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| Number | Title | Issue Date |
| 4614978 | Office communications system An office communications system wherein, for the manipulation and/or transmission of text available in an already printed form, a text converter is connected between a word processing terminal and a telecopier. The text converter includes a classifier mem... | 09/30/1986 |
| 4603431 | Method and apparatus for vectorizing documents and symbol recognition An apparatus codes a scanned document locally representing each graphic element within a prescribed measure of accuracy by a trapezoidal approximation. The invention also includes a method for similarly coding a scanned document. The apparatus determines ... | 07/29/1986 |
| 4578711 | Video data signal digitization and correction system An analog video data signal digitization and correction system scans a medium to produce video data signals representing images printed on the medium. Two reference quantities representing analog reference signals produced by scanning a densely printed im... | 03/25/1986 |
| 4571633 | High-speed facsimile machine capable of parallel processing A facsimile communication machine capable of transmitting and receiving coded picture data is provided. The machine comprises a system control unit including a pair of CPUs, one of which is capable of controlling the reading operation while the machine is... | 02/18/1986 |
| 4562486 | Conversion of multilevel digital data to binary data A system for converting a multilevel video signal into a binary video signal for use in an image processing machine such as a facsimile machine or digital copier includes a threshold setting circuit which first determines average density levels of a prede... | 12/31/1985 |
| 4556916 | Picture image discriminating apparatus A picture image discriminating apparatus which operates for scanning a document and transmitting a picture signal obtained through converting a light signal photoelectrically at every unit reading size of 0.01 mm2 or over to a signal processing... | 12/03/1985 |
| 4555802 | Compaction and decompaction of non-coded information bearing signals Image or character data in the form of a rectangular array of binary 1s and 0s (bits) are divided into a plurality of segments, such as thirty-two by thirty-two bit segments or one bit by eight bit or byte segments. The image data is scanned for identifyi... | 11/26/1985 |
| 4553171 | Tile encoding in image printing A method for digitally printing a digital image by reference to a succession of code words representing blocks of pixels of the original image. The image is originally subdivided into uniform size blocks of pixels. Each of the blocks of pixels is given a ... | 11/12/1985 |
| 4539600 | Image signal processing with a variable threshold An image signal processing apparatus particularly suitable for use in a facsimile system for converting an analog image signal obtained by photoelectrically reading an original into a binary image signal for further processing is provided. The present ima... | 09/03/1985 |
| 4517607 | Method of and apparatus for compensating image in image reproduction system An image compensating method and an apparatus for the same which improves the quality of an image to be reproduced by an image reproduction system. A condition of an observed pixel or object pixel is subjected to MTF compensation to provide clear cut boun... | 05/14/1985 |
| 4499499 | Method for identification and compression of facsimile symbols in text processing systems An improved system for identifying and compacting text data to be transmitted over communications lines and thereby reducing the data volume and transmission time. Transmitting and receiving text processing systems are provided identical library memories ... | 02/12/1985 |
| 4468703 | Image signal processing device An image signal processing device uses an automatically varied threshold value calculated from the average density and the density distribution of an original (document, etc). The threshold value is periodically updated at predetermined intervals, so that... | 08/28/1984 |
| 4459617 | Facsimile reception apparatus A facsimile reception apparatus of a facsimile transceiver processes video data using a microcomputer. When one line of decoded video data are stored in a random access memory of the microcomputer, the video data are transferred to a printing section thro... | 07/10/1984 |
| 4410916 | Dual mode facsimile coding system and method A dual mode facsimile data compression technique which possesses the advantage of symbol recognition and extended run-length coding methods. In operation, a symbol blocking operator isolates digital raster data representing valid alphanumeric characters a... | 10/18/1983 |
| 4408233 | Method and apparatus for accentuating the features of a monochrome image reproduced by means of a digital transcription A method and apparatus for accentuating the features of a monochrome image reproduced by means of a digital transcription. The apparatus includes an analog portion disposed between the digital-to-analog converter DAC (5) and an analog-to-digital converter ... | 10/04/1983 |
| 4400737 | Apparatus for producing and reproducing embedded pattern Apparatus for producing and reproducing embedded patterns in which a character or the like including a pattern which is not observable macroscopically can be differentiated from the other formats microscopically. An input unit reads a normal original imag... | 08/23/1983 |
| 4353096 | Digital facsimile system to band-compress half-tone picture signals A digital facsimile system provides band-compression of half-tone picture signals. Primarily, a plurality of analog signals are derived by successively scanning a picture. Thereafter, the analog signals are converted into digital signals and then the digi... | 10/05/1982 |
| 4321626 | Facsimile apparatus Character codes having underline bits are read out of a memory (22). A character generator (18) generates character video signals in the form of horizontal scan lines corresponding to the codes. A line generator (30) generates line video signals correspon... | 03/23/1982 |
| 4320419 | Image reproduction equipment To record on a single sheet (9) both a picture image and alphanumeric characters, each character to be recorded is stored (24) in the form of signals representing a multi-column pattern of dots which make up that character. Signals derived in synchronism ... | 03/16/1982 |
| 4280144 | Coarse scan/fine print algorithm An apparatus and method for improving the print quality of a coarse scan/fine print image processing device. The apparatus includes an encoder which assigns a code to a coarsely scanned picture element (PEL). The assigned code is representative of the ref... | 07/21/1981 |
| 4261018 | Progressive image transmission An image composed of binary black and white picture elements (pixels) is progressively transmitted over a narrow-band channel after binary values of all pixels have been formatted into a hierarchical structure of subdivisions of successive halvings from t... | 04/07/1981 |
| 4244004 | Method for analog-digital conversion, and a picture reproduction method employing the same A method of analog-digital conversion is disclosed, wherein sub-sampling of an analog signal is performed at a certain multiple n of the basic sampling rate, and wherein from n consecutively-produced values representative of the analog signal the digital ... | 01/06/1981 |
| 4222076 | Progressive image transmission A gray-scale image is progressively transmitted over a narrow-band channel after the gray-scale values of all picture elements (pixels) have been formatted into a hierarchical structure of picture subdivisions of successive sizes from entire image down to... | 09/09/1980 |
| 4222077 | Analog-digital conversion method, and a picture reproduction method using the same A method of analog-digital conversion is disclosed, wherein sub-sampling of an analog signal is performed at a certain multiple n of the basic sampling rate, wherein a discrimination signal including extreme position signals is obtained by detecting the l... | 09/09/1980 |
| 4200769 | Process and arrangement for selectively transmitting predetermined characters or graphic patterns Predetermined characters or graphic patterns are transmitted from a transmitting station to a receiving station in a system wherein a printing head is provided with at least one printing component in the receiving station and is supplied with binary chara... | 04/29/1980 |
| 4188643 | Method and arrangement for correcting errors in facsimile transmission In facsimile transmission the sequences of picture elements having the same luminance are transmitted in coded form. The code words have, in general, different lengths and no ambiguous beginning or end marking respectively. Consequently, in case of a dist... | 02/12/1980 |
| 4155097 | Method and arrangement for the redundancy-reducing coding of pictures With known methods for predictive decorrelation it always applies only to one or more previously scanned elements of the same picture line. A disturbance for a decorrelated value leads on reconstruction to a "falsification" of a longer picture sequence. A... | 05/15/1979 |
| 4151562 | Methods and apparatus for transmitting image data This invention relates to information transmission systems and in one embodiment comprises apparatus and methods for generating facsimile signals that are compatible with devices in general use for sequential printing of alphanumeric characters, whereby t... | 04/24/1979 |
| 4148066 | Interface for enabling continuous high speed row grabbing video display with real time hard copy print out thereof An interface for enabling continuous high speed row grabbing video display with real time hard copy print out thereof interfaces a hard copy printer with a real time frame grabbing video display terminal for enabling substantially instantaneous provision ... | 04/03/1979 |
| 4135213 | Row grabbing video display terminal having local programmable control thereof A real time frame grabbing video display terminal for substantially instantaneously providing a continuous direct video display of a selectable predetermined video frame of informatin on a video display means for continuously receivable information, such ... | 01/16/1979 |
| 4128850 | Method and apparatus for transmitting facsimiles over telephone lines The quality of and/or transmission speed for fingerprint facsimiles transmitted over telephone lines are improved by image enhancement prior to transmission. Image enhancement is achieved by using a multi-element photodetector array and simultaneously pro... | 12/05/1978 |
| 4107457 | Transfer terminal with library phrase memory A data transfer terminal of the type including a keyboard means, a display means and a printer for use in a data center controlled data transfer system. The printer of the data transfer terminal is provided with a library phrase memory. The library phrase... | 08/15/1978 |
| 4084195 | Image data remapping system A system remaps image data generated by successive sweeps of the image by a single transducer element into a format for use by a print head assembly which requires the simultaneous application of plural modulating signals to a plurality of print elements ... | 04/11/1978 |
| 4048657 | Method and apparatus for synchronizing a facsimile transmission A facsimile transmission system is described which includes a transmitter section having an optical sensor driven across a selected document by a variable speed motor controlled by the frequency of an oscillator. The relative movement of the sensor with r... | 09/13/1977 |
| 4032888 | Nonlinear scan drive reader with variable clock correction A mirror driven by a resonant mechanical oscillator is used to scan a laser beam across a document. The incident laser beam line scans the record and is absorbed or reflected depending upon the presence or absence of an image on the record. The reflected ... | 06/28/1977 |
| 4013827 | Process and an arrangement for facsimile coding with address insertion of a specific surface element scanned for transmission limiting fault effectiveness up to the next inserted address In facsimile coding in which the items of information contained on a two-color original consisting of individual surface elements are scanned for transmission, and in which sequence lengths are represented in lines by code words composed of binary charact... | 03/22/1977 |
| 3980809 | Encoding logic for reduced bandwidth pictorial data transmission system The present invention relates to pictorial data transmission systems for transmitting fixed images from one point to another. The invention employs two modes for encoding successive blocks of elements (typically four elements by four elements). If a data ... | 09/14/1976 |
| 3974326 | Facsimile communication system A black and white facsimile communication system wherein the document to be transmitted is scanned line by line, the scanner signals are sampled to obtain pulse sequences having a constant number of pulses for every line. The pulse sequences are converted... | 08/10/1976 |
| 3965290 | Video-to-binary conversion apparatus having moire suppression characteristics Video-to-binary conversion apparatus for use in image reproduction systems and the like to convert an input video signal to an output binary signal and comprising an output data normalizer for normalizing the binary output data signal relative to the inpu... | 06/22/1976 |
