Abstract: The invention is an automatic document feeder (ADF) that includes an opening for feeding paper. The automatic document feeder is used for feeding papers from a paper holder through the opening in the feed direction. The automatic document feeder includes at least an inert-wheel holder, an inert wheel, a transmission shaft, a rolling wheel, and a paper-wiping element. The inert-wheel holder is installed at the opening and includes a holding shaft, an inert-wheel trough, and a paper-wiping trough, where the holding shaft is vertical to the feed direction. The inert wheel, which is installed in the inert-wheel trough, is capable of rolling in the direction of the holding shaft, and the inert wheel has an inert-wheel surface projecting off the inert-wheel trough. The transmission shaft is capable of rolling in the direction of the holding shaft. The rolling wheel is installed on the transmission shaft coaxially, and the rolling wheel has a rolling-wheel surface in contact with the inert-wheel surface.

Abstract: A method of increasing the scanning resolution of a scanner through controlling its driving system. By suitably adjusting the timing relationship between motor pulses and exposure pulses, a low-resolution driving system can produce a high-resolution image with no additional production cost incurred.

Abstract: A document guiding device for a document feeder. The document guiding device mainly comprises an inner wall, an outer wall and a lubricating element. The spatial area between the outer wall and the inner wall form a reversing passageway that accommodates a transiting document. The reversing passageway has a document inlet end and an outlet end both positioned on the same side of the document guiding device. The lubricating element is attached to the interior surface of the outer wall close to the area of contact between the front end of the document and the bend of the outer wall. The lubricating element facilitates the forward movement of the document so that the document is able to travel smoothly from the inlet to the outlet.

Abstract: A method and user interface is provided for use on a computer system coupled with a scanner for performing an automatic scan operation on an original document, with the computer system running a scanner driver and an application program. By the method and user interface, the scanner is first activated to perform a primitive scan operation on the original document based on the default image processing settings to thereby obtain a primitive scanned image. Next, the scanner driver is activated to perform a set of image processing routines on the primitive scanned image to thereby obtain the image qualities of the original document; and based on the image qualities of the original document, a set of suited image processing settings are specified for optimal scan of the original document.

Abstract: A module of reflection mirrors of L-shape according to the invention, arranged in an optical chassis of scanner, is comprised of a first L-shaped mirror and a second L-shaped mirror. The recession portions for the second L-shaped mirror and the first L-shaped mirror are corresponded to each other in the space. After entering the module with a specific angle, an incident light is reflected several times between the two L-shape mirrors before it leaves the module with another angle again. Wherein, there are a first reflection zone and a second reflection zone at the recession portion of the first L-shaped mirror, and there are a third reflection zone and a fourth reflection zone at the recession portion of the second L-shaped mirror.

Abstract: A paper-separating plate is adapted for a paper-separating mechanism having a paper-separating roller. The paper-separating plate placed around a side of the paper-separating roller comprises a main body and a cushion. The main body has a surface and a plurality of grooves and the grooves are positioned on the surface. The cushion is positioned on the surface of the main body and covers the grooves. The cushion positioned over the partial grooves is elastically pressed onto the paper-separating roller. The grooves are linear and the direction of extending the linear grooves is substantially parallel with the axis of the paper-separating roller, the linear grooves neighboring one another or each other. Besides, the cushion is made of flexible material and the main body is made of rigid material.

Abstract: A method and user interface is provided for use on a computer system coupled with a scanner for performing a scan operation on an original document, which allows the user to acquire scanned images in an easier and more user-friendly manner. The method allows the user to scan an original document without requiring the user to have learned knowledge background in the science of image processing, and also allows the scanner to perform only one scan operation on the original document. These features allow the use of the scanner to be easier and more user-friendly than the prior art. By the, method, the first step is to determine a set of image processing settings by a scanner driving program that are suited for optimal scan of the original document; and then the scanner is activated to perform a scan operation on the original document based on the image processing settings to thereby obtain a primitive scanned image.

Abstract: An optical chassis of plating film layer reflection and its manufacturing procedure, the optical chassis includes: a shell body, a light source, plural reflection elements, a lens set, and an imaging apparatus. The reflection elements made of glass material in the prior art are changed to a layer or multi-layer of plating films of reflection material which are directly coated on the inside walls of the shell body of an optical chassis and used as the reflection elements thereof. Also, the shell body is designed as a structure for easy off-die and assembly. Not only the present invention completely gets rid of the prior positioning devices for glass mirrors, such as spring pieces, screws, and the like, but also it decreases the number of parts, saves assembly time and lowers the production cost. And, further it is without lowering the quality of image scanning, which is resulted from no loose or no movement of the reflection elements.

Abstract: A optical device and method for scanner that includes at least a concave mirror, a image device, a stop and a image adjusting module. The concave mirror is with a reflecting surface to focus light and reflect said light to a pre-determined route. The image device can receive the light reflected from at least a concave mirror and convert the light into digital signal. Said stop is on the light traveling route between the image device and at least a concave mirror to reject the extra light. The said image adjusting module is used to adjust the image formed by at least one of the said concave mirrors. The method of adjusting the scanned image will multiply the scanned image by a 2-dimensional enlarging value, said method also cover adjusting the MTF value of the image that near the two ends of the object being scanned.

Abstract: The present invention is a module for increasing total track, especially an application to an optical capturing device, thus the module for increasing total track may change its total track without re-laying out reflection positions and space in said optical capturing device; there are plural kinds of modules to be designed for different total tracks in the present invention, and said modules can be easily and fast substituted in the optical capturing device. The present invention is based on a theory of an incident angle equal to an ejective angle, thus a merge point can be predetermined by an incident light path and an ejective light path; aforesaid phenomenon is not only suitable an one-time reflection, but also plural reflections, and it can be applied in a module with either one reflection element or plural reflection elements.

Abstract: A module of reflection mirrors of L-shape according to the invention, arranged in an optical chassis of scanner, is comprised of a first L-shaped mirror and a second L-shaped mirror. The recession portions for the second L-shaped mirror and the first L-shaped mirror are corresponded to each other in the space. After entering the module with a specific angle, an incident light is reflected several times between the two L-shape mirrors before it leaves the module with another angle again. Wherein, there are a first reflection zone and a second reflection zone at the recession portion of the first L-shaped mirror, and there are a third reflection zone and a fourth reflection zone at the recession portion of the second L-shaped mirror.

Abstract: An optical system device with a concave mirror, applicable for a scanner, comprising at least a curved reflection mirror and an image sensor. The curved reflection mirror is used for reflecting an image from an object to the image sensor. The curved reflection mirror can comprise a concave surface or a convex surface or both. At least a planar reflection mirror is located between the object and the curved reflection mirror, and is used to adjust a reflection angle and a reflection position of the image.

Abstract: An optical chassis pasted with plating film reflection thin plates includes: a shell body, a light source, plural reflection elements, a lens set, and an imaging apparatus. The thin plates of flexible material in lieu of prior glass material constitute the reflection elements. The reflection material is plated on one side surface of the thin plates, and the glue is coated on the other side surface of the thin plates. The thin plates, coated with glue, may be directly pasted onto appropriate positions of an optical chassis as the reflection elements. Not only the present invention completely gets rid of the prior positioning devices, such as spring pieces, screws, and the like, but also it decreases the number of parts, saves assembly time and lowers the production cost. And, further it is without lowering the quality of image scanning, which is resulted from no loose or no movement of the reflection elements.

Abstract: The present invention improves the contrast of the image signal before further adjustment by the principle of superposition of the optical-transferring system. There are two ways to carry out the principle of superposition one is in space domain, the other is in frequency domain. Each of them can be implemented by the system or method of the present invention. To implement the compensation in space domain, the present invention utilize the result of scanning the correction board to compensate the optical energy scattered by the optical-transferring system. A pixel in object space can be expressed in terms of the linear combination of the corresponding pixels in image space according to the principle of superposition. Thus is obtained by extracting the coefficients of the linear combination. The pixels of desired picture in image space is multiplied by the compensation vector and the image with sharp contrast is produced by the present invention in space domain.

Abstract: The present invention provides a color image scanning method of a color image scanner. The scanner comprises three light sources for emitting three different colored lights to illuminate a document to be scanned, and a scanning module for scanning the lights transmitted from the document to generate scanned color image signals of the document.

Abstract: A scanning device is provided which includes a casing for a chassis to be slidably installed therein. The chassis is mounted with a circuit board having a photoelectric transforming element for performing image scanning and a plurality of switching elements for activating the photoelectric transforming element. The switching elements are capable of being cooperative with a plurality of push-keys installed on the casing, at the time the chassis is positioned at a position where the switching elements are in contact with the push-keys, allowing the switching elements to be pressed by the push-keys when the push-keys are pressed by an external force.

Abstract: An improved apparatus for reducing memory usage of look-up table mapping in an imaging system, a method related to the apparatus is also disclosed. The apparatus receives a digital input signal and processes it through a two-step mapping procedures instead of conventional skill that it uses only one look-up table, each procedure provides a series of mapping outputs. A comparing unit composed of a lot of logical gates is then comparing those mappings with original input signal and choosing the best one for preparing a final output. Finally, a final output corresponding to the best choice is providing for displaying.

Abstract: An apparatus for digital correction in an image system is disclosed. The present invention comprises pre-processing means for automatically adjusting dc gain of an image signal; an analogue-to-digital converter for converting the adjusted image signal to a digital signal; bit-enhancing means for generating a bit-enhanced signal; and post-processing means for generating an image code by processing the bit-enhanced signal through highlight, shadow, Gamma and shading correction. The present invention provides an improved apparatus for correcting the photo-response non-uniformity, avoiding image defect, without sacrificing the accuracy of the image system.