Abstract: A high-quality image is formed by using light emission element arrays of plural lines. The plural light emission element arrays are arranged substantially in parallel, an area of a light emission part of each array being different from others, respective light emission elements in the light emission element arrays are caused to selectively perform light emission according to gradation data, and the respective light emission element arrays overlappingly perform exposure on a relatively moved photosensitive body.

Abstract: A printer control pictorial tool consists of an eye portion having a neutral gray, portraits arranged around the eye portion, and a gray background. The eye portion and the portraits are located within a photometric range that is equal to or less than a range covered by a photometry device of a photo-printer. The gray background has the same average gray density as the eye portion has. An area having a complementary color to a flesh color of the portraits is provided within the photometric range. The size, color and density of the portraits and the complementary color area are determined such that photometric values obtained from the photometric range are approximately equal to those obtained from the eye portion.

Abstract: A digital photograph printer comprising a transport mechanism, a modulated light source (1206), and an exposure controller (1302). The transport mechanism for advancing a photosensitive medium (1202) through an exposure region (1200) such that said photosensitive medium advances one row of pixel locations each row period. The modulated light source (1206) is operable to selectively provide a beam of light to an array of individually modulated regions (1300, 1306, 1310) in an exposure region (1200). As the photosensitive medium (1202) moves through the exposure region (1200) the individually modulated regions in the exposure region (1200) have the opportunity to expose each pixel locations in the exposure region (1200) once each row period. The exposure controller (1302) operable to control the modulated light source (1206) based on image data provided to modulated light source.

Abstract: In a method of correcting output light quantities of a plurality of optical output media aligned in one direction in an optical writing apparatus that activates and deactivates the optical output media in multi-gradation to thereby perform optical writing onto an object onto which writing is to be performed, the quantity of light outputted from each of the optical output media is measured, and a variation in the output light quantities of the optical output media is corrected based on a result of the measurement. In performing the correction, in a specific gradation range, correction is performed so that the output light quantities of the optical output media are not made uniform.

Abstract: There is described an image recording apparatus, which includes an input device for inputting image data, a recording element to record images on an image recording medium in accordance with the image data, a memory device for storing a plurality of information groups having relationship between image data and recording energy control data, a discriminator for discriminating a sort of the image recording medium, a selector for selecting at least one information group out of the plural information groups in accordance with the sort of the image recording medium discriminated by the discriminator, and a controller for controlling the recording element on the basis of the information group selected by the selector.

Abstract: The invention relates to a method and an apparatus for copying transparencies to a light-sensitive material, the apparatus including an illuminator for illuminating the original, wherein the illuminator has a plurality of individually addressable pixels which can be switched to light or dark and which are controlled according to a raster image. The density values of the original are first determined with a predetermined spatial and gray-scale resolution and the raster image is subsequently generated from the density values of the original according to the error diffusion method.

Abstract: When an image is scanned and recorded on a photosensitive material, the quantity of emitted light of each of light emitting elements is corrected by controlling, based on digital image data, quantities of light beams emitted from light emitting portions of three colors, which each consist of a plurality of light emitting elements. A drive signal level of each of the light emitting elements is corrected for the same digital image data so that the light emitting elements which emit light beams of the same color have the same quantities of emitted light. Subsequently, the drive signal level of each of the light emitting elements is corrected for predetermined digital image data so that the ratio of the quantity of emitted light between the light emitting elements, which emit light beams of different colors, is set at a predetermined value.

Abstract: A device for point-form photoelectric scanning of a transparent object to be measured is disclosed and is provided with a transport arrangement for transporting an object to be measured. An illuminating arrangement exposes the object to measuring light in a line-shaped measuring line extending across the object transverse to the transport direction. A collector arrangement collects measuring light passed through the object in the area of the measuring line. A photoelectric converter arrangement, optically connected with the collector arrangement, converts measuring light passed through the object into corresponding electrical signals. The collector arrangement includes a multiplicity of light conductors, an optical multiplexer with multiple inputs corresponding in number to the multiplicity of the light conductors, and an output.

Abstract: A light source position adjusting method and system are used for an image input apparatus including a light source for irradiating film original. A light source moving device is operable from the outside of the external cover of the image input apparatus. A position of the light source is adjusted from the outside of the external cover using a measuring tool so that the quantities of light are uniformly balanced at a plurality of measuring points on the plane of the film original. The measuring tool is thereafter removed. The average value of the output values in the specific pixel regions of the image sensor corresponding to the plurality of measuring points on the plane of the film original are determined and the balance output values of the respective pixel regions are stored. The position of the light source is adjusted so that the output values of the image of the light source are made equal or closer to the balanced output values stored.

Abstract: A light strength equalizing device for a light source is provided. The device includes an illuminated area, a light source emitting a light for illuminating along a light path the illuminated area with different light strengths, and a compensating device mounted in the light path for respectively compensating the different light strengths in order to equalize the different light strengths on the illuminated area.

Abstract: By the present invention, on the basis of information read from a magnetic recording section of a negative film (Step 200), when it is judged that there are a plurality of negative images to be exposed by the same exposure amount (the judgment in Step 212 is affirmative), a film type is identified to determine the film base density thereof, and a predetermined reference density value is added to the film base density so as to obtain a density control amount which controls the density of a print image (Steps 216 through 220). Thereafter, a color balance mean value of a large number of negative images of the same type is detected and a weighted mean value of a color balance mean value among a plurality of negative images to be exposed and the detected color balance value to obtain a color control amount (Step 222).

Abstract: A method and apparatus for producing index prints makes the trend of compensation for main prints coincide with the trend of compensation for the index prints. When a scanner determines an exposure compensation amount for each frame based on image data of each frame of a negative film, the information representing the exposure compensation amount for each frame is transmitted to the drive controllers via a controller. In a main print section, an exposure process is performed by the drive controller based on the information regrading the exposure compensation amount for each frame, thereby obtaining a main print. In an index print section, an exposure process is performed by the drive controller based on the same information regrading the exposure compensation amount for each frame, thereby obtaining an index print. Also, a density adjusting method easily and automatically adjust unevenness in density produced in an image printing stage.

Abstract: Film frames are scanned preparatory to copying and a set of density values is generated for each frame. When a frame exhibits excessive contrast, a mask is calculated using the respective set of density values. The calculated mask is formed on an LCD or LED matrix which is in register with the frame. An image of the masked frame is then projected onto copy paper by a zoom objective. The mask has a size which is a function of the magnification factor and/or the mask-to-frame distance.

Abstract: In transmission of a serial digital data, a serial digital data and inverted data thereof are generated first. Then, one of the serial digital data, and an inverted data of the one of the serial digital data are transmitted successively after the one of the serial digital data according to clock signals. Thus, a pair of the one of the serial digital data and the inverted data is transmitted through a transmission line in the order of the serial digital data. Among the received signals, a first data is sampled at a leading or trailing edge of the clock signal, while a second data is sampled at a trailing or leading edge of the clock signal just after the leading or trailing edge. Then, the first data is stored as a data in a serial data only if the second data is an inverted logical data of the first data. Thus, the serial data are transmitted and latched correctly without interrupting serial transmission even when the received signals include noises.

Abstract: A copying apparatus is adjusted in order to produce high-quality copies of transparent negatives or diapositives having excessive variations in brightness. The adjustment is performed using a reference master. The apparatus is properly adjusted when a copy of the reference master meets specific criteria.

Abstract: A method of color balance determination for use by a color copying apparatus utilizing a gray estimate established as a functional relationship among at least three basic color density values measured from regions within multiple image frames of a film order. This functional relationship is preferably a fitted line to a set of measured density values from which density values from regions of high color saturation have been excluded. To discriminate these high color saturation regions, the color saturation is determined relative to a gray point calculated as a weighted average of minimum density and image average density values. Further improvement in the gray estimate is achieved by limiting the set of measured density values to regions of high modulance ("edge effect") within the image frames.

Abstract: A color printer prints a color image on photosensitive material by utilizing a digital micromirror device. The digital micromirror device is provided with four micromirror arrays constituted of plural micromirrors. The four micromirror arrays record four lines on a photographic paper at the same time while the photographic paper is successively advanced at constant velocity. Red exposure sequence, green exposure sequence and blue exposure sequence are performed in order while the photographic paper is advanced by L. Each of the exposure sequences is changed in order every advancement of photographic paper by L/3. The photographic paper passes through four lines projected by the four micromirror arrays in order. Accordingly, a pixel on the photographic paper is exposed four times at the ceiling by four micromirrors arranged on a same row for each color. Accordingly, multiple exposure is performed during advancement of the photographic paper.

Abstract: The present invention concerns a method of making photographic prints on stock from negatives that differ in density range. The appropriateness of the exposure gradient of the stock for the particular negative is ensured by employing stock with a definite "contrast-Schwarzchild-effect" and by so varying the intensity of the light that the negative is exposed to during printing that the gradient is adapted to the characteristics of the particular negative as a function of the accordingly varied printing time.

Abstract: A master to be copied has a picture in which a dark region and a light region are located one behind the other. The two regions are separated by a light/dark transition where a halo can develop on copies of the master. Prior to copying, the master is scanned and the resulting data used to produce a mask for the master. The mask has a light/dark transition corresponding to the light/dark transition of the master. However, the light/dark transition of the mask is shifted relative to the light/dark transition of the master. The shift is such that, when the mask is superimposed on the master, the light/dark transition of the mask is superimposed on a region of the master which reduces the visibility of the halo. The master is copied following masking.

Abstract: An image exposing device which, on the basis of image data, modulates light beams outputted from three light sources having respectively different wavelengths, and which scans/exposes the light beams onto a photosensitive material. The three light sources includes a first light source having a light-emitting peak wavelength in a vicinity of 635 nm, a second light source having a light-emitting peak wavelength in a range of 670 to 710 nm, and a third light source having a light-emitting peak wavelength in a vicinity of 780 nm. The photosensitive material includes a first photosensitive layer having a peak spectral sensitivity corresponding to the first light source, a second photosensitive layer having a peak spectral sensitivity corresponding to the second light source, and a third photosensitive layer having a peak spectral sensitivity corresponding to the third light source.

Abstract: According to the improve method for use with image inputting apparatus to set the illuminance of reading light, the measurement with the image sensor is performed with the light source stop being adjusted to a specified initial value of degree of opening in the absence of original in an optical path and if an output from the image sensor is not within a specified range, either adjustment of the quantity of the light from the source or readjustment of the light source stop using a light source stop table which represents the relationship between the degree of opening of the light source stop and the output of the image sensor or both the adjustment of the quantity of the light from the source and the readjustment of the light source stop are performed and another measurement with the image sensor is performed in the absence of original in the optical path and these steps are repeated until the output from the image sensor comes to fall within the specified range, and if the output falls within the specified ra

Abstract: A method and an apparatus for controlling exposure are disclosed. A light beam carrying gradation image information is projected to writing side of spatial light modulating means and another light beam is projected to reading side of the modulating means to obtain a light beam for exposure in accordance with the intensity of the light beam to the writing side. By varying the reflectance on the reading side in accordance with the gradation image information, the light beam for exposure is obtained and the amount of exposure is controlled. The reflectance on the reading side is controlled by continuously varying the intensity of the light to the writing side and/or by continuously varying the driving voltage of the modulating means.

Abstract: An image exposure method using a display panel, for exposing an image onto a photosensitive material by dividing the image into pixels which are arranged in a matrix pattern on the display panel and by adjusting amounts by which light is transmitted through or reflected at the pixels or an amount of emitted light. The method steps include: determining to effect exposure processing a plurality of times when a defective pixel whose amount of transmitted light, reflected light or emitted light cannot be adjusted, exists on the display panel; and effecting exposure processing a plurality of times, wherein the exposure processing of a plurality of times includes exposure with a relative position of a group of pixels arranged in a matrix pattern on the display panel and split images corresponding to the pixels being displaced, and an amount of exposure for each time of exposure processing is an amount given by dividing an overall amount of exposure in accordance with the number of times of displacement.

Abstract: In a photographic printer, red, green and blue light beams are modulated respectively according to red, green and blue image signals DR, DG and DB each made up of image signal components representing densities of respective picture elements, and a color image is recorded on a color photosensitive material by scanning the photosensitive material with the modulated light beams. Picture elements which are of brightness not higher than a first predetermined brightness close to the shadow or not lower than a second predetermined brightness close to a highlight and are of chroma not higher than a predetermined chroma are detected on the basis of the image signals DR, DG and DB. The image signal components for the detected picture elements which form a continuous region in the image are excluded from the image signals DR, DG and DB, thereby obtaining image signals DR', DG' and DB'.

Abstract: An index printer in which density correction can be reliably effected and in which an appropriate image can be printed is obtained. When a standard image data such as a so-called Bull's eye is input from an image memory to a gray image processing portion of a sub-control portion, data which is greater than a predetermined threshold value Q is extracted from the standard image data and is averaged so as to set a standard gray image. The set standard gray image is displayed on a whole surface of a display surface of a liquid crystal panel via a liquid crystal panel driver, and is printed onto a photographic printing paper by a light source.

Abstract: An image printer includes a negative-film projection exposure unit capable of projecting and exposing image information of a negative film on to a photosensitive material adapted for negative films and a positive-film exposure unit capable of exposing image information of a positive film on to the photosensitive material adapted for negative films.

Abstract: An apparatus for making a lithographic printing plate according to the silver salt diffusion transfer process image-wise exposes an imaging element with a high intensity short time scanning exposure. The imaging element comprises on a support in the order given a silver halide emulsion layer and a layer containing physical development nuclei. A thus obtained image-wise exposed imaging element is subsequently developed in the presence of a developing agent and silver halide solvent. The image-wise exposure is focused substantially within the silver halide emulsion layer of the imaging element.

Abstract: A printer control film and a film carrier allow proper management of the printer control film. When a Bull's-eye serving as the printer control film is inserted into the film carrier, magnetic information recorded on the Bull's-eye is read out. When it is judged based on the read out information that the Bull's-eye is an unused one, a start time of use is recorded on the Bull's-eye together with an apparatus ID. When it is judged that the Bull's-eye was used before, the apparatus ID, the used period, the number of times of use, and the like are read out from the Bull's-eye. When it is judged based on these data that the Bull's-eye carries proper images necessary for a conditioning operation, the number of times of use is updated. Subsequently, images recorded on the Bull's-eye are printed onto a printing paper.

Abstract: A method of correcting the light amount irregularities for a photographic printer in which an image displayed on a two-dimensional display unit is exposed by transmitting or reflecting the light from a light source through or from the two-dimensional display unit is disclosed. An LED light source is turned on with a predetermined driving voltage applied to all the pixels of a liquid crystal panel. The image on the liquid crystal panel is exposed for a predetermined length of time by the light transmitted through the liquid crystal panel and developed thereby to produce a photographic print. The density at a point corresponding to each pixel of the liquid crystal panel is measured. The light transmittance correction amount for each pixel of the liquid crystal panel is determined in such a manner that the density measured at each point conforms to a predetermined reference density (a minimum value of density measurement, for example).

Abstract: An information recording apparatus has an LUT storing a table, which represents a relationship between a key code and 2401 combinations of density correcting data and color correcting data. The combinations are arranged in the table in an order of frequency of occurrences thereof. Each combination constitutes exposure correcting information in combination. With a photo film exposed, a photoprint is produced in initial photographic printing from an imaging frame on the photo film. A key code is read from LUT, with an address of the exposure correcting information used in the printing. An imprinting head imprints the key code to the photoprint or containing sheath. With the key code imprinted, the exposure correcting information is usable in further photographic printing.

Abstract: A photographic printer includes a light source for radiating light rays for photographic printing to a film; a unit for fixing the film; a unit for providing a film information signal by detecting the light filtered through the film; an image processing unit for processing the film information signal and generating a corresponding control signal; an image display unit located between the light source and the film for displaying an image corresponding to the control signal; and a focusing unit for forming an image on a printing paper according to the light filtered through the image display means and the film.

Abstract: A photographic image exposing apparatus includes a white light source and a filtering device provided between the white light source and a photographic paper. The filtering device has color filters corresponding to respective light spectrums and is operable to interrupt a light beam traveling from the white light source to the photographic paper to separately allow the corresponding light spectrums to pass therethrough. A light amount adjuster is operable to change respective interrupting times of the color filters with respect to a predetermined exposing range.

Abstract: An image exposure system for printing an image, comprised of pixels, on photosensitive media based on image data, includes an exposure unit for converting the image data into a light signal for exposure of each of the pixels, a measuring device and a compensator used to correct exposure levels. The exposure unit has light output elements for outputting the light signal for respective ones of the pixels onto the photosensitive media to effect exposure of the image on the photosensitive media. The measuring device is for measuring a density of each of the pixels of the image on the photosensitive media produced by exposing the photosensitive media with reference image data as the image data.

Abstract: Film images of all frames are captured in a first scanning in a low resolution for displaying as an index image, and the captured image data is stored in an image memory. Then, the index image is displayed on a display according to the image data. When the user designates a frame for printing and enters the print information of the frame by use of the index image displayed on the display, a second scanning of the frame is performed conforming to the print information. That is, the frame image is captured in a high resolution for printing, and the captured image data is stored in the image memory. Then, the frame image is printed on a printer according to the print information. While the printer is printing the frame image, the images of frames on the film are displayed frame by frame on the display in accordance with the image data for the index image stored in the image memory.

Abstract: An exposure of a color film is scanned at a multiplicity of points in each of the primary colors. The color compositions of the points are evaluated to identify color compositions characteristic of skin tones, and a color space is created based on these color compositions. Scanned points whose color compositions lie in the color space undergo an examination to ascertain whether or not they actually represent skin. The examination is concerned primarily with the positions of such scanned points within the exposure and secondarily with density differences between the points and specified zones of the exposure, density differences between adjacent points, and the nature of any groups formed by the points, only those scanned points which actually represent skin are considered when calculating the amount of copy light for the exposure in each primary color.

Abstract: A method of making more visible some characteristic to be included in a hard copy of a recorded image includes reading a variable visible characteristic within a predefined area of the recorded image to determine the visible composition of the variable characteristic. At least one stored variation of the variable characteristic is selected, based on the visible composition of the read variable characteristic, from a plurality of stored variations of the variable characteristic. The selected stored variation of the variable characteristic will have greater visibility within a predefined area of the hard copy, which corresponds to the predefined area of the recorded image, than the variable characteristic within the predefined area of the recorded image. The selected one or more characteristics are included in the predefined area of the hard copy.

Abstract: A color copying apparatus for constantly obtaining a high-quality print irrespective of a change in film characteristics due to deterioration over time and the like is disclosed. A reference image recorded on the film is photometrically measured to determine film characteristic data. After logarithmically transformed values of photometric values of an original image on one film set in a printing position have been stored, normalizing conditions are determined on the basis of average image data, and a transformation formula or table for transformation between the film characteristic data and image data is generated in correspondence with a film type. Pixels are then selected from the original image set in the printing position, and a characteristic amount of the image is calculated and is made to correspond to print characteristic data by means of the transformation formula or table.

Abstract: The improved method of determining the amount of exposure for use with an image forming apparatus reads the red, green and blue densities of an original image on a pixel basis and determines the amount of exposure of a light-sensitive material in accordance with the result of the reading step. In the method, those pixels of the same color which have been found to have red, green and blue densities within respective predetermined ranges as a result of the reading of said original image are added and after at least part of the pixels that represent a color having a greater number of pixels than a specified value are removed, the remaining pixels are used to perform mathematical operations for determining the amount of exposure.

Abstract: Respective light-emitting elements are caused to emit light at the maximum rated outputs and densities of three colors developed by a photosensitive material are made substantially uniform. The maximum rated outputs at light-emitting central wavelengths, of the three-color light-emitting elements are respectively 2.4 mW, 0.04 mW and 1.2 mW. The ratio between the outputs is represented as R:G:B=60:1:30. On the other hand, the ratio between spectral sensitivities of the most-frequently used photosensitive material is represented as R:G:B=1:30:2. An exposure-value ratio on the photosensitive material, which is synthetically obtained from these, reaches R:G:B=2:1:2. Thus, the numerical ratio among the light-emitting elements, for making exposure values uniform becomes R:G:B=1:2:1. The numbers of the respective light-emitting elements are defined so as to reach the least numbers from the numerical ratio (i.e., one R-light-emitting element, two G-light-emitting elements and one B-light-emitting element).

Abstract: An exposure apparatus capable of color exposure operation and monochrome exposure operation. When a color exposure operation request is made, at least one of a red, blue, or green filter is positioned in a light path to produce exposure light having a predetermined wavelength. When a monochrome operation request is made, the color filters are retracted so as to allow white exposure light to pass.

Abstract: A monitor adjusting system facilitates image adjusting procedures such as color or density correction. Prior to printing an image onto photosensitive paper, the exposure settings are selected so that the printed image on the print paper will have proper colors and densities. Initial adjustments are made to the exposure setting based on the actual images being developed. To check the correctness of the changes in exposure setting for the actual images, the operator inserts a color calibration (reference) film strip which is read and displayed by the system. The film strip will display two images: (1) a reference scene of a human subject or a landscape and (2) either a density chart or a color chart. The images are used as indicators of the correctness of the adjustments made.

Abstract: During the processing of an order in a photographic printer, a developed copy film strip can be scanned negative by negative and point-by-point in a scanning station of the printer. From the scan signals, density values for exposure time determination in three partial colors and details on the image field number of the scanned negative can be obtained, and these data are stored in a memory, coordinating the determined three partial exposure times with the corresponding image number. All negatives of the copy film strip are exposed successively on photographic paper on an enlarged scale, using the determined exposure times. In a further step, a number of successive negatives of the film strip are exposed on full-scale or reduced scale in matrix form onto a single sheet of said photographic paper.

Abstract: A photometric system for a photographic printing apparatus having an exposure device for projecting light traveling from a light source (21) through a mirror tunnel (24), along a projection path through a photographic film (2) to printing paper (3). An opening (24b) is formed in a side wall (24d) having a mirror surface for forming the mirror tunnel. The photometric system includes a photometer (60) disposed outside the mirror tunnel for metering only light entering through the opening (24b) from a region of the opening (24b) and a region displaced from the region of the opening (24b) toward the light source, and a reflection mirror (31; 71) for deflecting the light entering through the opening (24b) toward the photometer (60). The reflection mirror (71) is switchable between a first position for deflecting the light entering through the opening (24b) toward the photometer (60), and a second position for covering the opening (24b).

Abstract: An intensity of light emitted from a lamp is passed through a mirror tunnel and is directed to a disk which comprises three, B, G, and R, color filters, each extending 120 degrees on the disk. Each of the B, G, and R modes of light, separated on the disk, is guided through the optical fiber bundle and is transmitted to the PLZT elements. A pattern of the PLZT elements, determined by a group of dots of exposure data to be printed, are energized by a given voltage in synchronization with the rotation of the disk 13, thus allowing a desired mode or wavelength of light to pass selectively and fall efficiently on the printing paper.

Abstract: An exposure apparatus has a color shifter disk which comprises blue, green and red color filters, formed by dividing the disk into three sectors, and a light shielding member arranged for moving into and out from the light path in synchronization with the rotating movement of the color shifter disk. The light shielding member advances into the light path to interrupt the exposure light when a boundary between two adjacent color filters of the color shifter disk moves into the light path, and retracts from the light path to pass the exposure light when the boundary between two adjacent color filters of the color shifter disk departs from the light path.

Abstract: The improved method of determining the proper amount of exposure comprises the steps of reading the entire portion of an original image, calculating the characteristic quantities of a principal image in the original image, determining a particular density range from the calculated characteristic quantities of the principal image, extracting only the pixels in said particular density range from the entire portion of the original image to determine the characteristic quantities of the original image, and determining the proper amount of exposure from said characteristic quantities of the original image. When applied to various types of optical image forming apparatus such as copiers, printers and pictographic devices, the method can determine the proper amount of exposure by a simple scanning procedure even if the original to be duplicated is a negative film or other medium having density failure and it hence ensures the formation of the proper and high-quality image in a consistent manner.

Abstract: In an image reproducing apparatus, an image recorded on a negative film is subjected to optical measurement by an optical measuring device. The data obtained by the optical measurement is stored in a photometric data memory for each type of film which is judged by a DX code reader and a film type detecting device. In the apparatus, a difference in characteristics between a reference film and the negative film is calculated by a film characteristic difference calculating device, and the image characteristic amount of the image is calculated by an image characteristic amount calculating device. In a film type correction amount calculating device, a correction value is calculated based on the calculated difference in the film characteristics and the image characteristic amount to compensate for a decrease in the quality of the printed image due to the difference in the film characteristics.

Abstract: An image pick-up apparatus includes, an image pickup device having a plurality of pixels disposed with a predetermined distance therebetween to pick up an image on a photographic original with respect to a plurality of colors; an image forming device having an optical axis, to form the image of the photographic original onto the image pickup device; a pixel shifting device to shift a focal point of the image on the image pickup device by a distance shorter than a distance between the pixels of the image pickup device; a plurality of color filters having a plurality of colors different from each other; and a filter selector to select a color filter from the plurality of color filters and for disposing the color filter between the photographic original and the image pickup device.

Abstract: The present invention provides an apparatus capable of controlling the duration of voltages applied to line exposure elements in proportion to the gray levels of a color to produce a gentle gradation of the color. This is achieved in the present invention by converting exposure data into compensated exposure data in which the duration of the exposure operation is compensated according to predetermined characteristics. The duration of the exposure operation of the exposure device is then controlled according to the compensated exposure data to thereby produce a smooth, high quality gradation of color.

Abstract: A method of correcting the light amount irregularities for a photographic printer in which an image displayed on a two-dimensional display unit is exposed by transmitting or reflecting the light from a light source through or from the two-dimensional display unit is disclosed. An LED light source is turned on with a predetermined driving voltage applied to all the pixels of a liquid crystal panel. The image on the liquid crystal panel is exposed for a predetermined length of time by the light transmitted through the liquid crystal panel and developed thereby to produce a photographic print. The density at a point corresponding to each pixel of the liquid crystal panel is measured. The light transmittance correction amount for each pixel of the liquid crystal panel is determined in such a manner that the density measured at each point conforms to a predetermined reference density (a minimum value of density measurement, for example).