Abstract: A computer device is provided, in which in a case where a user manipulates characters displayed on a touch screen via a manipulation section displayed on the display, the user can easily figure out images located behind and overlapping with the manipulation section. A game machine includes a virtual manipulation section display module (virtual manipulation section display means) for displaying on a touch screen, a virtual manipulation section which accepts a user's manipulation; and a display color changing module (display color changing means) for changing display color information of the virtual manipulation section in response to the user's manipulation.

Abstract: The invention provides a method and an apparatus for displaying anti-aliased graphic objects. Subpixels are generated with two different memories including the one for alpha masking and the other for color storage, and function as a small virtual bitmap in which each position (i.e. subpixel) is set to be stainable on a one-off basis at every frame update. If plural objects share an identical pixel, the virtual bitmap for the pixel is to be filled gradually in forward-to-rearward order, reflecting the accurate objects' intensities. Transparent representation is processed via determination of active subpixels smaller in number than the number of subpixels, thereby shrinking the coverage of rendering objects in respective pixels. These active subpixels are selected with bit masks, and plural bit masks are provided to control transparent levels of rendering objects.

Abstract: The invention provides a method and an apparatus for displaying anti-aliased graphic objects. Anti-aliasing in prior art is often concentrated at the relationship between foreground object and background view, and such a case where plural objects reside in the same pixel is not necessarily put in the consideration. The present invention offers to provide “colored” subpixels for each pixel thereto render a plurality of anti-aliased graphic objects together in the same frame. Since the colored subpixels are generated with two different memories, they cannot be alpha blended. The transparent representation is to be processed with determination of active subpixels smaller in number than the number of subpixels, thereby shrinking the coverage of rendering objects in respective pixels. These active subpixels are selected through bit masks, and plural bit masks are provided to control transparent levels of graphic objects.

Abstract: A method and system for color enabled local area contrast enhancement, are provided by generating a first copy of an image; processing the first copy to locally enhance visual contrast in the image; generating a second copy of the image; processing the second copy of the image to provide at least one visual cue to radiant flux within the image incident on the focal plane pixels; displaying a combined image formed from the combination of the locally enhanced first copy and flux mapped the second copy.

Abstract: An electronic device and a method of operation thereof for facilitating the provision of an image as a background wallpaper of a user interface for display on a display of an electronic device, the device being configured to display the user interface and wallpaper in first and second different orientations during use, comprising: generating, based on the image, a first thumbnail representation of the appearance of the display having the image as the background wallpaper in a first orientation; generating, based on the image, a second thumbnail representation of the appearance of the display having the image as the background wallpaper in a second orientation; and simultaneously displaying on the display the first and second thumbnails.

Abstract: One embodiment is directed to a computer program, embodied on a computer readable medium. The computer program is configured to control a processor to execute instructions. The instructions include sampling a plurality of points that lie within the interior of an arbitrary shape, drawing one or more rectangles from each of the points, gradually increasing the length and width of the rectangles until the rectangles no longer falls within the interior of the arbitrary shape, and assigning the largest of the increased rectangles as the interior bounding box.

Abstract: A method for visualizing a registration quality of medical image datasets is provided. A reference image and an object image are acquired and registered with each other to form a merged image by a registration method having a non-elastic and an elastic registration method section. A deformation field is determined having displacement vectors from image points of the object image to image points of the reference image which are conditioned by the elastic registration method section. One region of the merged image is overlayed with an overlay into which parameters of the deformation field are fed. The region of the merged image and the overlaid overlay is visualized.

Abstract: Disclosed is an image drawing device including a gradation drawing unit for generating two background drawing objects which are to be located in a lower layer than a gradation target drawing object and drawing the gradation target drawing object on one of the background drawing objects while carrying out an antialiasing process between the one of the background drawing objects and the gradation target drawing object to generate a source image, and combining the source image on a basis of an alpha map to generate a destination image.

Abstract: Embodiments of the present invention provide improved systems and methods for providing a virtual terrain display. In one embodiment, a method comprises identifying a location within an enclosure. The location is referenced against an external environment containing the enclosure. The method also comprises identifying a portion of a structure of the enclosure. The portion of the structure exists between the location and the external environment and blocks a view of the external environment. The method also comprises generating a display depicting a view of the external environment from the location; and applying a translucent structure representation to the display. The structure representation is a visual depiction of the portion of the structure and appearing in front of the depicted view without blocking the depicted view of the external environment.

Abstract: Provided herein are methods and systems for image registration from multiple sources. A method for image registration includes rendering a common field of interest that reflects a presence of a plurality of elements, wherein at least one of the elements is a remote element located remotely from another of the elements and updating the common field of interest such that the presence of the at least one of the elements is registered relative to another of the elements.

Abstract: An assembling method for assembling a measurement or production set-up includes providing an augmented reality system with a processing device, an output device and a sensing device. The sensing device captures sensing data belonging to a working space. The method then includes providing first and second set-up components having first and second markers at the working space where the second set-up component is connectable to the first set-up component. The method captures the first and second markers by the sensing device and identifies the first and second marker. The processing device retrieves respective digital information assigned to the identified first and second markers from a database and makes a decision on the compatibility of the first set-up component with the second set-up component based on the retrieved digital information. An augmented representation of at least part of the captured sensing data and the decision on the compatibility is output.

Abstract: An information display device includes: an image display unit that displays an image according to an orientation of a display screen; a terminal posture detection unit that detects a posture of the device using an acceleration sensor, an angular velocity sensor, and a geomagnetic sensor; and a display direction determination unit that determines whether or not the posture of the device changes, and determines the orientation of the display screen. In the case where the display screen is substantially horizontal and the posture of the device changes, the orientation of the display screen is determined so that, when the device moves by a predetermined angle or more with respect to the orientation (reference orientation) of the display screen before the determination of the posture change, a side of the device at the predetermined angle or more from the reference orientation corresponds to the top of the display screen.

Abstract: An approach is provided for custom zooming of geographic representation. A custom zooming application determines an input specifying a level of zoom for rendering a geographic representation presented at a device, the geographic representation including a plurality of objects. The custom zooming application determines respective degrees of relevance of the plurality of objects based, at least in part, on the device, a user of the device, related context information, or a combination thereof. The custom zooming application determines to render one or more of the plurality of objects with at least one different level of visibility with respect to other ones of the plurality of objects based, at least in part, on the respective degrees of relevance, the level of zoom, or a combination thereof.

Abstract: An information processing terminal is provided with a first display and a second display and a control means that, when start-up of a first application has been instructed, displays the windows of each of the first application and a second application on the first display or the second display. The control means determines displays on which the windows of each of the first application and the second application are to be displayed based on the relation between the first application and the second application.

Abstract: An acquisition unit acquires list data concerning contents and records the acquired list data in a recording medium. A list display unit arranges a plurality of content images adjacent to each other and places them on a screen. As a receiving unit acquires an instruction to select one of the content images in a content list, the list display causes a display of the content list including a selected content image, in a first area of the screen and, at the same time, causes a display of detailed information associated with the selected content image, in a second area of the screen.

Abstract: A control circuit includes a power supply, a control IC, a liquid crystal panel, a driving integrated chip arranged between the control IC and the liquid crystal panel, and a number of voltage adjusting sub-circuits. The driving integrated chip includes a plurality of output ports for outputting a plurality of driving voltages respectively. Each voltage adjusting sub-circuit is arranged between the corresponding output port of the driving integrated chip and the liquid crystal panel for adjusting an initial value the voltage outputted from the corresponding output port before the driving voltage is transferred to the liquid crystal panel. With the voltage adjusting sub-circuits, the driving voltages received by the liquid crystal panel have the same value to avoid the color deviation of the images displayed in the liquid crystal panel. This improves the display effect of the liquid crystal panel under without increasing the layout area.

Abstract: A display device including a display panel displaying a still image and a moving image and a signal controller controlling signals to drive the display panel, wherein the signal controller includes a frame memory storing image data of the still image and providing the image data to the display panel, and the display panel is driven with a first scan ratio when displaying the moving image and is driven with a second scan ratio that is lower than the first scan ratio when displaying the still image.

Abstract: Provided are organic electroluminescence elements that suppress SP loss even in a strong cavity satisfying a ?/4 interference condition, thereby being improved in luminous efficiency. The organic electroluminescence elements emit light having a peak wavelength of 440 nm or more to 470 nm or less, in which a wavenumber difference ?k (Re) between surface plasmons generated at respective reflecting electrode and transparent electrode falls within a specific range.

Abstract: A display device and a method for manufacturing the same which can improve the reliability of TFTs and provide good contrast characteristics are provided. A display device according to the present invention includes a light-transmissive substrate; an impurity-doped layer provided in a part of the light-transmissive substrate; an insulating film provided on the impurity-doped layer and the light-transmissive substrate; a TFT circuit formed on the insulating film and including a plurality of TFTs; and a shutter array including a plurality of shutters drivable by the TFT circuit.

Abstract: Crosstalk is reduced to provide a high quality of image display when displaying a stereoscopic image on a plasma display panel. For this purpose, there is provided a method for driving a plasma display apparatus which displays the image on the plasma display panel, by alternately repeating a field for right-eye displaying an image signal for right-eye and a field for left-eye displaying an image signal for left-eye. The method is such that, in a first field and a temporally consecutive second field, for a discharge cell where a gradation displayed in the occurring-temporally-later second field is not larger than a predetermined comparison value, when displaying a gradation not smaller than a predetermined threshold in the occurring-temporally-earlier first field, image data are set where address operation is prohibited in a last subfield of the first field.

Abstract: A liquid crystal display module includes a liquid crystal display panel, a plurality of lamps for irradiating a first light onto the liquid crystal display panel, and a back light unit including a plurality of light emitting diode arrays, each of the light emitting diode arrays having a plurality of light emitting diodes arranged between the lamps to irradiate a second light onto the liquid crystal display panel.

Abstract: A multiple element emitter package is disclosed for increasing color fidelity and heat dissipation, improving current control, and increasing rigidity of the package assembly. In one embodiment, the package comprises a casing with a cavity extending into the interior of the casing from a first main surface. A lead frame is at least partially encased by the casing, the lead frame comprising a plurality of electrically conductive parts carrying a linear array of LEDs. Electrically conductive parts, separate from the parts carrying the LEDs, have a connection pad, wherein the LEDs are electrically coupled to the connection pad, such as by a wire bond. This arrangement allows for a respective electrical signal to be applied to each of the LEDs. The emitter package may be substantially waterproof, and an array of the emitter packages may be used in an LED display such as an indoor and/or outdoor LED screen.

Abstract: Crosstalk is reduced to provide a high quality of image display when displaying a stereoscopic image on a plasma display panel. For this purpose, a driving method is provided in which one field is formed of a plurality of subfields each having an address period and a sustain period, image data is set to indicate light-emission/no light-emission for respective discharge cells for each of subfields in accordance with an image signal, and a field for right-eye for displaying an image signal for right-eye and a field for left-eye for displaying an image signal for left-eye are alternately repeated, which thereby displays the image on the plasma display panel. The method is such that, for a discharge cell displaying a gradation not smaller than a predetermined threshold, address operation is prohibited in the last subfield of each of the field for right-eye and the field for left-eye.

Abstract: A dimmer includes a pair of pivoting sections provided across an optical axis of a light beam and having pivot axes and a pair of light blocking sections held by the pair of pivoting sections and configured to pivot following pivoting of the pivoting sections to block the light beam. In a maximum light blocking state, positions in the optical axis direction of opposed ends on the optical axis side of the pair of light blocking sections are different from each other. In the maximum light blocking state, the opposed ends on the optical axis side of the pair of light blocking sections are arranged to overlap each other in a direction along the optical axis.

Abstract: A nail print apparatus which prints on a nail and a printing control method of the nail print apparatus. In one implementation of the present invention, the nail print apparatus includes a imaging section; a nail region information detecting section which detects an outline and an area of the nail region; a print design image generating section; an element position judging section which judges whether or not a design element is contained within the nail region; and a printing section. The print design image generating section positions a design element in a position in the nail region which corresponds to a position on a standard nail model an element to a value in proportion with a ratio of the area of the nail region to an area of the standard nail model.

Abstract: A nail print apparatus which prints on a nail and a print controlling method. According to one implementation, a nail print apparatus includes an imaging section, a finger dimension obtaining section, a storage section, a model selecting section, a region specifying section and a printing section. The model selecting section selects one specific nail region extracting model based on a dimension of the finger obtained by the finger dimension obtaining section. The region specifying section specifies a nail region to be a specific nail region extracting model selected by the model selecting section to a region of the nail in the finger image obtained by the imaging section. The printing section applies ink on the specified nail region.

Abstract: Gas bearing systems, print gap control systems, and methods of print gap control are provided. The gas bearing systems can accommodate one or more print module packages. The systems and methods can be used for inkjet and/or thermal printing applications such as manufacturing organic light emitting devices (OLEDs). Gas bearing systems can employ one or more of pressurized gas and vacuum. For oxygen-sensitive applications, an inert gas, such as nitrogen gas, can be employed as the pressurized gas. Fluid channels and apertures of the gas bearing systems can be varied in terms of size and relative position to one another. Fluid channels and apertures can be grouped and paired with one or more manifolds and ultimately a pressurized gas and/or vacuum source.

Abstract: An image forming apparatus includes a suction controller to seal a nozzle face of a recording head with a cap and drives a suction device to suck liquid from the head to perform sucking operation. The dummy ejection controller ejects, from the head, droplets not contributing to image formation to perform dummy ejection. The first tinier measures a first elapsed time after the dummy ejection. The second timer measures a second elapsed time after the sucking operation. A liquid discharge amount of the sucking operation is set to be greater than that of the dummy ejection. When the first elapsed time is equal to or greater than a first threshold time, the dummy ejection controller performs the dummy ejection. When the second elapsed time is equal to or greater than a second threshold time which is greater than the first threshold time, the suction controller performs the sucking operation.

Abstract: An ink-jet printing method includes the steps of dividing multiple ink droplet discharging pulses into two or more groups in an ink droplet discharging order, providing the multiple ink droplet discharging pulses to a pressure generator per scan line time, and discharging ink droplets from an ink droplet discharge head in accordance with the multiple ink droplet discharging pulses. The method further includes the steps of combining ink droplets of a former group as a first combined ink droplet, combining ink droplets of a latter group as a second combination droplet, combining the second combined ink droplet of the latter group with that of former group before the ink droplets reach a target, and maintaining a prescribed amount of ink droplets landing on the target by decreasing the number of ink droplet discharging pulses.

Abstract: There is provided a printing method that is performed by using a first nozzle ejecting color ink that is used for printing an image on a medium, a second nozzle ejecting a process solution that is used for processing the surface of the medium. The printing method includes printing an image constituted by color dots on the medium by ejecting the color ink from the first nozzle so as to form the color dots on the medium and forming process dots in areas other than the image on the medium by ejecting the process solution from the second nozzle, transporting the medium in a direction opposite to a transport direction after the color dots and the process dots are formed on the medium, and coating the color dots and the process dots with the process solution after the medium is transported in the direction opposite to the transport direction.

Abstract: Print data is generated to form an image on a printing medium by superposing a plurality of types of printing materials in some or all pixels of an output image in an order complying with the intensities of the light scattering characteristics of the plurality of types of printing materials. The generated print data is transmitted to a printing apparatus.

Abstract: A liquid ejecting device includes a driving waveform signal generating circuit that generates a driving waveform signal, a modulation circuit that performs pulse modulation on the driving waveform signal to generate a modulation signal, a digital power amplifier that amplifies power of the modulation signal to generate a power amplification modulation signal in the form of a pulse wave, a filter that smoothes the power amplification modulation signal in the pulse wave to generate the driving signal, a connection cable that connects the filter to the capacitive load and is provided such that at least one of the filter and the capacitive load is detachable, a connection line information acquiring unit that acquires connection line information associated with the connection cable, and a frequency changing unit that changes a frequency when the modulation circuit performs the pulse modulation on the driving waveform signal, on the basis of the connection line.

Abstract: It is an object of the present invention to provide a technique which is capable of always achieving excellent print quality even in any use environment. In order to attain this object, a provisional print read data acquisition part displays provisional print read data which is acquired by reading a provisional printed matter, on a display part. When a user selects a position in the provisional printed matter through a provisional print read data display screen on which the provisional print read data is displayed, a selected position corresponding head specifying part specifies a head which performs printing on the selected position which is received and determines the head as a head to be corrected. A density correction part corrects the density of a printing area of which the head to be corrected is in charge.

Abstract: An image recording apparatus includes a transport unit which transports a medium with a joint portion along a transport path, a head unit which performs recording of a printing image on both the joint portion and a non-joint portion by ejecting ink onto the medium, a heating unit which dries liquid forming the printing image by heating a portion of the medium located at a heating region on the transport path, a detection unit which detects the joint portion, and a controller which controls transporting of the medium by the transport unit so that a heating time of the joint portion in the heating region becomes longer than a heating time of the non-joint portion in the heating region on the basis of a detection signal from the detection unit.

Abstract: A method for calibrating in situ a plurality of printheads in an imaging device has been developed. Firing signals operate a plurality of printheads to form ink test patterns on an image receiving member. Reflectance measurements of light reflected from the test patterns and optical density measurements for a portion of the patterns formed by only one printhead in the plurality of printheads are used to adjust the firing signals and enable the printheads to print within a predetermined range about an average reflectance value and a predetermined optical density.

Abstract: A non-aqueous ink comprising a carbon black and a non-aqueous solvent is provided, wherein the carbon black comprises: a carbon black (A) having a primary particle size of at least 18 nm but less than 30 nm, a DBP absorption of at least 80 cm3/100 g but not more than 130 cm3/100 g and a pH of at least 6.0 but not more than 9.0, and a carbon black (B) having a primary particle size of at least 30 nm but not more than 50 nm, a DBP absorption of at least 40 cm3/100 g but less than 80 cm3/100 g and a pH of at least 6.0 but not more than 9.0.

Abstract: Provided is an inkjet ink which can form high-quality images with high abrasion resistance and adhesiveness on a non-absorptive recording medium and which exhibits high ejection properties and excellent storage stability. Also provided is an inkjet recording method. An inkjet ink which comprises water, a pigment, a water-soluble resin, a water-soluble organic solvent and a surfactant, characterized in that: the water-soluble resin comprises a water-soluble resin consisting of a copolymer resin which has an acid value of 50 to 130 mgKOH/g, a glass transition temperature (Tg) of 30 to 100° C.

Abstract: An inkjet recording ink, which contains: carbon black; a surfactant; water; a water-soluble organic solvent; and particles formed of an anionic self-emulsifying poly(ether urethane) resin, wherein the carbon black contains first carbon black whose surface has been treated with an anionic surfactant and second carbon black which has been coated with a resinous polymer, where a mass ratio of the first carbon black to the second carbon black is 10/90 to 90/10, and wherein the anionic surfactant is a naphthalenesulfonic acid-formaldehyde condensate.

Abstract: An inkjet printer 1 has a cap 31 that covers the ink nozzle surface 18 in which ink nozzles 17 are formed when the inkjet head 6 is at a inkjet head standby position 6B; an ink absorber 37 that is held inside the cap 31 and absorbs ink ejected from the ink nozzles 17 into the cap 31; a water discharge head 12 that seals the cap 31 with a water nozzle surface 22 in which water nozzles 20 are formed when the inkjet head 6 is at the printing position 6A; and a suction pump 38 for discharging water from the water discharge head 12 when the water discharge head 12 seals the cap 31.

Abstract: A printhead maintenance assembly for maintaining an ink ejection face of an inkjet printhead. The printhead maintenance assembly includes: a first transfer roller having a transfer surface for receiving ink from the ink ejection face; a drive mechanism configured for rotating the first transfer roller; and a second transfer roller for engagement with the first transfer roller. During use, the second transfer roller receives ink from the first transfer roller.

Abstract: An image forming apparatus includes a carriage to mount a recording head which discharges a liquid droplet on a recording medium to form an image, a carriage guide member to support the carriage and move the carriage to scan in a main scanning direction orthogonal to a sub-scanning direction in which the recording medium is conveyed, and a recording medium conveyance unit detachably mounted to a main body of the apparatus which includes an endless conveyance belt to convey the recording medium being adsorbed on the belt, and a pair of rollers around which the conveyance belt is extended circulating in the sub-scanning direction. The carriage is cantilevered by the carriage guide member, and the recording medium conveyance unit is removable from a space above the conveyance belt, in an area other than the carriage guide member.

Abstract: An aspect of the invention provides an ink composition ejected from a nozzle having a step, the ink composition containing at least any one of a first water-soluble organic solvent and a second water-soluble organic solvent, wherein the first water-soluble organic solvent exhibits a surface tension of 30 mN/m or lower at 20° C., an aqueous solution of the second water-soluble organic solvent of 10 mass % exhibits a surface tension of 50 mN/m or lower at 20° C., and the total content of the first water-soluble organic solvent and the second water-soluble organic solvent is 0.15 mass % or higher.

Abstract: A printing system (30, 40, 40?, 50, 50?) includes at least one ejector coupled to a reservoir (38) that is configured to contain a printing composition including a hydrocarbon having at least one unsaturated bond. The hydrocarbon is configured to at least one of polymerize or crosslink in the presence of a reactive species. The at least one ejector is configured to eject the printing composition onto a surface (34, 36, 10). The system (30, 40, 40?, 50, 50?) further includes a corona generator (32, 32?, 32?, 32?) configured to generate the reactive species in situ. The corona generator (32, 32?, 32?, 32?) is positioned with respect to the reservoir (38) such that the reactive species is exposed to the printing composition after the printing composition has been ejected onto the surface (34, 36, 10). The polymerizing and/or the cross-linking of the hydrocarbon is configured to form a polymer matrix (12) from the ejected printing composition.

Abstract: The purpose of the present invention is to provide an ink jet head capable of ejecting an exact amount of ink, an angular velocity sensor capable of measuring an exact angular velocity, and a piezoelectric generating element capable of generating an electric power due to positive piezoelectric effect, even when the applied electric field of 40 kV/cm or more is applied. The piezoelectric film used for the present invention comprises a piezoelectric layer and first and second electrodes which sandwich the piezoelectric layer therebetween, the first electrode comprises a (001) orientation, the piezoelectric layer is composed of (1-z)(NaxBiy)TiO0.5x+1.5y+2-zBaTiO3 having a (001) orientation, x is not less than 0.30 and not more than 0.46, y is not less than 0.51 and not more than 0.62, and z is not less than 0.07 and not more than 0.09.

Abstract: Ink concentrate container, comprising an inner volume, containing ink for liquid electrostatic printing (LEP), the ink comprising a carrier liquid and electrically chargeable toner particles for electrostatic imaging, an outlet, and at least one flexible wall extending along the inner volume, so that ink can be pressed through the outlet out of the inner volume by deforming the flexible wall.

Abstract: Provided is a print preparation method possessing an ejection step in which liquid drops of actinic energy radiation curable type ink-jet ink each containing a polymerizable compound, a photo-polymerizable initiator and a gelling agent are injected from an ink-jet recording head to supply the actinic energy radiation curable type ink-jet ink onto a recording medium, and an actinic energy radiation exposure step, wherein the print preparation method further comprises step (A) in which the recording medium is exposed to electromagnetic waves having a longer wavelength than a wavelength of an absorption wavelength of the photo-polymerization initiator contained in the actinic energy radiation curable type ink-jet ink from a side of a surface on which the image is formed, before conducting the actinic energy radiation exposure step, the print preparation method by which a print having images exhibiting excellent image wear resistance, gloss evenness and image density evenness is provided.

Abstract: A method of manufacturing a printed matter in which a printed matter is manufactured by print images with consecutive numbers on a medium includes a recording base material, and a separating base material which is provided at a side opposite to the recording base material, and has a joint portion formed on both the recording base material and the separating base material, and the method includes arranging the print image on both the joint portion and non-joint portion in numerical order to be aligned, printing the same image as the image recorded on the joint portion on the unrecorded non-joint portion, cutting a portion of the recording base material from the separating base material, separating the separating base material to which a portion of the recording base material corresponding to the image recorded in the joint portion is adhered.

Abstract: A printing device with a marking function is provided. The printing device includes a printing module, an identification module and a marking member. The printing module is used for printing images on a transfer paper, thereby producing a barcode paper. The identification module is used for scanning the barcode paper, and judging the printing quality of the barcode paper. If the printing quality of the barcode paper is unqualified, the marking member produces a mark on the barcode paper. In addition, the barcode paper is successively transported through the printing module, the identification module and the marking member.

Abstract: The data conversion unit of an image forming apparatus converts input image data into dot image data in which pixel values having gradation information are arranged in a matrix. A storage unit stores optical face tangle error information of each reflecting surface of a rotary polyhedron. An assignment unit assigns a number to each of the plurality of reflecting surfaces, specifies by which of the plurality of reflecting surfaces light emitted for each line of the dot image data is to be reflected and assigns the number of the reflecting surface to each line of the dot image data. A determination unit determines a light emission mode corresponding to the dot image data based on the optical face tangle error information and the number of the reflecting surface. An exposure control unit causes the light source to emit light in accordance with the determined emission mode.

Abstract: An image forming apparatus to form an image by optical scanning includes a light emitter to emit a light beam; a rotary reflective mirror to reflect the light beam; a photoreceptor to receive the light beam reflected by the rotary reflective mirror to form a latent image; a light sensor to detect the light beam; and an optical scanning controller to control scanning of the light beam. In such an image forming apparatus, the optical scanning controller causes the light emitter to emit the light beam when the light beam does not expose an area of the photoreceptor where a latent image is formed and adjusts a power of the light beam in discrete increments to a predetermined level appropriate for optical scanning.