Abstract:
A method for correcting magnification in a photographic device is disclosed in this present invention. The point of this invention is that the magnification ratio of a photographic device is saved into a nonvolatile memory and read out for correcting the magnification in the photographic device, so that the image with correct dimension can be output from the photographic device. Therefore, this invention can provide a more efficient method for correcting magnification in a photographic device, and the quality of the image captured by the photographic device can be improved thereby.
Abstract:
An apparatus for positioning a scanning starting point of an image scanning apparatus includes a platen, carriage, and a number of marks. The X-Y coordinate system defined by the platen has an X-axis defined by a first wide margin of the platen and a Y-axis defined by a first long margin of the platen. The carriage moves along the Y direction. The marks inside the image scanning apparatus indicate different Y coordinate values. The method for positioning a scanning starting point of an image scanning apparatus is as follows: the nearest mark to the document to be scanned is first chosen as a reference point. The vector from an image starting point of the document to be scanned to the reference point is then obtained. The carriage finally moves to the reference point chosen as a starting point and proceeds to scan.
Abstract:
Using a reference pattern of the invention, discontinuous images caused by inadequate memory can be merged precisely. The reference pattern can be applied to both the flat bed scanner and the Automatic Document Feed (ADF) scanner.
Abstract:
An image reading apparatus includes: a document holder on which a document is placed; a document positioning member, wherein the document is positioned on the document holder according to the document positioning member; an image reading device for reading an image of the document positioned on the document holder; and a correcting device for correcting an inclination of the image read by the image reading device according to an inclination of the document positioning member. The inclination of the document positioning member is an inclination on the document holder for a primary scanning direction.
Abstract:
An image reading apparatus for reading by an image sensing element an original held by an original holder while performing pixel shifting operation detects the feature point of the original holder, specifies the original position on the basis of the detected feature point, and performs the first reading of the original. After reading, the apparatus shifts the relative positions of the optical image of the original and the image sensing element by a predetermined amount. Then, the apparatus detects the feature point of the original holder again, specifies the original position on the basis of the detected feature point, and performs the second reading of the original. The apparatus synthesizes the two read original images to generate one image.
Abstract:
A system and method for handling duplex documents by exploiting bleed-through of the image on the back side of a document. The images of the back sides and front sides of documents are associated with one another to assure correct output in copying, faxing, scanning, etc. This increases reliability, eases recovery from errors including paper jams. Improved document handling capabilities also include avoiding twice duplicated and skipped pages and correcting page orientation errors.
Abstract:
A scanning apparatus capable of locating a scanning starting point. The scanning apparatus includes a housing, a carriage, and a calibration paper. The housing includes a scanning platen for supporting a document to be scanned. The calibration paper is mounted on the scanning platen, adjoins one of the shorter sides of the scanning platen, and has a marked area. The marked area is defined by a set of functions and includes the scanning starting point for indicating users to locate the document to be scanned on the scanning platen according to the scanning starting point. When the carriage is moved to a scanning line, the carriage locates the scanning starting point according to the intersections of the marked area being scanned and the scanning line, and the set of functions defining the marked area.
Abstract:
An image-scanning device which includes an image input area possessing an image sensor area that reads images such as characters and graphics on a manuscript illuminated by a light source, transfers the image data corresponding to the read data in a specified size after issuing an image data transfer interrupt request; and an image processing area possessing a ring buffer that stores the image data being sent from the image input area on a specified data size basis in specified areas, and which performs image correction on the image data stored in this ring buffer between image data transfer interrupt requests from the image input area.
Abstract:
A two-line sensor type image input and processing apparatus and method for accurately determining the current scan state, start of scanning and end of scanning events, as well as estimating scanning speed corresponding thereto, and for performing high precision distortion correction on the basis of these estimated scanning speeds. This image input and processing method or apparatus may comprise 1) overall speed judgment that judges the scanning speed based on feature data from the two sensors; 2) stop state judgment that judges whether or not the image input member is in a scan stop state with the input switch for facilitating image data input in the ON state; 3) pre/post stop state speed judgment that judges the scanning speed before and after the scan stop state based on the scan stop time judged by stop state judgment and the overall scanning speed judged by overall speed judgment; 4) scan start judgment that judges whether or not the image input member started scanning; 5) scan start speed judgment that judges the scanning speed at scan start; 6) scan end judgment that judges whether or not the image input member has ended scanning; 7) scan end speed judgment that judges the scanning speed at scan end; 8) ring buffer write end position updating that uses a ring buffer as the buffer for storing image data and updates the write end address in the ring buffer; and means for correcting images based on speed and start/stop information generated from these various speed judgment devices or processes.
Abstract:
The optical photoelectric imaging apparatus adjusts automatically using closed-loop control before each scan to optimize scanning quality. Various optical components can be moved in order to align a scanned image of an object with the linear photosensor array. The device scans a target of known characteristics to determine what adjustment is needed.