A manual-scanning image reader which optically reads image such as characters and figures from a written surface by a manual scanning over said written surface, which consists of the following parts; a sensor for detecting the amount of movement of the image reader in the scanning direction as a linear movement sensor, a sensor for detecting the amount of deviation of the image reader in the direction perpendicular to the scanning direction as a deviation sensor and a device for reading in image data synchronously with output signals from the linear movement sensor in order to correct the input image data according to the output signals from the deviation sensor before eventually storing it in memory.
A document scanning apparatus includes an image signal part for generating a number of successive image signals from a document which is transported along a transport path between a pair of feeding rollers and a pair of ejection rollers, a first detection part for detecting a position of the document in the transport path where a document transport is disordered when a front edge of the document being transported comes in contact with the ejection rollers, a second detection part for detecting a position of the document in the transport path where the document transport is disordered when a rear edge of the document being transported separates from the feeding rollers, and a signal correction part for correcting a defective image signal when at least one of the first detection part and the second detection part detects the position of the document where the document transport is disordered, the defective image signal being corrected through a prescribed signal correction which is carried out for a number of image signals adjacent to the defective image signal which are received from the image signal part.
The present invention relates to a scanning type image reading apparatus. The image reading apparatus includes a generator for generating serial signals each time when the scanning system is driven by a predetermined degree, and a line sensor of the reading apparatus is caused to execute the image read out operation upon reception of said signals. The read-out image data by the line sensor is compensated in response to the detected moving speed of the scanning system detected at every predetermined degree.
A system for scanning and digitizing large images using a reseau for accuracy without obscuring the image to be scanned. The system uses two separate CCD photoreceptor arrays which are fixed in a rigid position with respect to each other and any accompany lenses and mirrors. In one embodiment, a first CCD photoreceptor array is used to scan the image while the second CCD photoreceptor array simultaneously scans the reseau. In a second embodiment, a single CCD photoreceptor array is used to first scan the reseau and then to scan the image. One illumination source illuminates the reseau while second illumination source illuminates the image. The arrangement of the lens(es) and the photoreceptor arrays allows the determination of any displacement of the scanner along the X-axis, Y-axis, and Z-axis, as well as the determination of any rotation of the scanner around the X-axis, Y-axis, or Z-axis. The position and attitude of the scanner, as determined by scanning the reseau, is used to correct any errors in the resulting image that are caused by displacement or rotation of the scanner. A large image can be scanned in separate but overlapping swaths, the overlap being used to align the swaths to create a final seamless digital image from the assembled swaths.
A guide apparatus for regulating manual movement of an image input device of the type which is manually moved across a fixed manuscript to read an image therefrom. The guide apparatus includes a guide member, such as a rail, for guiding the image input device across the manuscript in a first direction and a rolling means, such as a cylindrical roller, a set of wheels, or a set of caterpillar-type belts, connected to the first direction so that the image input device may be moved in orthogonal directions.
A manual sweeping apparatus having a housing, an image sensor, a printer, and a memory. As the housing is manually swept across an original, while keeping the housing in contact with the original, information read by the image sensor is written into the memory. Thereafter, as the housing is manually moved across a piece of recording paper, while keeping the housing in contact with the paper, the information is read out from the memory and subsequently printed on the paper. During the data-reading operation, the apparatus detects and indicates whether or not any unwritten memory area exists in the memory. During the data-printing operation, the apparatus detects said indicates whether or not any items of data to be printed are stored in the memory.
