Abstract: An image formation apparatus capable of scanning using an optical scanning unit in both directions of a sub-scanning operation, performing a predetermined image processing on the information read by a CCD, and subsequently storing in a page memory. CPU controls address count of the main scanning address counter and sub-scanning address counter to prevent the image whose output image to the printer is in the reversing direction becomes a mirror image. Accordingly, it is possible to provide an image formation apparatus capable of outputting an appropriate image signal regardless of the direction in the sub-scanning direction of the optical scanning unit, and processing successive duplication at a high speed.

Abstract: The present invention is directed to a hand-held scanning device in which the scanning device housing window is attached directly to the optical assembly. In this manner, alignment between the window and the optical assembly may be maintained even when the housing is being subjected to stress. The window is also designed to float with respect to at least a portion of the housing, thus allowing the housing to flex without causing movement of the window relative to the optical assembly. A tortuous path seal arrangement may be provided between the window and the housing. The tortuous path seal allows the housing to move relatively to the window, and yet inhibits the entry of dust and other contaminants into the interior of the housing through the space provided between the window and the housing.

Abstract: An image reader apparatus includes an illuminating element to illuminate a document face to be read, an optical element to form an image of the document face illuminated by the illuminating element, an image sensor to photoelectrically convert the image formed by light passing through the optical element, and a running roller rotating in contact with the document face, wherein a horizontal distance between a document contact portion of the running roller where the running roller contacts the document and a center of imaging of the optical element is shorter than or equal to 10 mm.

Abstract: An image reader for facsimile machines etc. includes an image sensor, a platen movable to and from the image sensor and having an end, and a locking mechanism capable of holding the platen in a state pressed against the image sensor. The locking mechanism includes a platen support for rotatably supporting the end of the platen, and a rotatable support supporting the platen support so that the platen is allowed to move to and from the image sensor, the rotatable support disallowing the platen to move to and from the image sensor so that the platen is held in the state pressed against the image sensor, when the platen support is rotatively moved in a predetermined direction.

Abstract: A lamp power supply circuit for an image forming device, which is not provided with a full-wave rectifier and any additional noise reducing circuit but is capable of effectively suppressing inrush current not to produce noise that may cause erroneous operation of the image forming device and affect any external appliance. A lamp lighting control system for use in an image forming device, which can realize soft-starting of an exposure lamp or a fixing heater-lamp by gradually increasing a conducting angle .beta..sub.i (i=0, 1 . . . ) for applying a voltage to a lamp through phase control of an AC power-supply voltage V.sub.AC for an initial period of energizing the exposure lamp or the fixing heater-lamp. Wherein, the conducting angle is gradually increased per even-number unit of cycles of AC power-supply voltage V.sub.AC on the condition that even numbers of cycles in the same unit have the same conducting angle, e.g., .beta..sub.0 =.beta..sub.1 <.beta..sub.2 =.beta..sub.3 <.beta..sub.4 =.beta..sub.

Abstract: A coded data output apparatus comprises an image data input or generation section, a resolution parameter specifying section, a resolution parameter modifying section and an image data output section. The image data input or generation section inputs or generates data for a dot code image to be printed. The resolution parameter specifying section specifies parameter data relating to the resolution of the image data input or generated by the image data input or generation section. The resolution parameter modifying section modifies the parameter data relating to the resolution specified by the resolution parameter specifying section according to the characteristic specific to the applied plate making apparatus. The image data output section outputs the input or generated image data according to the parameter data relating to the resolution and modified by the resolution parameter modifying section.

Abstract: An electrical device comprising an array of pixels has a plurality of panels 10, 20, 30, each having a respective sub-array of pixels 11. Each panel 10, 20, 30 is associated with an array 40 of lens elements 42, which may be associated with a group of one or more pixels of the sub-array. The lens elements 42 are arranged with a pitch which is greater than the pitch of the associated group of pixels, so that a diverging image is produced, enabling tiling of panels of an image sensor or of a display device.

Abstract: To obtain an index print prepared by effectively utilizing photographic paper, magnetic information is read in accordance with feed of a negative film (202, 204), and a relevant index format is selected according to a number of photograph frames of the negative film to determine an index print size corresponding to the selected index format (206, 208). Next, each frame is subjected to exposure processing to accumulate image data respondent to the index format (210). Upon completion of the exposure processing of the negative film, the accumulated image data are read (212) to conduct index printing by using the read image data to cut in accordance with the index print size (214, 216). Accordingly, an index print is produced in a size respondent to a number of frames.

Abstract: A stabilized frequency oscillating circuit outputs a pixel clock signal to an image scanner for controlling pixel rate at various writing positions along a scan line. The circuit includes a synchronization circuit having a first control signal component output to adjust a nominal output frequency of the oscillator; and a frequency profiling circuit having a second control signal component output which varies as a function of writing position along the scan line to determine a corrected output frequency of the oscillator which varies as a function of writing position along the scan line.

Abstract: First and second patterns are located outside of an image reading area. A first pattern comprises a plurality of lines each extending at a fixed angle with respect to a sub-scan direction. A second pattern comprises a plurality of lines each extending at a fixed angle but having a reverse direction with respect to the sub-scan direction. An image reading portion reads the first and second patterns. A position error measuring portion measures first and second image reading position errors corresponding to different angle oblique lines of the first and second patterns of image data obtained as a result of reading the first and second patterns, respectively. The position error measuring portion compensates for position deviations of the first and second patterns using the first and second image reading position errors, and obtains position-deviation-compensated image reading position errors.

Abstract: In a digital full color copying machine, one pixel on a photoconductor is divided into four subdivided small pixels. Functions a-d are assigned to each subdivided small pixel. Functions a-d are linear functions with density data as a parameter. The slope of functions a-d becomes smaller in sequential order. Exposure data of the four subdivided small pixels is calculated according to the density data of a pixel and functions a-d to expose each subdivided small pixel. A peak can be established in the exposure amount distribution to form a deeper latent image. Accordingly, resolution and graininess of the halftone area are improved.

Abstract: An image reading and recording apparatus includes a reading section for optically reading an image for output of image signals, and a recording section for generating and controlling a light beam to record the read image on the basis of the image signals. The apparatus further includes a light sensor for detecting the light beam at a predetermined position and for generating a record timing signal which determines start timing for control of the optical beam, a counter for determining lapse of a predetermined time since the generation of the record timing signal, and a read timing signal generator for generating, upon the lapse of the predetermined time, a read timing signal which determines timing for output of the image signals from the reading section.

Abstract: A photographing operation control device having an electro-developing recording medium to electronically develop an image formed thereon. The developing or photographing operation of the electro-developing recording medium is performed during a period when a recording medium activating signal is outputted. An exposure period for which the electro-developing recording medium is exposed is set based on a measured photometry value. When the exposure period is longer than a standard period for which the recording medium activating signal is outputted, the recording signal activating signal is outputted as pulse signals for a period equal to the exposure period. The operation period for which the pulse signals are outputted is set in such a manner that a total amount of the output period of the recording medium activating signal is equal to the standard period.

Abstract: A compact color image reader for scanning an image in a short time is disclosed. The color image reader includes three fluorescent lamps 17 of red, green, and blue, a lighting circuit 15 for lighting the three fluorescent lamps sequentially, a CCD 183 for reading an image illuminated by the three fluorescent lamps and a control circuit 16 for controlling a lighting period of each of the fluorescent lamps 17 and the reading of the CCD. In order to perform the scanning of a color image in a short time, the lighting circuit 15 lights each of the three fluorescent lamps at a lamp current higher than a rated value and the CCD performs the fast reading in a period corresponding to the lighting period.

Abstract: The compact document imager and display apparatus has a two-dimensional image sensor array, a flat panel display such as a liquid crystal display (LCD), and processing electronics. An illumination source can be added to illuminate the document on the sensor array and to provide backlight for the LCD. Color imaging may be achieved by providing three sequential illumination pulses of appropriate colors. A document is placed in close contact with the sensor array. The document is illuminated and an electronic image is captured and stored in the processing electronics. The captured image can be displayed on the LCD by the processing electronics. The document, such as a single sheet of paper or a transparency, can be illuminated by the room light to perform image capture. The compact document imager can be used as a facsimile machines by providing telephone connections. Documents can be scanned using the sensor array and sent to other devices. Documents can be received from other sources and displayed on the LCD.

Abstract: An image reader includes guide plates for defining an original convey path, a conveying mechanism for conveying an original along the original convey path, an optical reading section for illuminating the original fed by the conveying mechanism and for reading image information on the basis of reflection light from the original, and a mounting member for mounting the conveying mechanism and the optical reading section on the guide plate. In particular, the guide plate has a plurality of openings arranged in a direction of original conveyance, the conveying mechanism has a plurality of rollers protruding into the original convey path through the openings, for rotating to convey the original, and the mounting member has a plurality of supporting portions disposed beside the openings, for rotatably supporting the rollers.

Abstract: A reading unit provided with an optical system mounted on a recording apparatus to read a source document includes a housing having the optical system in it, a light transmitting portion arranged on the outer surface of the housing of the reading unit in order to guide the light outside the reading unit into the optical system of the reading unit, and a protection member to cover the outer side of the light transmitting portion for opening and closing such portion freely. With the structure thus arranged, the reading unit is protected from ink mist and other particles created by the recording apparatus that may contaminate the reading unit, hence preventing the accuracy of reading signals from being lowered when reading is performed by means of this reading unit.

Abstract: An image sensor has a case, a glass cover attached to its upper surface, a head plate carrying a plurality of image sensor chips, a plurality of light-emitting elements for illuminating a document placed on the glass cover and a rod lens array for focusing the reflected light from the document on the image sensor chips, and a light-conducting member which is placed inside the case for effectively directing the light from the light-emitting elements to a specified area of the glass cover. The upper surface of the rod lens array at both its ends is compressed by compressing members formed at both end parts of the light-conducting member. The rod lens array is inserted from above into a holder having a groove formed inside the case. The holder may have protrusions formed for engaging with an edge on the upper surface of the rod lens array approximately in the middle in the longitudinal direction for easy attachment.

Abstract: An original reading apparatus includes a light source for illuminating an original, and a light receiver to receive light reflected from the original, the light receiver having a plurality of light receiving elements each for outputting an electric signal in accordance with an amount of received light. Output values of the light receiving elements are corrected corresponding to pixels on the original.

Abstract: An image reading apparatus which reads document surfaces of open book-like documents placed on a document platen in a face upward condition, the image reading apparatus comprises; a first detector which detects a height distribution of a document surface in a main scanning direction, a second detector which detects a height distribution of the document surface in a sub-scanning direction, and a direction discrimination device for discriminating whether a placement direction of the document is a main scanning direction or a sub-scanning direction based on the height distributions.

Abstract: An optical read sensor includes a circuit board having light-emitting elements mounted thereon, a transparent cover on which an original to be read is placed, light-receiving elements, and a light-guide that guides the light reflected by the original to the light-receiving elements. The light-emitting elements emit light toward the original. The original reflects the light emitted from the light-emitting elements through the transparent cover. The light guide guides the light reflected by the original to the light-receiving elements.

Abstract: An image sensor and a facsimile apparatus incorporating the same. A sponge piece is attached to a substrate with a light receiving device attached thereto. The sponge piece is brought into contact with an inclined inner wall surface of the frame when the substrate is mounted on the frame. The sponge piece thus urges the substrate in the vertical direction and sideways, thereby fixing the substrate at a predetermined position. Since the light receiving device is prevented from any deviation in the horizontal and vertical direction, a good picture quality is obtained.

Abstract: An image pickup device having a solid-state image pickup element, and a memory for storing a signal read from said solid-state image pickup element, in which there are provided first and second clock pulse generation circuits for generating the clock pulse having respective predetermined frequencies, and a switch circuit for switching the clock pulse depending on whether said solid-state image pickup element is operating or not, is characterized in that when said solid-state image pickup element is operating, the processing pulse for each portion is generated based on the clock pulse generated in either one of said first and second clock pulse generation circuits, and when said solid-state image pickup element is not operating, the processing pulse for each portion is generated based on the clock pulse generated in the other clock pulse generation circuit.

Abstract: A scanner frame comprises a vertical track which is slidably attached at one end thereof to a horizontal track. The horizontal track is attached to a drawing board or any other suitable flat surface. An optical imaging device (i.e., an optical scanner) is slidably attached to the vertical track. A marker strip comprising a series of bars of uniform pitch are disposed on a surface of the horizontal track along the length thereof. These bars are detected by a sensor assembly disposed on the vertical track. Another marker strip comprising a series of bars of uniform pitch are disposed on a surface of the vertical track along the length thereof. These bars are detected by a sensor assembly disposed on the scanner. During use, a drawing to be scanned is secured on a board, the vertical track is positioned at the left-most position and the scanner is positioned at the upper end of the vertical track.

Abstract: A scanner interface device of video system used with a scanner scanning a scanned object to obtain a scanned signal includes a scanner interface receiving the scanned signal outputted by the scanner and transforming the scanned signal into a preliminary video signal, a converter electrically connected to the scanner interface for transforming the preliminary video signal into a secondary video signal complying with a specific video system format, and a control unit electrically connected to the scanner interface and the converter for controlling the scanner interface device. The present invention is easy to operate and appropriate for use in families, can be used more diversely, and stores more data with less expense.

Abstract: An electrophotographic printing or copying machine contains as image source a laser diode array (10) having a multiplicity of individually excitable laser diodes (11) which are arranged thereon in a predetermined grid for forming an excitation pattern. Furthermore, a deflection unit (13) deflecting the light beams from the laser diode array (10) and imaging optics which are arranged between laser diode array (10) and photoconductor (17) and are configured in such a way that they image the excitation pattern of the image source optically and free of distortion on the photoconductor (17) as an image point pattern.

Abstract: A contact image sensor assembly for use in a facsimile comprises a scan roller and a contact image sensor to allow a manuscript to be passed therebetween during the rotation of the scan roller. The scan roller is rotatably mounted to a pair of side brackets having a slit, respectively, the slit having a roller fixing groove and a bent groove upwardly bent. A screw consists of a fastening portion fastened to a tap hole of the contact image sensor and an axle inserted into the slit. During the rotation of the scan roller, the axle of the screw is upwardly shifted along the bent groove while the contact image sensor is leftwardly biased by two springs, thereby automatically aligning with a desired scan point of the contact image sensor.

Abstract: An image reading apparatus for approximately obtaining an image signal which might have been obtained if scanned in a second direction using an image signal obtained by scanning in a first direction. The image apparatus includes a conveyer for conveying a document, a detector for detecting the inclination of the conveyed document, and a window generator for generating a window signal. Also included is an image reader for reading an image by scanning the document in a first direction at a width broader than the width of the document and reading the scanned image only when the window signal is present to produce an issuing image signal. Also included is a first corrector for adjusting the start timing of the window signal so that the window signal may be started when the scanning passes through the beginning end of the document by reference to the inclination angle of the document.

Abstract: An image input equipment including a stage having a diffusion board provided on an upper surface thereof on which an object is to be placed, an image input head for inputting an image of the object and photoelectrically converting the image into an electric signal, a supporting pillar for supporting the image input head and positioning the image input head over the stage, exterior illumination lamps for illuminating the object placed on the stage from above the stage, interior illumination lamps for illuminating the object placed on the diffusion board from inside the diffusion board. The image input equipment is further provided with lighting circuits and a changeover device. The lighting circuits are used to activate both the exterior illumination lamps and the interior illumination lamps. The changeover device connects the lighting circuits to only either the exterior illumination lamps or the interior illumination lamps selectively.

Abstract: The disclose is intended to miniaturize the actuator of an image shifting mechanism, to operate the actuator at high speed, and to reduce the effect of image shifting on image resolution. In an image shifting mechanism, a pair of bimorph type piezoelectric elements are disposed on both sides of a refraction plate. The bimorph type piezoelectric elements have a cantilever structure. The base end sides of the bimorph type piezoelectric elements are bonded and secured to a stage, and the free end sides are sandwiched between an upper holding plate and a lower holding plate so as to support one end of the refraction plate. When the bimorph type piezoelectric elements are displaced, the refraction plate can be inclined around its rotation center O.

Abstract: To obtain an index print prepared by effectively utilizing photographic paper, magnetic information is read in accordance with feed of a negative film (202, 204), and a relevant index format is selected according to a number of photograph frames of the negative film to determine an index print size corresponding to the selected index format (206, 208). Next, each frame is subjected to exposure processing to accumulate image data respondent to the index format (210). Upon completion of the exposure processing of the negative film, the accumulated image data are read (212) to conduct index printing by using the read image data to cut in accordance with the index print size (214, 216). Accordingly, an index print is produced in a size respondent to a number of frames.

Abstract: An image reading apparatus is for reading a document such as a book from above with the target faces thereof placed upwardly. The apparatus allows for correction of distortions of the image, without relying on the background color of the target faces of the document. An image processing device detects the boundary between the document and a document-guiding device (the document edge) on the basis of the image read by the image reading device and corrects distortions of the image with reference to the detected boundary.

Abstract: A portable apparatus for reproducing individual pages of a bound document without optical distortion or damage to the bound document, including a substantially flat sensor array which may be inserted between pages of a book. Sensors scan one or both opposed pages. Alternatively, the sensor array surfaces may be set at an angle, also creating a reproduction apparatus capable of insertion between pages of a bound document.

Abstract: An image communication apparatus has a read unit for reading a document sheet image and a battery power supply. The read unit has a voltage conversion unit for converting power supplied directly from the battery power supply. Other units, such as a recording head and a motor drive unit, may also receive power directly from the battery. A modified thermal head design is used to provide response equal to that obtainable with a higher-voltage supply.

Abstract: Provided is an image sensing apparatus in which it is possible to use an optical system having a large aperture and an image sensing system such as an image sensing element in an image sensing cartridge docked with a portable image device. The image sensing apparatus includes a portable information device and an image sensing cartridge, which has at least an image sensing system, capable of being loaded in and unloaded from the information device. An image sensing operation becomes possible by docking the information device and the image sensing cartridge. The image sensing cartridge has an opening, which is for introducing light to the image sensing system, the aperture of which is designed to be larger than the shortest portion of an insertion port, which is provided in the information device, for inserting the image sensing cartridge.

Abstract: An image reading device having a substrate, an array of a plurality of photoelectric conversion elements arranged on the substrate in a main scanning direction, and a plurality of light emission sources arranged in the main scanning direction to emit light for illumination of an original through light transmission windows formed at one side of the photoelectric conversion element array in a sub scanning direction. A shading portion is provided on the photoelectric conversion element side in each light transmission window corresponding to one of the plurality of photoelectric conversion elements to section the light transmission window into a plurality of light transmission regions at least on the photoelectric conversion element side. This image reading device is thus arranged to provide uniform output from the photoelectric conversion elements at the time of reading a black original.

Abstract: A system for communicating between a plurality of human individuals communicates first information from a first individual to a second individual through a telephone line to thereby direct that a product be produced at a remote location. Second information is written in a personal stylized script onto an information receiving medium to produce a first note page. The first note page is then digitized and transferred from a first location to a second location. The digitally formatted first note page is then received and reformulated at a second location. An exterior box is located at the second location and has upper, lower, front, back and sidewall panels forming a rectangular shaped box having an open front. An open top vase is received and fastened within the box. A receiving frame on the box then receives the second note page for shipment to a final destination.

Abstract: A spatial light modulator assembly is disclosed which adapts a conventional photographic printer to generate photographic images from electronic image signal such as that created by an electronic still image camera. The spatial light modulator assembly comprises a spatial light modulator ("SLIM") which is connected to a computer for imprinting electronic image signal thereon where the electronic image signal is communicated from the computer. The SLM is secured within an adapter which is formed to fit in a negative carrier of the photographic printer such that an image imprinted on the SLM is positioned over a light source thereby projecting the image onto photographic paper held within the conventional photographic printer.

Abstract: A data converting device for converting data by employing a plurality of LUTs stored in a single memory device. The device generates, with reference to two or more LUTs sequentially, a converted output data corresponding to input data and converting level selected by each LUT. The data converting device has a single memory device for storing two or more LUTs corresponding to the number of data converting modes by block units, each block including a plurality of sub-LUTs corresponding to the number of converting levels defined in each corresponding converting mode.

Abstract: A signal processing system processes an input signal in real time. The system includes a light valve array for selectively attenuating light incident thereupon in response to electronic control signals, a light source for providing illumination, a light-sensitive array for producing electronic output signals representing a processed version of the input signal in response to light incident thereupon, and control circuitry for generating and applying electronic control signals to the light valve array in response to the input signal. The electronic control signals are generated from the input signal and are adapted for implementing an arbitrarily-selected signal processing operation. The light valve array is situated between the light source and the light-sensitive array, such that the light source is selectively attenuated by the light valve array, and such that the selectively attenuated light is incident upon the light-sensitive array.

Abstract: A linear light source having a relatively large numerical aperture emits reading light of a substantially fully diffused light intensity distribution toward a film original that is held between support glass panels. The reading light passes through the film original and then through a slit that is disposed as a field stop between the film original and a reading lens and positioned closely to the film original for limiting a field of view with respect to the reading light. The reading light that has passed through the slit is converged by the reading lens onto CCD line sensors each having the same field of view as that of the slit.

Abstract: A scanning system comprising a cleaning apparatus for automatically cleaning originals prior to scanning and a dual mode scanner for scanning transmissive and reflective originals. The cleaning apparatus includes an ionizing dust remover and an electrically conductive brush assembly for sweeping dust and other foreign particles from the surfaces of the originals to be scanned.

Abstract: A pixel clock generator in which the frequency of a pixel clock signal is changed over for every scanning face prior to start of image record scanning, comprises a first scanning time detection circuit for detecting scanning period of time from the start of image scanning to the end of the image scanning; a reference clock signal generation circuit for generating a reference clock signal to make the frequency of the reference clock signal variable; a number-of-pixel-clocks setting circuit for setting the number of pixel clocks corresponding to forecast scanning time; a second scanning time detection circuit for counting the pixel clocks generated based the reference clock signal by the number set by the number-of-pixel-clocks setting circuit to detect the scanning time corresponding to the forecast scanning time; a comparison circuit for comparing the time detected by the first scanning time detection circuit with the time detected by the second scanning time detection circuit to obtain a comparison result; a

Abstract: An image reading device for reading image information of an original with reading means, includes: original pressing means including a flexible sheet, a flexible member for pressing the flexible sheet, and means for pressing the flexible member.

Abstract: An image input device having a movable carriage is provided with an origin detection element that moves out of the path of the document when the document is inserted into the carriage. Because the origin detection element moves out of the path of the document, even long documents, such as, for example, long strips of film containing multiple frames, can be read by the image input device without increasing the size of the carriage or of the image input device. The origin detection element includes a tapered edge that functions as a contrast marker. When the edge is located in the path of the light between the illumination source and the image reading device, the edge can be used to cause the generation of a signal by the image reading device to enable the detection of the point of origin of the carriage in the secondary scanning direction and/or in the focusing direction.

Abstract: Provided is an image sensing apparatus in which it is possible to use an optical system having a large aperture and an image sensing system such as an image sensing element in an image sensing cartridge docked with a portable image device. The image sensing apparatus includes a portable information device and an image sensing cartridge, which has at least an image sensing system, capable of being loaded in and unloaded from the information device. An image sensing operation becomes possible by docking the information device and the image sensing cartridge. The image sensing cartridge has an opening, which is for introducing light to the image sensing system, the aperture of which is designed to be larger than the shortest portion of an insertion port, which is provided in the information device, for inserting the image sensing cartridge.

Abstract: An image input equipment comprises an image input head having an image pickup element and an image input lens built therein, a stage on which an object is to be placed, a supporting pillar for supporting the image input head and positioning the image input head over the stage, said image pickup element for photoelectrically converting an image of the object to an electric signals, said image input lens for forming the image of the object on the image pickup element. The image input head is assembled pivotally on the supporting pillar to pick up the image of the object placed in front of and in rear of the stage as well as the image of the object placed on the stage. The image pickup element can be turned through an angle of at least 180.degree. on an optical axis of the image input lens integral with the image input lens.

Abstract: A device for converting the visual and/or auditory into tactile representations includes imaging equipment for converting light and/or sounds, including spoken text, into electrical signals, processing equipment for processing the electrical signals, and a tactile display for converting processed electrical signals into tactile images. The tactile images are felt by the user enabling them to obtain visual or auditory information by touch about the world around them that would otherwise be obtained through vision and/or hearing.

Abstract: A scanning apparatus providing an object focal plane for original documents to be scanned, wherein a scan carriage containing illumination, sensor, and optical elements is moved together to scan an original document and to obtain a digitized representation thereof. The movable carnage further includes an automatically-positioned alignment grid for aligning original documents, such that the grid is visible at the surface and moves with the scan carriage.

Abstract: An image reading apparatus for reading a document such as book, constructed to detect a height of the document. A line sensor captures an image of the document and a lateral side view of the document reflected on a mirror. Then the height of the document detected by the line sensor is corrected based on a deviation between a positions of the document image projected on the line sensor and the lateral side view of the document projected on the line sensor.