a document to provide image signals; first means for processing the image signals to determine that portion of the scanned document image signals that contains printing; second means for processing the image signals to determine that portion of the scanned document image signals that represents a hand or a finger; and means for providing a warning to an operator when the second means determines a hand or a finger are represented in the image signals.
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14. A document reading apparatus comprising:
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means for scanning a document to provide image signals; first means for initially scanning the document with the scanning means to determine that portion of the scanned document image signals that represents a hand or a finger and storing the same; and second means for subsequently scanning the document to provide image signals with that portion of the document including a hand or a finger removed from the image signals.
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15. A document reading apparatus comprising:
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an imager for imaging a document placed on a document holder; a detector for detecting a position of a hand or a finger other than a document placed on the document holder based on an output from the imaging means; and a processor for processing the output from the images based on an output from the detector. - View Dependent Claims (16, 17, 18, 19)
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20. A document reading apparatus comprising:
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an imager for imaging a document placed on a document holder from above; a detector for detecting a position of a hand or a finger other than a document placed on the document holder based on an output from the imager; and a processor for processing the imager output to delete an image data of a hand or a finger, on the basis of the detected results of the detector. - View Dependent Claims (21)
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22. A document reading apparatus comprising:
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an imager for imaging a document placed on a document holder from above; a detector for detecting an area of luminous density above a predetermined value within a predetermined area of the document, based on an output from the imager in the predetermined area of the document, the predetermined area being positioned at an end portion of the document and not influenced by any luminous density of image information of the document to be imaged; and a processor for processing an output of the imager to delete any image data corresponding to the area of the luminous density above the predetermined value in the predetermined area, based on an output from the detector. - View Dependent Claims (23)
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24. A document reading apparatus comprising:
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an imager for imaging a document placed on a document holder from above; a detector for detecting a position of an object other than a document placed on the document holder based on an output from the imager; and a processor for processing an output of the imager to delete any image data of the object on the basis of the detected result of the detector.
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Specification