Abstract: An image size converter includes X1 through X4 value generators for respectively generating X1 through X4 values of an image size, first through fourth adders each of which receives a corresponding one of the X1 through X4 values from the X1 through X4 generators at one input thereof, a register for storing at least a decimal part of the said fourth adder and supplying the decimal part to the other input of each of said first through fourth adders, first through third exclusive ORs for detecting noncoincidence between at least the least significant bits of the integer parts of the sums from the second through fourth adders and of the first through third adders, and a size conversion data generator for receiving an image size conversion object dot pattern input in units of 4 bits and determining correspondence between the 4-bit input dot pattern and the first through 4-bit output dot patterns on the basis of the least significant bit of the integer part of the sum of the first adder, and a detection result of

Abstract: A still image trimming apparatus is disclosed which is capable of automatically creating a video signal representing a still image within an area set by a trimming frame while displaying, on a monitor device, a combined image comprising a still image in a photographic or similar print and the trimming frame for setting the trimming area superimposed on the still image. Also, in the still image trimming apparatus, in trimming and recording onto a recording medium, the divisional images of a still image corresponding to the structure of a multi-screen comprising a plurality of display screen arranged from a plane manner, without cutting a still image recorded from a photographic or a similar print into equal parts, the still image can be trimmed to correspond with the structure of the multi-screen device while monitoring a multi-image on the screen of the monitor device.

Abstract: An image reading arrangement provided with an optical magnifying device and an electrical magnifying device which is so arranged that, in the case where the designated reading range can not be read by the designated magnification, even if the magnification is that which can be covered by the optical magnifying, the electrical magnifying device is also utilized for improved operability.

Abstract: An image processing apparatus includes an image generator, a processor for trimming an image generated by the image generator and a reproducer for outputting a plurality of printouts of different images by repeating the trimming by the processor without manually entering trimming data.

Abstract: In a method and an apparatus for processing an image, a small screen dot pattern is prepared. A large screen dot pattern is generated by copying or repeatedly reading out the small screen dot pattern. Data of a variable tone image are processed with the large screen dot pattern and are thereby converted into processed image data representative of a screen dot image. The screen dot image may be recorded in a suitable way.

Abstract: Disclosed is an apparatus for enlarging or reducing an image pattern, wherein the image pattern and a pair of parallel image sensors are moved relative to each other to read the image pattern, the size of the image pattern along the moving direction is calculated on the basis of an output from one image sensor, a read clock frequency of the other image sensor is controlled on the calculated size of the image pattern, and thus enlargement or reduction of the image pattern along the moving direction can be easily performed.

Abstract: An image processing apparatus capable of detecting (1) the size or position of the original on the table, and/or (2) the size or position of an information portion of the original. The apparatus includes an original supporting table for supporting an original. The original has an information portion and a non-information portion. Reading apparatus is provided for reading an area of the table including the original placed on the table, and for generating image data corresponding to the read area and the read original. First detector circuitry is included for detecting the position or size of the original on the table based on the image data from the reading apparatus. Second detector circuitry is included for detecting the position or the size of the information portion of the original based on the image data from the reading apparatus.

Abstract: An image reading apparatus which has position deviated line sensors. The line sensors are formed by charge coupled devices which are arranged in two staggered rows. The signal from one of the charge coupled devices is delayed for a predetermined period corresponding to the distance between the rows, the speed of scanning and the reading density of the original. An actual timing deviation is calculated to delay one signal relative to the other so that the two signals will be output at the same time.

Abstract: When an original comprised of a plurality of areas different half tone images is read, any one of the areas is designated at first. A magnification rate of projection for eliminating moire pattern is set and the image of the original is projected on the image sensor at this magnification rate to be converted into electrical data. The electrical data is electrically reduced at a reducing magnification rate which is in correspondence with the magnification rate of projection. Among the reduced electrical data, only those for the designated area are half tone processed and outputted, and the image of that area is printed on a paper. Thereafter, designation of other areas is carried out and the electrical data is outputted by similar processing. The images of these areas are printed on the same paper, whereby all images of the original are formed on the paper without moire pattern.

Abstract: A multi-copy system for a digital copier includes store means for storing data which are provided by one main scanning. The data stored in the store means are produced a plurality of times within a period of time of one main scanning to provide a multi-copy. Different types of lines such as phantom lines, solid lines and similar borders may be generated between the multiple copies.

Abstract: A data processing apparatus has a function capable of setting different vertical and horizontal magnifications. Data corresponding to an image input by a scanner is temporarily stored in a page memory. The data stored in the page memory is read out by a central processing unit (CPU), and is enlarged/reduced at predetermined conversion ratios in X and Y directions by an enlarge/reduction circuit. The enlarged/reduced data is temporarily stored in a display memory, and is displayed on a cathode-ray tube (CRT) display by the CPU. When the conversion ratios in the X and Y directions are selected and designated by a keyboard so that the image displayed on the CRT display is enlarged/reduced in at least one of the X and Y directions, the data temporarily stored in the display memory is enlarged/reduced at independent conversion ratios in the X and Y directions by the enlarge/reduction circuit.

Abstract: An image expansion apparatus includes a FIFO-type image memory, writing and reading circuits for the image memory, and a plurality of cascade-connected delay circuits for sequentially delaying image data read out of the FIFO image memory. Image expansion in the main scanning direction is achieved by applying a delay to make the speed at which image data is read out of the FIFO image memory slower than that at which the image data is written in the FIFO image memory. Image expansion in the feed scanning direction is achieved by successively selecting and delivering outputs from delay circuits the number of which is equal to the magnification of the image.

Abstract: An image forming apparatus according to this invention, for example, a digital copying machine, comprises an original scanning section, which includes an exposure lamp for exposing the image of an original, a lens unit which can change an image forming magnification when forming the image of the original exposed by the lamp and mirror unit, a photoelectric converter on which an image corresponding to the original image is formed by the original scanning section and which converts the formed image into an electric signal, a main controller for subjecting the electric signal to a predetermined signal processing to electrically change its magnification, and an image forming section for receiving and subjecting the processed signal to another predetermined signal processing to form an image on a sheet which corresponds to the original image.

Abstract: An image communication apparatus is provided which has various novel fucntions: a function of eliminating locking portions in an image printed with a printer incorporating a so-called separation process; a function of shortening the time required for a multi-copy; a function of selecting a maximum resolution of the apparatus without using the same resolution as used during reading; a function of visualizing reading control data in a memory copy mode; and a function of compulsorily setting the manual reception mode when the apparatus at the automatic reception mode is not prepared for reception.

Abstract: The method according to the present invention enlarges a binary digital image by a method comprising the steps of: storing the rows of the image as a plurality of run end representations, in which a row is represented as a sequence of values giving the white and black run ends; enlarging each row of the image along the horizontal axis by altering the value of each run end representation to achieve enlargement on the horizontal axis by a factor F1; enlarging the image along the vertical axis by interpolating rows between the lines of the partially enlarged image so as to produce enlargement along the vertical axis by a factor F2; storing the enlarged size image generated by the above steps in run end form. An image enlarged by the method of the present invention may be reduced by the simple technique of dividing the image into blocks of pixels and assigning one pixel in a reduced image for each block of pixels in the larger image.

Abstract: An image signal processing apparatus features image signals which are compressed, then stored and expanded to regenerate the original image. The compression and expansion are effected in a ratio determined in consideration of the available memory capacity, so that the signals of an image of a given size can always be stored in a memory of a given capacity, regardless of the content of the image. Also an efficient compression can be achieved by replacing the sequence of image signals.

Abstract: A printing apparatus and a facsimile equipment incorporating the same according to the present invention are constituted as such that, when printing an original of, for example, A3 size by a printer of A4 size, the original read in the subscanning direction at reading is printed in the main scanning direction at printing, and at the same time, the image data in the main scanning direction and subscanning direction are enlarged or reduced respectively for printing so as to bring the length/widthwise ratio of a hard copy thus obtained equal to those of the original, so that when the facsimile including a A4 size printer receives the original of A3 size, the hard copy without distortion can be obtained with the smaller printer as compared with the original.

Abstract: There is an image processing apparatus such as a copying apparatus for processing an input image data. This apparatus comprises: an image scanner such as a CCD to digitally read out the image data from a document; a discriminating unit to discriminate whether the input image data is the halftone image data such as a photograph or single density image data such as characters or symbols; a magnification change unit to change the magnification of the image data; and a smoothing unit to smooth the image data in the case where the discriminating unit decides that the input image data is the halftone image data when the magnification change unit performs the magnification changing process. The discriminating unit executes the above discrimination on the basis of the density levels of or density difference between a target pixel and its peripheral pixels in the input image data. With this apparatus, the magnification of the halftone image can be smoothly changed.

Abstract: An apparatus for recording an image on a record medium includes an image forming device which operates in a plurality of record modes, and a control device for determining the record mode to be used on the basis of inputted page direction information and inputted print direction information.

Abstract: Method and apparatus for the selective scaling, such as magnification and reduction, of video images stored as collections of image pels in a video memory. A lookup table is provided for determination of the values of the scaled image pels. A framing matrix of unscaled image pels is established for each scaled image pel. The framing matrix for the scaled image pels determines the outputs read out of the lookup table, and derivatively, determines the values of the scaled image pels. The scaled image pels are stored in the video memory for subsequent display or processing.

Abstract: An image scanning apparatus including a scanning optical system, an image sensor for converting an image beam received from the scanning optical system into an electric signal, and a projecting lens disposed on an optical path between the scanning optical system and the image sensor. The projecting lens is movable along the optical axis for varying projecting magnification. A swing mirror is additionally provided on the optical path between the scanning optical system and the projecting lens. When in an operative position, the swing mirror intercepts the optical path and establishes a shorter optical path for use in obtaining the image of a film or the like in super-magnification.

Abstract: An image processing system includes a density magnification processing unit for taking an average in density of two adjacent image data only at a point of change in the main scanning direction in a size enlargement mode. Thus, the density variation in the main scanning direction is made smoother.

Abstract: The magnification ratio of image information carried on an original is changed for reproduction at a desired magnification ratio. The size of the image information is reduced or enlarged to a prescribed size by an optical system. Thereafter, the image information is photoelectrically converted by a light sensor. The photoelectrically converted image information is selectively picked up or data between adjacent items of the photoelectrically converted image information is determined by interpolation, thereby obtaining image information at a desired size.

Abstract: A copier comprises an original table for placing thereon an original sheet, a sub-scanning unit including an image reading sensor for reading an image on the original sheet and for scanning the original sheet on the original table, a printing unit which prints the image read by the image reading sensor on a printing sheet, and a control unit which controls the operation of the sub-scanning unit by selectively using a position profile control and a speed profile control. The operation start position and operation starting timing control of the sub-scanning unit using the position profile control permits high-speed continuous repetitive copying and high-accuracy enlargement, reduction, and transfer copying.

Abstract: An image signal processing apparatus may include a line sensor for photoelectrically reading an original image and outputting an image signal, a rotary encoder for setting reproduction magnifications of the original image, an edge emphasis circuit for performing edge emphasis processing for the image signal output from the line sensor, and W- and R-address counters and first and second clock cotnrol signals, all of which cooperate to control a degree of edge emphasis performed by the edge emphasis circuit in accordance with the reproduction magnification set by the rotary encoder. The magnification can preferably be set independently for the main scanning and the sub-scanning directions. A correction signal is used in the edge emphasis processing, and is preferably formed on the basis of image signals of pixels near the particular pixel of interest. The image signal may also be smoothed after edge emphasis.

Abstract: A video signal processing apparatus comprising: an oscillator for generating a frequency signal for sampling a video signal, the oscillator permitting its oscillating frequency to be varied; a sampler for sampling the video signal by the frequency signal; and an instructing circuit for instructing a charge in the number of samples in one frame taken by the sampler, wherein the oscillator changes the oscillating frequency in accordance with the instruction.

Abstract: An image recording apparatus wherein image information is developed by converting the image information into an optical signal and by writing the image information on a drum-shaped image retainer with the converted optical signal to provide latent images and by developing the latent images, which are then recorded. A first writing timing is set in a first writing direction with respect to the image retainer and a second writing timing is set in a second writing direction with respect to the image retainer and the number of rotations with respect to the image retainer is calculated in accordance with the settings of the writing timings. The image information is overwritten by a number of times corresponding to the number of rotations to provide a plurality of images which may be entirely or partially or not superposed on one another.