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AssigneeNikon Corporation
InventorsToru Ochiai, Shoei Nakamura
Estimating the term…
An image can be read during main scanning under an optimized image reading condition even if dust is attached to a document such as a photographic film or the like, or if there are scratches. A scanner irradiates visible light and infrared light from a light source, and an image of the document is separated into infrared and visible components. These components are detected for pixels of the image by an image sensor. A controller, e.g., of the scanner recognizes defective pixels based on the infrared component. Furthermore, the controller corrects a visible component level in the defective pixel based on the infrared component level of the defective pixel and a reference level obtained where there is no defect, in order to create a histogram. The controller determines image reading conditions such as, for example, an exposure amount (exposure time) for use during main scanning and an LUT gradation conversion characteristic based on this histogram.
An image reading device comprising:
An image reading device comprising:
A computer readable storage medium that stores a control program to control an image reading device having an illumination system that irradiates a document with visible light and infrared light, and an image detection system that detects an infrared component of an image of the document and a visible light component of the image of the document, the control program comprising:
A computer data signal, embodied in a carrier wave, and representing a control program to control an image reading device having an illumination system that irradiates a document with visible light and infrared light, and an image detection system that detects an infrared component of an image of the document and a visible light component of the image of the document, the control program comprising:
A method of controlling an image reading device that reads an image from a document, the method comprising the steps of:
An image reading device comprising:
An image reading device comprising:
A computer readable storage medium that stores a control program to control an image reading device having an illumination system that irradiates a document with visible light and infrared light, and an image detection system that detects an infrared component of an image of the document and a visible light component of the image of the document, the control program comprising:
A computer data signal, embodied in a carrier wave, and representing a control program to control an image reading device having an illumination system that irradiates a document with visible light and infrared light, and an image detection system that detects an infrared component of an image of the document and a visible light component of the image of the document, the control program comprising:
A method of controlling an image reading device that reads an image from a document, the method comprising the steps of:
Dependencies are inferred from the claim text.