Abstract: In accordance with the present invention, an operating procedure of a scanning system with one-scan-and-done feature is disclosed. The operating procedure comprises steps of receiving parameters input by a user, scanning an original responsive to the parameters, displaying an image corresponding to the original, receiving a portion of the image selected by the user, and outputting the selected image. The present invention can be extended to a scanning method for using a scanning system with one-scan-and-done feature and a scanning system with one-scan-and done feature.

Abstract: In accordance with the present invention, an operating procedure of a scanning system free of identifying original's attribute comprises steps of scanning at least one original free of identifying original's attribute to generate at least one image, wherein the images present all contents of the originals, displaying the images on a preview window, receiving a portion of the preview window selected by a user, and scanning a portion of the originals corresponding to the portion of the preview window. The present invention further extends to a scanning system free of identifying original's attribute and a scanning method without identifying an original's attribute by a user.

Abstract: A method for capturing images useful in a scanning system is provided. The present method comprises performing a preview scan of a picture and then displaying the preview image of the picture on a screen. Selecting a scanning area of the preview image and simultaneously performing a first normal scan of the picture from an initial scanning position relative to the picture. When the scanned area of the first normal scan corresponds to the selected scanning area, the scan image produced by the first normal scan is displayed. Otherwise, a second normal scan of a portion of the picture that corresponds to the selected scanning area is performed to produce a final scan image.

Abstract: A method for dynamic calibration uses multi-sampling point distribution to analyze different distributions, then dynamically decides the total number of points counted and the best calculating method for the final calibration in order to get the most stable, accurate, and best calibrating result with different scanners and situation. Method of calculation include direct averaging, weighed average, multi-fixed-range averaging, and standard deviation range averaging.

Abstract: A transmission mechanism for optical scanner includes a screw bar, a first nut, a second nut, a retainer, a first spring and a second spring. The screw bar has external threads engageable with internal threads of the first and second nuts. The first nut is close to the transmission direction. The retainer is hollow and has a front and a rear wall to hold the first and second nut therebeween. The first nut makes contact with the front wall. The first spring is located between the first and second nut. The second spring has a stronger force than the first spring and is located between the second nut and the rear wall. The spring force keeps the rear side of the internal threads of the first nut make close contact with external threads of the screw bar, and the front side of the internal threads of the second nut make close contact with the external threads so that the first and second nut may be free from vibration during transmission operation.

Abstract: The present invention proposes a method for detecting the relative location of an image reading head and a light source, and the method is especially designed for the application in a scanning system for transparent originals. The method in the present invention, for detecting the relative location of an image reading head and a light source in an image reading system, includes several steps as follows. At first, the light source is positioned to a first detecting point in a scanning region of the image reading system. The image reading head is moved to pass through the first detecting point while keeping the light source fixed at the first detecting point. At the same time, the scanned images are recorded through the moving process of the image reading head. Finally, the scanned images is processed to provide functional information of the image reading head and the light source.

Abstract: The present invention provides a calibration method used in an image-capture apparatus. The method comprises providing a calibration chart not built in the image-capture apparatus. Users can select any kind of calibration chart by themselves. The calibration chart consists of pixels arranged in a two-dimensional array, which can prevent dark lines on the output of a scanned article. The information of the calibration chart is captured by the image-capture apparatus and then subjected to a correction means, such as a low-pass filter, whereby corrects aberrance of the information.

Abstract: A drive mechanism for a scannerincludes a delivery device, a first rotational speed motor and a second rotational speed motor. The delivery device consists of an actuating wheel, a passive wheel and a conveyor belt. The conveyor belt is carried by the actuating wheel and the passive wheel, and the axes of the passive wheels are attached to two ends of the inner side diameter of the actuating wheel. The output shaft of the first rotational speed motor is provided with an actuating skew gear that engages two passive skew gears. The output shaft of the second rotational speed motor is also provided with an actuating skew gear that engages two passive skew gears. The drive mechanism uses the two motors to drive the two passive skew gears so as to better control the rotational speed and to scan the document image.

Abstract: A document-loading panel structure for scanner is characterized that a document-loading panel of scanner and an up housing are made of a transparent acrylic material or the like by integral molding; and a chart is either printed or attached on the up housing, a document cover, and/or the document-loading panel.

Abstract: A structure of foldable optical path is suitable for use in an optical scanner with a CCD type or a type of non-contact imaging sensor. The structure of foldable optical path arranges a part of the optical path in a foldable packing device, thus the scanner is able to utilize normal lens with better depth of field and makes the scanner more compact for the convenience of operation and carrying.

Abstract: A method enabling a scanning range of a normal scan to map a predetermined range selected under preview in a scanning device is provided. The present invention is characterized in calculating excess control pulses sent to a stepping motor resulting from accumulated pixels during respective exposure times at different scanning resolutions, and accordingly determining the number of control pulses required to send to the stepping motor for a normal scan for scanning a predetermined range selected under preview, so as to exactly map the scanning range of the normal scan to the predetermined range.

Abstract: A method of reading pixel signals from a staggered sensor comprises providing the staggered sensor which comprises at least two linear image sensors, wherein a plurality of photocells of one linear image sensor are offset abutting with a plurality of photocells of the adjacent linear image sensor respectively. The pixel signals from the consecutive photocells of one linear image sensor are read out, without inserting the pixel signals form the other linear image sensor. The method provides quick video output especially for low-resolution definition.

Abstract: The present invention provides a calibration method and circuit for outputting an average calibration value used in an image-capture apparatus. The calibration circuit comprises difference means accepting a plurality of digital signals from capturing a pixel of a calibration chart. The difference means is for operating each digital signal with subtracting a base value, and whereby filters any aberrant digital signal. Divider means accepts the digital signals for operating each digital signal with dividing a number of scanned times, and whereby prevents an operation of any signal from overflowing. Direct average means accepts the digital signals for summing the digital signals and then divides the number of scanned times, and whereby speeds a calibration operation.

Abstract: In a color digital imaging apparatus, a light source selector is provided for a user to select a proper illumination condition. When down loading the captured image in a computer system, a color correction function is performed at the computer system.

Abstract: An adjustable chassis for variable brightness for a scanner includes a light source, a reflection means, a lens, a charge coupled device and a brightness adjuster. The brightness adjuster may be a reflection mirror adjuster which can change the angle of a first reflection mirror, or a lamp holder adjuster which can change the light emitting angle toward the scanning document, or a light source adjuster which can change the distance between the light source and the scanning document so that brightness on the document may be obtained at an optimum degree to achieve better scanning quality.

Abstract: A back-light module with an improved light projecting assembly for an image scanning device is disclosed. The light projecting assembly includes a light projecting window having two symmetric or asymmetric opposite edges, incorporated with the back-light module. A light guide plate is mounted in the back-light module with a shape corresponding to that of the light projecting window. Two tubular lamps with a shape corresponding to the edges of the light guide plate. Light transmitted from the tubular lamps are guided by the light guide plate for spreading over and projecting from the light guide plate onto a diffusion plate arranged under the light guide plate. The light is further distributed by a diffusion plate and projected to the optical scanning module of the scanner via the light projecting window.

Abstract: A Method to adjust the Ranging of the Modulation Transfer Function, MTF, of a Sensing System, more specifically, it provides for the preparation of a Test Chart of Modulation Transfer Function, of standard specification, and further, for the detection of the Modulation Transfer Function, MTF, for positions differing in picture depths, based on the location and size of said Test Chart, or alternatively on a variation in the thickness of the Crown Glass, whereby the acquisition of an applicable ranging of picture depth is achievable, which in turn provides a method of prompt derivation of a ranging scope of picture depths accommodating easy operation in the course of focal adjustment in workshop production of scanners.

Abstract: An automatic document feeder for an image forming apparatus, such as a scanner, is provided. The automatic document feeder comprises a document-loading means, a document-receiving means, a sheet path, a sheet-transporting mechanism, a scan window, a first sensor means and a second sensor means. The first sensor means is disposed at the entrance of the sheet path and the second sensor means is disposed at a predetermined position along the sheet path. The second sensor means includes a sensor device and a rotatable shaft attached thereto. When the sheet-transporting mechanism transports at least one sheet along the sheet path through the second sensor means, the rotatable shaft is rotated at a predetermined angle.

Abstract: The present invention proposes a method of white plate correction to minimize the width of a reference white plate in an image reading system. The correction method for an image reading system includes the major steps of: providing a reference plate for a reference level correction; reading through the image of the reference plate with line-by-line scanning of a scanning line, the scanning line having a plurality of image sensors arranged inline; picking up at least one peak value of scanned image of each of the image sensors; and correcting each of the image sensors employing corresponding the at least one peak value as a reference level.

Abstract: A circular optical reflection apparatus to be used in an optical image capturing device for receiving light ray from a light source and reflecting the light ray at least twice inside the apparatus then projecting the light ray to a lens set for forming an image on an image forming device. The apparatus includes a cylindrical optical member which has its outside surface coating with a reflective material and has an axial cutaway section to serve as a light inlet and a light outlet. Light ray enters through the light inlet into the cylindrical optical member and reflects inside at least twice then emits out through the light outlet. It may obtain an optical path needed for image forming with less number of reflection mirrors. It is smaller size and may be produced and assembled with less time and cost. It can also eliminate accumulated reflection angle tolerance that might otherwise happen to the conventional ones that use reflection mirrors.