Abstract: An apparatus for printing photographic prints has a negative exposing section, including a light source, an optical light filter system forming a beam of light along a path, a film transporting system for passing the negative film to be printed through the optical path of the light system, and a lens for projecting the virtual image to be printed onto the printing paper. A mirror is pivoted along one of its edges so that it can be raised into the light path to selectively reflect the light from the light source to a color analyzing system and optionally to a densitometer system. The color analysis system as positioned ahead of the negative printing station along the negative film transport path. The mirror is controlled to transmit light through the negative film when printing is taking place and to deflect all of the light to the color analysis and densitometer systems when printing is not taking place.

Abstract: Originals to be copied are scanned spectral photometrically by regions and from the spectral values obtained thereby, color extract values adapted to the spectral sensitivity variations of the copy material are formed by electronic or computer filtering. The color extract values are then evaluated for the determination of the necessary amounts of copying light. The spectral values are simultaneously used for image analysis and additional control of the exposure. The process avoids expensive optical filters and makes an image analysis which yields a greater amount of information, and thus a more extact determination of the amounts of copying light, possible.

Abstract: An image forming apparatus with a media cartridge that accommodates a roll of a light receiving sheet, a leader sheet for automatic loading being connected to the leading edge of said light receiving sheet, wherein said apparatus comprises: sensitivity information recording means, provided on the leader sheet, for recording information relating to the sensitivity of the light receiving sheet for the formation of a full color image; a sensitivity information sensor to read the sensitivity information recorded on the sensitivity information recording means; and a color correcting means for correcting colors according to the sensitivity information read by the sensitivity information sensor.

Abstract: A filmstrip containing a series of images is conveyed along a path which passes by a copying station and a scanning station. The filmstrip is advanced in steps using transporting rolls and a narrow segment of the filmstrip is scanned at the scanning station after every step. A first set of measurements obtained upon scanning of the filmstrip is used to calculate the amounts of light and the exposure times required to properly reproduce the images. A second set of measurements is used to detect characteristic regions of the filmstrip having abrupt changes in density. The positions of the characteristic regions along the filmstrip are established by a counter which counts the steps undergone by the filmstrip and the measurement or measurements corresponding to each characteristic region are stored together with the respective position. The positions of the characteristic regions and the second set of measurements are used to calculate the positions of the images along the filmstrip.

Abstract: An image forming apparatus of a type using a light receiving sheet coated with pressure-rupturable microcapsules encapsulating a colorless dye and a radiation-curable material is provided not only with a supplementary exposure device with which the sheet may be supplementarily exposed to light so as to have its radiation-curability characteristics corrected but also with an input device through which a command can be inputted whether or not the sheet should be supplementarily exposed and a driving mechanism which drives or does not drive the supplementary exposure device, depending on the command from the input means.

Abstract: A second exposure device is used to annotate color images produced by an electrophotographic printer. The exposure level and position of the annotation are chosen based on the color density content of the image.

Abstract: A color photographic printing method of printing a film on the basis of the printing condition of a reference film type, comprises comparing the film characteristic of the reference film type with the film characteristic of the type of a film to be printed and correcting the printing condition of the reference film type on the basis of the result of this comparison. Accordingly, the proper printing condition of each type of film to be printed can be obtained from the printing condition of a single reference film type.

Abstract: A color film analyzing method and apparatus which displays image data of frames of the film as positive images provided by a TV camera, and a plurality of reference images previously provided and stored in a recording member, in a matrix pattern on an image display device. When one of the color images of the picture frames is specified, the image line of the matrix including the specified image is shifted so that the specified image is adjacent to the reference image line on the image display device and a cursor image is displayed overlapping a portion of the specified image. The cursor image is provided as a reversed image of the part of the specified image where the specified image is overlapped by the cursor image. If the reversed image has a color identical or similar to the portion of the specified image surrounding the cursor image, the cursor image is colored differently.

Abstract: In a color-image copying apparatus, a light source emits light to shine upon an original. An optical system utilizes the light with which the original is illuminated, for copying color image information on the original, onto a recording medium. The light source includes an electron gun emitting an electron beam, a controller for controlling intensity of the electron beam emitted by the electron gun, a deflector for deflecting the electron beam emitted by the electron gun, and a fluorescent portion irradiated with the electron beam deflected by the deflector, for emitting a plurality of fluorescence-luminescing colors.

Abstract: A rotatable disc is provided, for use in a photographic printer, supporting both scanning and large area transmissive filters. The disc is used to selective position a scanning or large area filter between a photographic negative and a single light sensor. The disc thus permits the single light sensor to be used to measure both the scanned and large area transmissive characteristics of the photographic negative.

Abstract: A method is taught for automatically adjusting the balance coefficients of printer exposure determination algorithms based on an examination of the corrections made by the operator when reprinting negatives from unsatisfactory prints. The adjustment is based on the average correction and the standard deviation of the corrections made to each balance coefficient of the exposure determination equation.

Abstract: A photometer for a reproduction machine in which the light reflected from a document, illuminated with light through a slit, is condensed by a condensing lens, the condensed light is diffused by a diffusion plate, and then the diffused light is detected by a plurality of sensors for a photometric test. The sensors are arranged along the width of an image of the document formed through the slit. Therefore, a reliable photometric test can be made even on such a document which has different colors on opposite sides of the intermediate portion of the slit along its length.

Abstract: According to a method and apparatus for processing an image, density data representing a density of each pixel of original image data and color data representing a color of each pixel are generated. The density and color data are generated as parallel data. A write mode of a memory is set. A memory content is repeated updated in correspondence with the density data and the color data. A read mode of the memory is set. A memory content corresponding to one of the color data is externally read out. Threshold values are set in units of color data on the basis of the memory content read out from the memory. Recording density data having a smaller number of bits is formed by the set threshold values on the basis of the density data. Recording is performed on the basis of the formed recording density data.

Abstract: A color correction method applicable to a digital processing type of color copier, whereby a set of color patches of respectively different sample colors is printed using a set of printing data values, the color patches are then scanned and analyzed to obtain color patch input data values by the color copier, and each of all of the possible input color data values that can be produced by the scanner/analyzer section of the color copier is then related to one of the color patch input data values which is closest thereto in a 3-dimensional color space. Each of these possible input color data values is thereby related to an appropriate color printing value, whereby a color correction table can be generated which provides correction accuracy that is independent of non-linearity of color printing characteristics.

Abstract: A method and apparatus for color correction while exposing a photosensitive material are disclosed. The material comprises a supportive substrate which is at least partially transmissive and has a layer of microcapsules on the surface thereof. The microcapsules contain a color precursor and a photohardenable or photosoftenable composition. The substrate is positioned on or near a reflective surface having greater reflectivity within a selected wavelength band. An exposure beam is directed onto the substrate, whereby at least a portion of the beam passes through the substrate to the reflective surface. Since the surface reflects a greater portion of the light within the selected band, color correction is achieved.

Abstract: An image forming method which enables switching between a frame sequential system and a dot sequential system, thereby providing a color recording system of reduced cost and which is capable of an increased speed of recording operation. Three separate light-emitting elements are provided emitting light in three primary colors. Simultaneous three-color exposure or sequential monochromatic exposure of a photosensitive material is selected in reseponse to a three-color light signal derived from an original document or the like, and the light-emitting elements are then driven either simultaneously or separately.

Abstract: In a photo-sensitive recording medium cartridge comprising a housing and a photo-sensitive recording medium accommodated therein, information is provided on an outer surface of a peripheral wall of the housing. The information contains data capable of being automatically read out. The data is representative of exposure, developing and fixing conditions of the recording medium. An image recording apparatus comprises a reader unit for reading out the data contained in the information to generate signals respectively indicative of the exposure, developing and fixing conditions, and a control unit operative in response to the signals for controlling an exposure unit, a developing unit and a fixing unit.

Abstract: A photographic printing tape puncher for recording, on a paper tape, information on exposure correction for each of image frames formed on an original picture film before the film is used to perform printing. A frame number reading means reads bar codes which represent frame numbers and which are recorded on a part of the original picture film. The information thereby read is recorded on the paper tape along with items of information on exposure correction for the corresponding image frames. The items of exposure correction information and the frame numbers relating to the image frames are recorded on the paper tape constantly in correspondence with each other. It is therefore possible to easily obtain desired exposure correction information by searching a corresponding image frame number on the paper tape.

Abstract: A photographic printer has a black-and-white CRT which is used as a light source for illuminating an original film with a flying light spot when making a print of a frame of the original film in a three color frame sequential exposure. While making prints of the respective frames of the original film, image signals are stored in a memory by color on a frame by frame basis. The image signals are read out from the memory after every predetermined number of frames, and are electrically processed to provide composite video image signals which are displayed on a CRT as an inlaid composite video image of the predetermined number of frames to which a photographic paper is exposed. A mirror, which may be either a half or a full mirror, is provided to reflect the flying spot light passed through the original film to a light detecting device from which output signals are transmitted to the memory.

Abstract: A photographic printing apparatus is provided with at least two illumination lamps selectively placed in a printing path for printing an image of an original on a photographic material and a lamp detector for detecting which illumination lamp is in the printing path, and then sending a signal to a controller. The controller excites the lamp detected in the printing path and designates a data channel of a memory corresponding to the detected lamp in order to read out lamp data such as a lamp slope coefficient and lamp balance therefrom and then determine an exposure time. The lamp detector effects the detection of the lamp and generates a signal when the lamp in use is broken and is replaced with a spare.

Abstract: A photographic printing system equipped with an analyzer for displaying on a CRT an image equivalent to that of the print and a plurality of enlargers for performing printing based upon data obtained by means of the analyzer. In the analyzer, the data displayed on the CRT are transduced into printing condition data for each enlarger and stored on a storage medium for each of the enlargers so that an optimum print may be obtained at each of the enlargers. The enlargers select the corresponding printing condition data from the storage medium and perform printing. The data displayed on the CRT are transduced into the printing condition data for each of the enlargers, so that the same print can be obtained even when printing is performed based upon the same data displayed on the CRT using a plurality of enlargers with different exposure systems.

Abstract: The factors necessary for controlling photographic systems involve the photographic characteristics such as developing process characteristics which are subject to complicated interaction among various factors. Since it is difficult to measure and control such variable factor independently, situations involving such variations are preferably grasped comprehensively by a small number of criteria or values and controlled with a small number of values having high correlation with the variations. When gray image of an original film is photometrically measured at printing in three primary colors, the image densities in the colors are not uniform even with the same exposure and image density ratio is not uniform, either. This invention method enables optimum control of the photographic system by estimating the current photographic characteristics with the data up until the current spot, and further enables normalization of measured data at a high precision.

Abstract: In a process and apparatus for the production of photographic images of transparent masters, the master is reproduced in a first beam path by means of a light source and optical means on photographic material, and in a second beam path for color and contrast correction by means of a CRT controlled by image measuring means and a computer unit as a mask in a coincident manner. The mask is produced by a feedback loop formed by the CRT, master, image measuring unit, computer unit and again the CRT, whereby in particular the geometric image distortions of the CRT are eliminated. In each location of the screen of the CRT, in which the light point is present, the brightness of the image point is calculated and immediately corrected. By the above described measures the effect of any distortion of the CRT is coupled out, whereby a sharper image is obtained. The part of the light of the CRT used for exposure is not weakened by the master. The process is intended primarily for the photographic copying of color slides.

Abstract: Light containing blue, green and red radiation is passed through a colored original which is to be printed on color copy material. The transmitted light is spread out into a color spectrum which extends across a first wavelength range generally corresponding to the blue portion of the spectrum, a second wavelength range generally corresponding to the green portion of the spectrum and a third wavelength range generally corresponding to the red portion of the spectrum. The intensity of the transmitted light is measured throughout the spectrum and average of the resulting raw intensities are taken oer each of a series of wavelength intervals which are much shorter than the first, second and third ranges. The copy material has a gamma value for each wavelength interval and such gamma value represents the spectral sensitivity of the copy material in the corresponding interval. The average intensity for each wavelength interval is multiplied by the respective gamma value to yield a corrected intensity.

Abstract: A simulator for automatic color photographic printers which are adapted to print an image recorded on a film on a sheet of printing paper as a final print. Said image is picked up by an image sensor and displayed on a CRT as an image that is identical with the final print. The simulator includes a gamma correction circuit which processes the output signals from the image sensor without transducing them logarithmically, performing gamma correction such that the total gamma of said CRT and the output signals of said gamma correction circuit is made equal substantially equal to the gamma of the printing paper, whereby the image simulated can be displayed on the CRT with a high accuracy without deterioration of the image signals detected by the image sensor.

Abstract: A method of setting the copying conditions of a color copying machine includes the steps of scanning a test chart having density patterns in three primary colors, to detect three color components of the light reflected from the test chart, based on which three color exposures are obtained. The test chart is scanned again to make a color copy thereof, and the color copy is scanned to detect three color components of the light reflected therefrom, based on which three color densities are obtained. Relationships between the three color exposures and the three color densities are obtained for the three colors. Based on the relationships, three primary color filters are adjusted to regulate three color components of the light passed therethrough, thereby controlling three color exposures.

Abstract: There is disclosed herein a diffusing device for use with photographic darkroom color analyzers when no gray card appears in any of the frames on the strip of film which have the same lighting conditions as the frame to be analyzed. The diffuser is used for determining correct color balance of an area of film which is mottled, such as human skin, by eliminating moles, freckles, dark shadows etc. from the image being analyzed with light blockers. The diffuser is made of flat translucent material in a plurality of shapes. Supports hold it above the analyzer sensor. The invention includes a variety of light blockers of various shapes made of opaque material such as sheet metal, all light blockers having the same area. A diffuser of an appropriate shape is placed within the projected image to be analyzed and moved around until it is within an area of flesh selected to be analyzed.

Abstract: Data regarding color photographic images are detected with respect to three primary colors (red, green and blue) by receiving transmitted light through a color original film or light reflected thereon with respect to the three colors by an image sensor and detecting the image data of the original film with respect to the picture elements obtained by dividing the whole picture surface of the film. In this method, the image data is corrected in accordance with a manner in which image data of a reference film corresponding to the original film with respect to three primary colors is detected respectively by the image sensor and the thus detected data is preliminarily stored in the memory unit as calibration data. In connection with the calibration data, the image data of the original film is operated upon and processed every time that the image data of the original film is detected by the image sensor, whereby corrected image data is obtained.

Abstract: An image reading apparatus for reading a transparent film has a light source, an exchangeable adjusting board corresponding to the transmission factor of the film, an imaging device for receiving and imaging the light passing through the adjusting board and the film, a comparison function for detecting the output of the imaging device and comparing the output of the imaging device with a predetermined output level, a control device for outputting power source control signals in response to the output of the comparison device, and a power source for energizing the light source in response to the power source control signals. Whereby, the adjusting board is imaged before the film is imaged by the imaging device, and in case the light amount of the light source is not adequate for the film, the extent of energizing the light source is adjusted for adequately imaging the film.

Abstract: An exposure device for a color copying apparatus having a filter holding frame mounting a filter plate provided with color filter layers and a transparent section and a pair of aperture plates for forming a variable aperture. The filter holding frame is movable in a first direction perpendicular to an exposure light path to selectively place the filter layer and transparent section into the exposure light path. The aperture plates are movable toward and away from each other in a direction perpendicular to the first direction and to the exposure light path so as to vary the size of aperture formed therebetween. Between the filter holding frame and the pair of aperture plates there is a mechanism comprising pins and cam grooves for relative movement of the filter holding frame and the aperture plates.

Abstract: In a method of producing additional prints, detection is made as to data relative to an image on an original-image film and data relative to an image printed on a printed sheet of photographic paper from the original-image film. On the basis of the above-mentioned data, arithmetic operations are performed upon the amount of exposure required for printing the image on the photographic paper from the orignal-image film. On the basis of the results of the arithmetic operations, exposure control relative to the printing is performed to finish the color characteristics of an image to be reprinted on the photographic paper so that the color characterisitcs may be made substantially the same as the color characteristics of the image printed on the printed sheet.

Abstract: In photographic printing systems, it is necessary to detect image information of an original film to determine printing exposure amount for optimum prints. When an image sensor is used as a detector or for detecting image information, the detection area in the image sensor should correspond exactly with the detected area on the film. Particularly, when images are measured by separation into three colors of RGB (Red, Green, Blue), color registration among RGB should be attained. Image information can be automatically and accurately detected and processed without needing mechanical positional adjustment of the image sensor(s).

Abstract: Disclosed is a picture forming apparatus in which exposure is performed onto a photosensitive medium in accordance with picture information through a light-transmissible medium provided with dot information, the apparatus comprising selectively exposing means for performing the exposure onto a photosensitive medium through a selected one of a plurality of previously prepared light-transmissible media different in dot information from one another, and exposure condition setting means for setting conditions of the exposure in accordance with the dot information of the selected one light-transmissible medium.

Abstract: A color scanner for converting color data of a color original (e.g., a photographic film) into an electrical signal, includes a level comparator for discriminating the type of film (e.g., color negative vs. color positive, color vs. monochrome, type of color negative) in accordance with output signals, e.g., color component signals, from a sensor (i.e., based on a light transmittance of an unexposed portion of the film). The output from the level comparator is supplied to an accumulation time control block through a register, a selector, and the like. The accumulation time control block corrects the electrical signal based on the discrimination result from the level comparator irrespective of the type of film, so that an accumulation time of the sensor is changed by changing a bias voltage applied thereto.

Abstract: A color zoom copying apparatus is provided having a slide base which holds one lens group comprising part of a zoom lens system, and which can move in the optical axis direction of the zoom lens system. The apparatus includes structure for driving the slide base along the optical axis direction in accordance with the magnification of the zoom lens system, a movable lens frame which supports another lens group of the zoom lens system and which is supported on the slide base so as to move in the optical axis direction, and a first adjusting device for moving the movable lens frame relative to the slide base in order to correct deviations in the focus of the zoom lens system which occur as a result of variations in magnification, in accordance with displacement of the slide base.

Abstract: A method is provided for determining the exposure of a photographic negative to be printed in a cropped, enlarged format. The method is performed by defining a region of the negative to be printed, measuring selected density characteristics of the negative in only that region, and determining the exposure based on those measured density characteristics. The method is implemented in an enlarging photographic printer including means for defining the region of the negative to be printed, and means for measuring the selected density characteristics of the negative only in that region. Means are provided for using the selected density characteristics to calculate an exposure for the negative region, and for exposing the negative region onto photographic paper in accordance with the calculated exposure.

Abstract: An exposure determining device detects densities of a number of picture elements of a color original and displays an image of the color original on a color monitor. A part of a principal subject image of the color original is specified on the color monitor. Based on the measured color density of the specified part, picture elements by which the principal subject image is formed are detected to determine a principal subject image area. By using the detected densities of picture elements included in the prinipal subject image area, at least one image characteristic value is calculated and is used with one of a plurality of previously provided exposure calculating formulas selected according to scenes into which principal subject images are classified, in order to determine the proper exposure for reproducing color images of proper color balance and density.

Abstract: A radiation-sensitive element for half tone color proofing adapted to be exposed by scanning with four independently modulated sources of radiation emitting at different wavelengths within the range 550 to 900 nm, the element comprising a substrate bearing at least four separate imaging media coated thereon, said imaging media including:(1) an imaging medium capable of forming a yellow image upon imagewise exposure and processing,(2) an imaging medium capable of forming a magenta image upon imagewise exposure and processing,(3) an imaging medium capable of forming a cyan image upon imagewise exposure and processing, and(4) an imaging medium capable of forming a black or a balancing black image upon imagewise exposure and processing,each imaging medium having a maximum spectral sensitivity at a wavelength different from that of the maximum sensitivity of the other imaging media such that after exposure and processing super-imposed yellow, magenta, cyan and black or balancing black images are formed, each image

Abstract: An automatic photographic printing apparatus for printing an image in a negative color film on a photographic paper and having a simulator for displaying this image as a positive image comprises an imaging device for imaging the negative film, a display device for displaying the positive image, and an image information processing unit for matching the coloring characteristics of the photographic paper and of the display device.A method of adjusting the simulator comprises the steps of imaging a standard negative film using the imaging device and adjusting the outputs of the imaging device such that they correspond to the density of the standard negative film.

Abstract: A method for setting and managing photographic printing conditions of a printing system in which an exposure is carries out in several times on a recording paper with respect to respective monocolors (R, G and B) to prepare a reference image consisting of a plurality of areas having different densities. The densitites of the three respective colors of the reference image are measured and the thus measured density data is then stored, and an amount of exposure necessary for obtaining predetermined densities regarding the three colors from a preliminarily prepared relationship between the exposure amount and the densities regarding the respective three colors is then obtained. In accordance with the thus obtained amount of exposure, the exposure conditions for the respective three colors are set or corrected.

Abstract: In a method of producing reprints, detection is made as to data relative to an image on an original-image film, data relative to an image printed on a printed sheet of photographic paper from the original-image film and correction data representative of desired corrections to be applied to the color characteristics of the image printed on the printed sheet. On the basis of the above-mentioned data, arithmetic operations are performed upon the amount of exposure required for printing the image on the photographic paper from the original-image film. On the basis of the results of the arithmetic operations, exposure control relative to the printing is performed to finish the color characteristics of the image to be reprinted on the photographic paper so that the color characteristics includes the desired corrections applied to the color characteristics.

Abstract: When a number of prints of an image frame are made at a time or different times for the multiple printing, test printing, or re-printing thereof, it is needed to have them printed under the same condition and mode. However, it has been difficult to produce them without a deviation or variation of densities even when the same selected image frame is printed, because the photometric measurement of the image frame has been made conventionally before each time of printing for the operation and determination thereby of an exposure amount under which the printing is made, and because such photometric measurement at each time of printing gives an exposure amount which is slightly different at each time. In this invention, photometric data of a specific image frame which has been printed once are memorized, and when the specific image frame is to be printed once again, the frame is printed always at an entirely constant density on the basis of the data memorized and read-out at each succeeding printing.

Abstract: A color negative inspection apparatus includes at least one color image display device which displays a plurality of color positive images of a single frame of a color negative film for inspection, one of the plurality of color positive images being displayed through simulation for a standardized printing exposure condition of a printing apparatus to which the color negative film is fed upon printing and the remaining through automatic simulation for at least one of color and density corrections stepwise over or under in respect to the one of the plurality of color positive images. If there is no color positive images corrected suitably for printing, the one of the plurality of color images is manually corrected in color and density and thereby the remaining are correspondingly corrected for inspection.

Abstract: A light level meter composed of a fiber optic cable having a light receptor end coupled to a conventional light meter is used for measuring illumination levels in spatially limited locations. By the method of the invention, a reference camera is calibrated for proper exposure settings using a series of test exposures. A light level reading is then taken using the fiber optic cable coupled light level at a location preferably near the camera lens. Identical secondary cameras are adjusted to have the same exposure settings as the reference camera, and the illumination for the secondary cameras is adjusted to match that of the reference camera by matching the secondary light level with the reference light level using the fiber optic cable coupled light level meter positioned at the same relative location at the secondary cameras as used for the reference camera.

Abstract: An improved light-exposure control unit for a photographic printer offering minimized leakage problems, elimination of special precision capacitors and a range selecting circuit which eliminates masking of the photosensitive device used to detect variations in intensity of the light source. The improved control unit including operational amplifiers connected to the photosensitive device, which is mounted after the color filter but before the negative, sending a voltage adjustable according to the desired range and proportional to the amount of light impinging thereon, to an integrating amplifier with a variable input resistance adjusted accordingly to the desired density. The integrating amplifiers output is compared to a voltage derived from a precision reference source adjustable according to the settings made to magnification and speed-factor controls.

Abstract: A color copier has a first station for scanning a colored original in each of the primary colors so as to measure the proportions of such colors in the original. The measurements are sent to a computer which calculates the exposure time in each primary color for reproduction of the original. The copier further has a second station for reproducing the original on any one of several different color copy materials. The spectral sensitivities of the copy materials differ for any given primary color so that the copy materials define a family of sensitivity curves in each primary color. An illuminating device is movable between the two stations and generates the light used for scanning as well as for copying. Thus, the scanning light and copy light have the same spectral composition. The illuminating device carries a separate source of light in each primary color and the emission spectrum of each source projects no higher than the lowest curve of the family of sensitivity curves for the corresponding color.

Abstract: A photographic printing apparatus adapted to use a paper magazine having a coded mark indicating the type of a photographic paper contained therein. The code mark is automatically detected, when the paper magazine is mounted on the printing apparatus, by a code mark reader, to judge the paper type according to which the printing apparatus determines the printing conditions and makes a print, thereby to obtain a color print with proper color balance and density.

Abstract: A color negative inspection apparatus which reads color image data from a frame of a color negative film and stores in a memory color image data sequentially read from N frames of the color negative film, N being an integer at least as large as 2. The N color positive images are displayed based on the color image data stored in the memory. The N color positive images correspond to the N frames of the color negative film. The N color positive images are shifted by one frame each time color image data is read from a frame of the color negative film.

Abstract: An improved method of spectrographically measuring density of a strip of photographic negative color film is disclosed. The method includes the steps of concurrently projecting an image of a photographic negative color film, having certain images recorded thereon, on each of a plurality of smaller divisional light beam receiving faces of an image receiving element with the aid of a plurality of projection optical systems. The optical systems include a color separating filter for separating projected light into three primary colors. The method further includes electrically scanning a number of photoelectric converting elements located on each light beam receiving faces, producing an output signal obtained by electrical scanning each face and storing the signal, and measuring relative density, degree of saturation and average density with respect to a part on the photographic negative color film corresponding to each of the light beam receiving face with reference to the stored signals.

Abstract: A photographic printer is provided wherein the density of a negative is measured on the same axis on which and using common optical components with which the negative is subsequently printed. The printer includes apparatus for measuring both the scanned and large area transmissive density of the negative.