Abstract: Upon receiving a command for changing a forwarding number (Yes in S103), the present facsimile machine 1 receives the forwarding number (S105 -S108), and retains the received forwarding number in the EEPROM 18. Then, the present facsimile machine 1 dials the forwarding facsimile machine (S115). The present facsimile machine 1 prepares a cover page for indicating that the present facsimile machine is put into a condition capable of forwarding incoming image information (S116). The facsimile machine 1 transmits the cover page to the forwarding facsimile machine.

Abstract: There is provided an apparatus for compressing data. The apparatus is constructed from a random access memory (RAM). Next, there is an input controller connected to the RAM. A compression unit and decompression unit are connected to the input controller. There is an output controller connected to the compression and decompression units and the RAM. Finally there is a controller connected to the RAM, the input and output controllers.The controller configures the input controller to retrieve input data from the RAM and transfers the retrieved data to an active unit, the active unit being the compression unit for compressing the original data into the compressed data or the decompression unit for decompressing the compressed data into the original data. Under direction of the controller, the output controller retrieves data from the active unit. Data from the output controller may be transferred to the RAM, to a printer, or just counted to determine the size of the data.

Abstract: An apparatus for and a method of judging a dotted image area using a small-capacity memory. Image data corresponding to one line out of image data representing an original image are stored in a line memory. On the line corresponding to the image data stored in the line memory, a target pixel is successively set along the main scanning direction. Image data corresponding to the target pixel is compared with image data corresponding to pixels around the target pixel. It is judged whether or not the target pixel is a peculiar point pixel on the basis of the result of the comparison. Further, the distance between peculiar point pixels is operated. The operated distance between the peculiar point pixels is referred to a predetermined judgment basis, to judge whether or not a judging area including the finite number of pixels is a dotted image area.

Abstract: An image reading apparatus is formed of a main portion having an image reading function; a driving source provided in the main portion; a reversing device, on which the main portion is detachably mounted; and a driving power transmitting device connected to the driving source. The reversing device has a device to reverse a document fed from the main portion in a state where the main portion is mounted thereto and to return the document back to the main portion. The driving power transmitting device drives the reversing device by transmitting a driving power from the driving source under a condition that the main portion is mounted on the reversing device. Thus, although the reversing device is not provided with a driving source, the reversing device can be actuated.

Abstract: In a digital image forming apparatus, a document image is read as digital data, and an image type of bi-level image or multi-level image is discriminated from the digital data. For a bi-level image, an intensity of laser beam for exposing a photoconductor is modulated according to the image data with a duty ratio of 100%. On the other hand, for a multi-level image such as a photograph image, the intensity of laser beam is modulated with a duty ratio in the unit of two or more dots according to the image data. The duty ratio and the laser output power are changed according to a type of document image or according to sensitivity characteristic of the photoconductor.

Abstract: A facsimile machine includes a phase/amplitude fluctuation detector for quantitatively detecting fluctuation of the phase and amplitude of data received at a modem and a reception speed determiner for determining if the reception is to be continued or not and at which communication speed the data is to be received if reception is to continue, based on the fluctuation values detected at the phase/amplitude fluctuation detection means. The facsimile machine quantitatively detects the fluctuation values of the phase and the amplitude of the signal being received. When the fluctuation values exceed a designated range, even if the bit-pattern of the received data is normal, the facsimile machine starts receiving video information via a one-step reduced communication speed and therefore can accurately receive the video information even if the telephone circuit condition is not good.

Abstract: The present invention provides a combination of first providing a coarse adjustment by varying the emitter power and duration of the emitter/detector exposure time, and then providing a fine adjustment by storing a correction value for each photodetector element. The adjustment for each photodetector corrects not only for the range, but also for the offset, providing two correction values. In a preferred embodiment, the low and high voltage reference levels for an analog to digital converter are adjusted and stored for each photodetector for each color.

Abstract: A document processing system is provided for processing a job having one or more electronic pages with at least one of the electronic pages including a set of pixels defining a halftone image. Each pixel is disposed in one of a first state and a second state, and the set of pixels includes a plurality of dots with each dot including a group of one or more pixels disposed in the first state. The document processing system includes an image examination system for determining whether a first dot and a second dot exist within a selected subset of one of the one or more sets of pixels. When the image examination system determines that the first and second dots exist in the selected subset, the image examination system determines whether the first dot includes more or less pixels disposed in the first state than the second dot.

Abstract: Density data for reproducing an image using the four colors yellow, magenta, cyan and black is based on image data pertaining to chroma, luminosity and hue. The density ratio of two color components, from the three colors yellow, magenta and cyan, is first determined for a given hue. This ratio is then maintained constant while the color value for desired chroma and luminosity is determined. Finally, the density value for black is determined to reproduce a desired color. If the desired color lies outside a reproducible color gamut, a substitute color is chosen which has the same luminosity and hue as the desired color, and the maximum reproducible chroma within the gamut.

Abstract: A method and apparatus for reproducing an original image includes a scanner or other image source for generating digitized raw image data for each pixel of an image. For each pixel, the raw image data is transformed into a rendering gray level value by comparing the raw image data value with threshold values from a threshold mask set. There are various threshold mask sets that may be used in accordance with signals related to a toner particle size.

Abstract: An image transmitting apparatus includes a transmitter capable of transmitting color image information and a memory that stores addresses of a plurality of receiving sides together with respective information indicating, for each stored address, whether the corresponding receiving side has or does not have a color receiving function. The apparatus designates a plurality of destinations from among the plurality of receiving sides whose addresses are stored in the memory and discriminates whether or not each of the designated destinations has the color receiving function in accordance with the information stored in the memory. The apparatus then notifies that at least one of the destinations does not have the color receiving function, in response to the discrimination.

Abstract: An automatic facsimile signal analyzing system includes a switch unit, a service trunk, a signal identification trunk, a facsimile communication determination unit, and a control unit. The signal identification trunk restores a facsimile control signal from a modulated and encoded facsimile signal on the set speech path and performs collection of communication state information and detection of a start of facsimile communication on the basis of the restored facsimile control signal. The facsimile communication determination unit permits an operation of the signal identification trunk when the classification result from the service trunk represents a type other than the voice signal and analyzes the communication state information from the signal identification trunk.

Abstract: A musical instrument amplifier has all solid state amplification stages but incorporates a pair of vacuum tube signal magnitude limiters to provide vacuum tube type sound when the amplifier is operating in a nonlinear condition. The vacuum tubes are connected to have no supply potential so as to minimize microphonics and are each provided with a small amount of reverse bias to provide a desirable shape of the tube conduction curve and space charge suppression.

Abstract: A technique for improving the image quality of facsimile transmissions by actually recovering data corrupted by channel impairments without retransmission. The technique is adaptable to operate with existing facsimile communications standards and does not require modification of transmitter equipment. A significant increase in image quality results. In many cases, otherwise partially illegible documents can be read by applying the image correction technique of the invention.

Abstract: A profile detector in a scanning system measures spacing of an original non-planar image from a reference image plane of the scanning system. The spacing is measured by projecting a spot of light, with a collimated light source, onto a scan line of the original non-planar image at an angle that is oblique with respect to the fast scan direction of the scanning system. A first photosensor converts optical information reflecting off of the original non-planar image at a first slow scan position into electrical profile data. A position along the fast scan direction is identified for the first slow scan position by locating the spot of light in the electrical profile data. The located position is compared with a pre-recorded position along the fast scan direction for the first slow scan position. The pre-recorded position defines a position where the first photosensor would have detected the spot of light if it reflected off of a planar image.

Abstract: A method of and system for rendering a halftone image of a gray scale image by utilizing a pixel-by-pixel comparison of the gray scale image against a blue noise mask is disclosed in which the gray scale image is scanned on a pixel-by-pixel basis and compared on a pixel-by-pixel basis to an array of corresponding data points contained in a blue noise mask stored in a PROM or computer memory in order to produce the desired halftoned image. Both digital and optically implemented halftone methods are disclosed. Application specific modifications of the blue noise mask as well as its use for producing halftoned color images are also disclosed.

Abstract: An original image signal, which represents an original image and is made up of a series of original image signal components representing picture element values of picture elements arrayed at predetermined intervals and in a lattice-like form, is obtained. One of different interpolating operation processes is carried out on the original image signal and in accordance with an image size enlargement scale factor with respect to the original image, which is represented by the original image signal. An interpolation image signal is obtained from the interpolating operation process, which signal is made up of a series of image signal components, which occur at intervals different from those of the original image signal components. The response of an interpolation image, which is reproduced from the interpolation image signal and displayed on an image reproducing apparatus, is kept to be approximately equal to a predetermined level regardless of the image size enlargement scale factor.

Abstract: An averaging circuit for sequentially calculating an average of an original pixel data and a delayed pixel data to output a correction data and a multiplexer for selecting one of the pixel data and the correction data cooperate with each other, under control of a timing generator for generating a control signal, to output a pixel data on a contracted picture with a reduced distortion, permitting use of a relatively small-scale circuit.

Abstract: An apparatus for scanning and digitizing image objects includes a conventional scanning unit for processing individual image objects with the aid of a first electro-optical scanning unit. Furthermore, an optional roll-film unit is provided for processing roll-film objects. The roll-film unit is optionally usable in combination with the conventional scanning unit. The roll-film unit too utilizes at least the first electro-optical scanning unit of the conventional scanner to digitize the roll-film object. The apparatus is especially suited for use for digitizing aerial images in individual image form or in roll-film form in the area of photogrammetry.

Abstract: In an image processing apparatus of the invention, HVC conversion is performed stably. THat is, an image sensor reads image data of red, green and blue of a document, while a memory stores brightness data V of a color patch. When the image data are converted to a brightness data V and color difference data WR and WB, coefficients used in the conversion of the HVC conversion are calculated by an operator based on the image data of red, green and blue of the color patch read by the image sensor and the brightness data V stored in the memory.