Abstract: An image reading apparatus includes a light source unit, an image sensor, and a light guiding unit at least including a light reflector. The light guiding unit may include a first masking shield and a second masking shield. The light source unit irradiates light toward an original. The image sensor picks up an image of the original based on reflected light of the light by the original. The light guiding unit is provided on an opposite side to the light source unit to cause a part of the light to directly enter into the image sensor, when the original is not fed to the image sensor. The light guiding unit reduces light incident to the image sensor, among the light and light having transmitted through the original, at the time of picking up the image of the original by the image sensor.

Abstract: An imaging apparatus includes an image capturing system. A controller is communicatively coupled to the image capturing system. A scanner body has a scanner opening. The image capturing system is located adjacent the scanner opening. A document planar member is positioned across the scanner opening. The document planar member is communicatively coupled to the controller. The document planar member has a transparent state wherein the document planar member is clear and having a translucent state wherein the document planar member is translucent. The controller executes program instructions to control the document planar member to display scan operation related indicia formed by controlling a first portion of the document planar member to be in the transparent state and controlling a second portion of the document planar member to be in the translucent state.

Abstract: The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatus 1 for reading an image on a document 2 being fed and outputting an image signal includes a synchronization signal generation circuit 4 for generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document 2, a CCD 6 for reading an image on the document 2 in synchronism with the synchronization signal SS, an LED 9 for emitting white light, and a lighting control circuit 7 for turning the LED 9 on in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the document 2. The lighting control circuit 7 turns the LED 9 off so that the lighting period of the LED 9 is equal to a predetermined preset period.

Abstract: A light source driving device for driving plural light sources is provided. The light source driving device includes a voltage booster to boost a voltage from a power source to supply the boosted voltage to each of the plural light sources; a constant current driver to regularly hold driving current of each of the plural light sources constant; a load to consume substantially the same power as the plural light sources; and a switch to selectively connect either the load or the plural light sources with the voltage booster and the constant current driver so that the load or the plural light sources are interposed between the voltage booster and the constant current driver.

Abstract: An original size detecting apparatus is capable of carrying out accurate original size detection without erroneous detection of the size of an original due to the influence of external scattered light. A CCD reads reflected light of light irradiated from a light source onto an original placed on an original platen glass. Optical sensors detect two open states of the original presser plate, and a scanner controller performs predetermined control corresponding to each of the open states of the original presser plate detected by the optical sensors, to determine the size of the original based on the result of the reading by the CCD.

Abstract: A light source unit and reader can include a line light source that is attached to a radiator and a rod lens that is attached above the line light source. The radiator with the line light source and the rod lens attached thereto, and a linear strip-shaped reflector arranged in front of the rod lens, are housed in a carriage. The carriage is supported beneath a contact glass and movable in a direction normal to a longitudinal axis of the line light source. The lens has a section in a plane normal to a longitudinal axis of the lens, in which a surface of the lens facing the light source has a curved line that expands or is convexly facing toward the light source. The opposite surface of the lens from the light source has composite curves including a plurality of continuous curves with different radii of curvature. The composite curves are located on both sides of a plane containing the optical axis of the LED and expand or are convex in an opposite direction from the light source.

Abstract: An image reader is provided, which includes a light-emitting-timing setting unit configured to divide a non-light-emitting time during which none of light sources emits light in a predetermined reading period into a plurality of segmental non-light-emitting times and set a light-emitting moment separately for each light source as a moment to emit the light in the predetermined reading period, such that the segmental non-light-emitting times are arranged in a dispersed manner in the predetermined reading period, and a controller configured to control each light source to emit the light during a light-emitting time determined separately for each light source at the light-emitting moment set by the light-emitting-timing setting unit.

Abstract: An apparatus includes a reading unit configured to read an image of a document set on a reading surface, a pressing plate capable of opening and closing relative to the reading surface, and an operation device provided on an upper surface of the pressing plate and including a plurality of capacitance touch switches each having a backlight. A control unit of the apparatus changes states of the backlights according to operation modes.

Abstract: An illumination apparatus includes a light source that generates light used for reading an image and a light guide body which extends in a predetermined direction and onto which the light from the light source is incident. The light guide body includes a pair of first faces that reflect the light so as to cause the light to direct to an image reading region from directions different from one another, a second face which emits the light directing from the first faces toward the image reading region and onto which the light reflected from the image reading region is incident, and a third face which emits the light that is incident from the second face and passes between the pair of first faces.

Abstract: An image reading apparatus includes an array substrate in which a plurality of point light sources is mounted along the main scanning direction, a light guide member disposed on a surface of the array substrate that mounts the plurality of point light sources, and guiding light from the plurality of point light sources to the document surface, a frame for fixing the light guide member and the array substrate, a positioning unit that determines the positional relationship of the frame with the light guide member and the array substrate in a configuration in which the incident surface of the light guide member is in proximity to or in contact with the plurality of point light sources; and an image reading unit that uses reflected light when illuminating light from the plurality of point light sources through the light guide member onto the document surface to thereby read the document image.

Abstract: An image forming apparatus includes a latent image carrier having a surface that moves, an optical writing unit that scans and emits light in a main scanning direction, a developing unit, a first storage unit, a second storage unit, and a control unit. The first storage unit stores first light intensity adjustment data for adjusting the intensity of light emitted from the optical writing unit such that the deviation of the emission intensity of the light in the main scanning direction due to characteristics of the optical writing unit is corrected. The second storage unit stores second light intensity adjustment data which can be set at each irradiation point in the main scanning direction and is for adjusting the intensity of the light emitted from the optical writing unit such that the deviation of image density at an arbitrary irradiation point in the main scanning direction is corrected.

Abstract: A document reading device (1) comprises: a camera (3) for taking an image of an information recorded surface of a passport (P) on which information that can be read through use of light of a predetermined reading wavelength is recorded; an illumination unit (4) for providing illumination of the reading wavelength toward the information recorded surface; an LED (8) for emitting detecting light for the passport (P) from a back of the information recorded surface, the detecting light being of a detecting wavelength different from the reading wavelength; and a control unit (9) for controlling document detection by the camera (3) and light emission by the LED (8). The document reading device (1) detects that the passport (P) is in place based on a brightness level of the detecting light from the LED (8) at the time of imaging. The detecting light emission from the LED (8) is controlled to turn off once the document is successfully detected.

Abstract: A document illuminator comprising a light-transmissive element having nonlinear walls. The walls are shaped in the form of a compound parabolic concentrator with an optically inverted configuration. A diffusive optical source receives light from a side emitting LED embedded therein and redirects it to an aperture along with other light rays that go through total internal reflection from the nonlinear walls. The reflected light rays that are collected at the aperture are in turn transmitted at high power and uniform luminescence to illuminate a document for scanning.

Abstract: An image reading apparatus in which the position of the boundary between an image of an original and a background image, as well as a skew and the size of the image of the original, can be accurately detected even with dust on a line image sensor or on an opposing member opposite to the line image sensor. An image formed on an original is read by a reading unit, and an opposing member is arranged at a position opposite to the reading unit. A plate glass distances the original from the opposing member. Shadow portions of the read image is detected from changes in a sub-scanning direction of pixel data of a read image generated based on output from the reading unit, and boundary coordinate data of the image of the original is obtained.

Abstract: An imaging system that includes a sheet media stack over a recording unit is provided. The imaging system generates image data in response to radiation received from a field of view encompassing sheet media edges of individual media within the sheet media stack. The imaging system detects edges of individual media within the image data.

Abstract: An optical scanning apparatus which includes: a light source unit which emits a light beam; a deflection scanning device which deflects the light beam emitted from the light source unit; an optical scanning unit having a scanning imaging lens and which scans a surface to be scanned; and a light beam detector which detects a position in a sub-scanning direction of the light beam, and is disposed in a position maintaining a correlation, in a time-varying characteristic, between an amount of change of a position in the sub-scanning direction of the light beam on the surface to be scanned and an amount of change of a position in the sub-scanning direction of the light beam detected by the light beam detector, in which a difference between the amount of change of the position in the sub-scanning direction of the light beam on the surface to be scanned and the amount of change of the position in the sub-scanning direction of the light beam detected by the light beam detector is equal to or less than a set value.

Abstract: An image reader is provided, which includes a reference position determining unit configured to, in a state where a bright area and a dark area are formed on a reflection surface when a light projecting unit projects light toward a part of the reflection surface, receive the light reflected from the reflection surface with a light receiving portion of a reading unit while restricting a light emitting portion of the reading unit from emitting light, detect a position of the bright area and a position of the dark area in a main scanning direction, and determine a reference position in the main scanning direction based on the detected positions of the bright area and the dark area.

Abstract: An optical scanner includes: a light reflecting section having light reflectivity; a movable section which includes the light reflecting section and can be displaced; two link sections connected to positions of ends of the movable section, the positions facing each other; a supporting section supporting the link sections; and a displacement providing section turning the two link sections, wherein each link section includes a turnable drive section, and a shaft section connecting the movable section and the drive section and bending in a thickness direction of the movable section by turning of the drive section.

Abstract: An image processing apparatus including, a light source for reading for applying light onto an original to read, a light source for erasing for applying light of specific wavelength onto the original to decolorize image area, having been printed with color-changing agent having characteristic to become colorless by the light, a reading section for receiving reflected light from the original, an output section for outputting image data of the original, and a control section configured to compare first image data obtained by applying light from the light source for reading to the original, and second image data obtained by applying light from the light source for reading again to the original after applying light from the light source for erasing to the original, to determine whether the agent has been used in the image, and control at least either the reading operation or the output operation based on that determination.

Abstract: A scanning apparatus for transparent documents includes a scanner which includes a host and a lid pivotally coupled with the host, and a transparent document holding module which is located between the host and the lid, and includes a main body and a light guide element which is located on the periphery of the main body. The host has an optical module for scanning. The optical module includes a plurality of lighting units and a first attraction element. The main body aims to hold a transparent document. The light guide element includes a second attraction element attracted to the first attraction element. When the light guide element is moved with the optical module, the direction of light projecting to the transparent document is altered. Thus when the light guide element is moved with the optical module along a track, scanning of images on the transparent documents can also be accomplished.

Abstract: An image reading apparatus includes an illuminating optical system having light sources arranged in a line and a light guide member guiding rays of light from the light sources to illuminate a document which passes through a document reading position near a light emergent surface of the light guide member. An image reading optical system includes a rod lens array to read light passing through the document, and a cylindrical lens array in the light emergent surface of the light guide member. Ridge lines running along a subscanning direction on the light guide member are aligned in a scanning direction.

Abstract: A light-source drive control unit divides each pixel of the image data into a plurality of subpixels, deletes certain subpixels from the image data in accordance with predetermined correction data, shifts remaining subpixels in the sub-scanning direction thereby obtaining reduced image data, and controls a plurality of light sources based on the reduced image data in such a manner that one line of the subpixels is formed with a light beam emitted from a corresponding one of the light sources.

Abstract: A circuit module integrating a light driver and an optical scanner is capable of sensing an image of a document and driving a light source. The circuit module comprises a printed circuit board, an optical sensor and a light driver. Both the optical sensor and the light driver are mounted on and electrically connected with the printed circuit board. The optical sensor is capable of sensing the image and the light driver is capable of driving the light source.

Abstract: A rod-shaped light guide reflects light incident on an end face thereof in the interior of the rod-shaped light guide and emits the light outside from a light emitting surface provided to extend in the longitudinal direction. The rod-shaped light guide includes: a scattering pattern surface provided to be opposite to the light emitting surface and operative to scatter the light incident on the end face; first and second lateral surfaces provided between the light emitting surface and the scattering pattern surface; and first and second projections provided to project from the first and second lateral surfaces, respectively, capture the light reflected by the light emitting surface, reflects the light toward the light emitting surface, and causes the light to be emitted outside from the light emitting surface.

Abstract: An image reading apparatus that detects failure in the white LEDs constituting a white LED array. Failure in the white LEDs is detected by comparison between a prescribed current threshold and the current running in the LED array detected by an image reading apparatus controller when the white LED array composed of plural LED blocks connected in parallel, each LED block being composed of plural LEDs connected in series, is powered for failure detection. This failure check is conducted by checking LEDs for failure in each of the LED blocks constituting the LED array. Image reading is not permitted when faulty LEDs are detected in two neighboring LED blocks.

Abstract: A scanning apparatus includes a scanning module. The scanning module includes plural light emitting diodes, a porous reflective plate with plural openings, and a reflective element. When the scanning apparatus starts scanning a document, the light beams emitted by the light emitting diodes are directed to the porous reflective plate. A portion of light beams reflected by the porous reflective plate are defined as reflected light beams. The light beams penetrating through the openings are diffracted to be diffractive penetrated light beams. The reflected light beams reflected by the reflective element and the diffractive penetrated light beams are projected on the document, so that enhanced uniform illumination efficacy is achieved.

Abstract: An image scanner includes a light-pervious supporting plate, an enclosure, an image sensor, several light sources, and two or four light guide plates. The supporting plate supports an original to be scanned. The enclosure and the supporting plate cooperatively define a receiving space. The image sensor is received in the receiving space, and has a receiving surface. The two, four, or six light sources emit light. The light guide plates each include a light incident surface and an output surface. The light incident surface is configured for receiving light from the respective light sources. The output surface is configured for emission of surface light to scan the original on the supporting plate. In this manner, the surface light is reflected by the original to the receiving surface of the image sensor, thus an image of the original is captured.

Abstract: A compact image reading device is provided in which a plurality of illumination devices are not needed, and by which a hologram image can be accurately identified in a short period.

Abstract: A method for measuring a deviation in timing of start of writing in scanning lines is implemented by an optical scanning device that scans a surface to be scanned with light beams from light-emitting elements having first and second light-emitting elements which are arranged so as to be displaced from each other in a direction corresponding to a direction of the scanning lines. The method includes: detecting timing at which light from the first light-emitting element is received by a light receiving element, as a first time, the light receiving element outputting a synchronization detecting signal before start of writing; detecting timing at which light from the second light-emitting element is received by the light receiving element, as a second time; and obtaining the deviation in timing for the second light-emitting element with respect to the first light-emitting element based on a difference between the first and second time.

Abstract: A method for scanning an object is provided. The method involves placing the object on a scanning platform. The scanner has a plurality of cameras positioned around the object to be scanned. The scanned object can be a foot, among other things, and the scanner is positioned at a predetermined incline so that the foot is evenly supported. A positioning system including at least one sensor is used to determine if the foot is located within a predetermined scanning area. The method can be used to measure foot dimensions for the production of shoe lasts and construction of shoes. The method can be used in a system for selecting shoes that properly fit.

Abstract: An image sensor includes a light source; a bar-shaped light-guiding element having a first light-emitting section, which propagates light from the light source and irradiates an document from an oblique direction, and a second light-emitting section emitting light in a carrying direction of the document; a lens converging the light reflected from the document; a sensor receiving the light passed through the lens; a reflector disposed on the opposite side of the light-guiding element, by reflecting the light from the second light-emitting section such that an optical path of the light emitted from the second light-emitting section is located between the lens and the document, and irradiating the document from an oblique direction; and first and second light-scattering layers formed in areas opposed to the first and the second light-emitting sections, respectively, in the light-guiding element.

Abstract: An illumination module is provided in the invention. The illumination module includes a light source having a plurality of light emitting elements arranged in a linear array and a light guide device. The light guide device receives light from the light source and generates uniform light which is transmitted onto an article to be scanned, has a longitudinal direction, and includes a diffraction structure and a reflection portion. The diffraction structure has a shape inducing light to be scattered and deflects the scattered light toward the longitudinal direction. The reflection portion reflects the light scattered and deflected by the diffraction structure, and is inclined to have an inclined angle with the light propagating direction. In addition, the reflection portion is formed on the diffraction structure or apart from it.

Abstract: Disclosed are a scanner module and an image scanning apparatus employing the same. The scanner module includes a light source generating light to be irradiated onto an object and a light guide member extending in correspondence with a width of the object such that the light source is installed on the light guide member. The light guide member has a reflective surface for reflecting the light generated from the light source, an exit surface for radiating the light, which is reflected from the reflective surface, toward the object, and a plurality of guide surfaces that guide the light toward the exit surface by totally reflecting the light when a traveling direction of the light reflected from the reflective surface deviates from the exit surface.

Abstract: In the so-called sky-shot in which reading is performed with a platen cover (32) open, an output signal of a read image is compared with a white reference value generated from a white reference member (40). Only if a value greater than or equal to the white reference value exists in the output signal of the read image, a reading operation to be performed with a light source unit in an image sensor unit (33) turned off during an original (34) reading operation is added to each scan line reading operation.

Abstract: An image capturing device includes: a first base, including a first side edge and a second side edge opposite to each other; a first light-emitting element, located at the first side edge, for emitting a first light source to illuminate a document; a first compensator, located at the second side edge; a first sensing element, located between the first light-emitting element and the first compensator; a first transparent sheet, covering the first compensator; a second base, including a third side edge and a fourth side edge opposite to each other; a second light-emitting element, located at the third side edge, for emitting a second light source to illuminate the document; a second compensator, located at the fourth side edge; a second sensing element, located between the second light-emitting element and the second compensator; and a second transparent sheet, covering the second compensator.

Abstract: A method includes reading an image of a document obtained by a reading unit exposing the document to light with an exposure unit, causing the reading unit to perform first reading processing for reading first information obtained by causing the exposure unit to perform exposure with a first light amount, and second reading processing for reading second information obtained by causing the exposure unit to perform exposure with a second light amount that is smaller than the first light amount while no document is placed at a reading position of the reading unit, and detecting a foreign matter existing at the reading position according to a difference between the first and second information.

Abstract: An image scanning apparatus and method. The image scanning apparatus which scans an image of document includes a light source including at least three light emitting elements of red, green, and blue, which are sequentially lit up at intervals of a first time, a light emitting time control unit to control a light emitting time of the at least three light emitting elements such that the first time is shorter than a second time by a predetermined value, a sensor array to transform an image formed by light reflected from the document into an electric signal according to results of the control of the light emitting time and the light intensity, and an output unit to output image data corresponding to the transformed electric signal.

Abstract: A contact-type image scanner includes an illumination unit, a control unit and a photo-sensing unit. The illumination unit includes a first, a second and a third light source for respectively emitting different color light beams on an original surface. The control unit is in communication with the illumination unit for controlling on durations of the light sources. In response to a first start pulse and a second start pulse, the first light source and the second light source are turned on for a first on duration and a second on duration respectively, wherein the second light source is turned on immediately after the first light source is turned off or after the first light source is turned off for a delaying time. In response to a third start pulse, the first, second and third light sources are simultaneously turned on for a first minor on duration, a second minor on duration and a third minor on duration, respectively.

Abstract: According to aspects of the embodiments, there is provided methods and systems for correcting illumination defects in document handlers. A document handler successively moves an image-bearing sheet past an image sensor, when the edges of the document passes over the edge guide near a constant velocity transport roll the document tends to flick down onto the image sensor causing a lightness change at the edges. The proposed correction is dynamically adjusting the light source or dynamically adjusting the automatic gain control (AGC) of the imaging sensor. The method comprises characterizing an optical signal reflected from an image-bearing sheet as it passes a scan window, determining the illumination defects in at least one edge region based on the reflected signal, and adjusting the gain of the imaging sensor or the light level during receipt of the optical signal.

Abstract: The image scanning apparatus includes a light source including at least one light emitting diode (LED) to irradiate light to a document which is a scan target, a light source control unit to control a lighting-up point of time of the light source, an image sensor to transform an image formed by light reflected from the document into an electric signal according to a result of controlling the lighting-up point of time, and an output unit to output image data corresponding to the transformed electric signal.

Abstract: An original-document illumination apparatus includes an illuminated face on which an original-document is placed. The original-document illumination apparatus also includes a light-source unit having a plurality of light-emitting elements which are arranged along the main-scanning direction of the original-document and which illuminate the original-document. The light source unit is movable in a sub-scanning direction that is orthogonal to the main-scanning direction. In addition, the original-document illumination apparatus includes a lens array disposed between the illuminated face and the light-source unit, and having a plurality of convergent lenses. A luminous flux from each of the light-emitting elements of the light-source unit is radiated onto the illuminated face through each of the lenses of the lens array.

Abstract: Disclosed is an exposure head including a light emitting element array including light emitting elements disposed in a first direction, a light blocking member including an aperture stop through which lights emitted from the light emitting elements pass, and an image forming optical system that makes an image by using the lights having passed through the light blocking member. An absolute value of a magnification in the first direction of the image forming optical system is equal to or more than 0.7 times and is equal to or less than 0.8 times.

Abstract: A system for imaging a document including an imaging apparatus, which includes a camera positioned inside the imaging apparatus, the camera configured to acquire a plurality of images of a document in front of the camera. The document is place behind a glass window on a wall opposing the camera. The imaging apparatus includes an illumination system which is positioned around the glass window but outside the field of view (FOV) of the camera. The imaging apparatus further includes an opaque cover, which covers the whole glass window area. The cover includes a slit to insert a document to be imaged, a slit to remove the document and a groove that enables a user to move the document with his finger.

Abstract: An image sensor includes an elongated case, a light source provided in the case, a light guiding member elongated in a longitudinal direction of the case and configured to direct light emitted from the light source toward a document to be read, an optical system for collecting light reflected by the document, a sensor IC chip for receiving the light collected by the optical system, and a substrate attached to the case. The substrate is provided with a wiring pattern and carries the sensor IC chip. The case is provided with a plurality of supporting projections spaced apart from each other in the longitudinal direction. The supporting projections are held in contact with the side surface of the light guiding member.

Abstract: A method of calibrating a test chart is provided. First, a reference scanning device scans a reference test chart to obtain a plurality of reference optical density (OD) values. The reference test chart includes a plurality of reference blocks. Then, the reference scanning device scans a test chart to obtain a plurality of first OD values. The test chart includes a plurality of blocks, which corresponds to the reference blocks. Next, a compensation function derived from respectively converting the first OD values into the reference OD values is obtained.

Abstract: In one embodiment, an image reading apparatus has a light source configured with a plurality of light-emitting elements disposed in a row in a main scanning direction that irradiate light toward an original, and a photoelectric conversion element that receives light reflected from the original, an output light amount from the light-emitting elements can be adjusted, and a state of bright spots due to repetition of light-dark in the main scanning direction on a light irradiation face of the original due to the plurality of light-emitting elements is determined, and the output light amount from the light-emitting elements is adjusted based on the determination result of the state of the bright spots.

Abstract: An image reading apparatus includes light emitting elements, a circuit board, a light guide member, a support member and a heat radiation member and a reading portion. The light emitting elements emit light for illuminating an original. The light emitting elements are installed on the circuit board. The light of the light emitting elements enters into the light guide member. The support member supports the circuit board and the light guide member. The heat radiation member has a heat transmission portion to which heat generated in the light emitting elements is transmitted, and a heat radiation portion that radiates the heat conducted to the heat transmission portion. The reading portion reads an image of the original with reflection light generated in such a way that the light exiting from the light guide member is reflected from the original.

Abstract: An image reading apparatus, which reads an image on an original, including: a light source extending along a main scanning direction to illuminate the original; a plurality of line sensors configured to receive light reflected from the original and to output light intensity signals; a storage unit configured to store reference data; and a determination unit configured to obtain determination data regarding hue based on a light intensity signal output from one of the plurality of line sensors that receive light reflected from a reflective reference member illuminated by the light source and a light intensity signal output from another of the plurality of line sensors that receive light reflected from the reflective reference member illuminated by the light source and to determine a hue balance of the light source based on the determination data and the reference data stored in the storage unit.

Abstract: The present invention is about an apparatus for scanning an object. The apparatus comprises an image capture module having a lens and a sensors array for capturing light after scanning the object. There are light sources comprising a visible light source and an infrared light source. Next, a key module of the present invention is a first translation module connected with the lens and the sensors array. The first translation module is-used for changing a first location of the lens and a second location of the sensors array according to using different the light sources so as to improve some optical characteristics, such as aberration resulting from different wavelengths of light sources. A power module connects with the first translation module and the light sources for supporting energy to the first translation module and the light sources. Moreover, a second translation module connects with the light sources and the image capture module, and the second translation driven by the power module.

Abstract: A changeable resolution apparatus and method for scanner includes two rotational disks which have respectively a plurality of lenses of different focuses and a plurality of charge-coupled devices (CCD) of different resolutions located therein. A motor is provided to drive a transmission shaft to rotate in a positive or a reverse direction. Two one-way shaft bearings are engaged with the transmission shaft to drive the rotational disks one-way in opposite directions for changing lens and CCD combination to reach different resolutions. The apparatus is located in the scanner for users to adjust scanner resolution based on scanning requirements to get optimum resolution result.