Patents
Sitemap › H04 - Electric communication technique › H04N - Pictorial communication, e.g. television › H04N 1 - Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
Patents for H04N 1 - Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof (142,802)
06/1991
06/13/1991DE4035389A1 Modulation system for laser printer - has lighting level monitored and used to to provide correcting action to input
06/12/1991EP0431962A2 Method and apparatus for identification of document skew
06/12/1991EP0431960A2 Identification, characterization, and segmentation of halftone or strippled regions of binary images
06/12/1991EP0431958A2 Identification and segmentation of finely textured and solid regions of binary images
06/12/1991EP0431796A2 A printer for printing video images
06/12/1991EP0431774A2 Scanner with slow scan image context procesing
06/12/1991EP0431603A2 Optical unit for use in laser beam printer or the like
06/12/1991EP0431396A2 Image treatment apparatus
06/12/1991EP0431133A1 Digital image interpolator with multiple interpolation algorithms
06/12/1991EP0431062A1 Teleconference facility with high resolution video display
06/12/1991EP0211070B1 Dynamic gain adjuster for an image scanner
06/11/1991US5023921 Method and a device for processing electric signals coming from the analysis of the line of an image
06/11/1991US5023919 Apparatus and method for treating encoded image data including correction for encoding/decoding deterioration
06/11/1991US5023815 Method and apparatus for registering color film separations
06/11/1991US5023813 Non-volatile memory usage
06/11/1991US5023728 Image forming apparatus
06/11/1991US5023711 Line scanning apparatus using staggered linear segments with adjoining overlap regions
06/11/1991US5023708 Color image forming apparatus for superposing a plurality of images
06/11/1991US5023705 Apparatus for forming a three color image including a first, a second, and a black color from two complimentary colors
06/11/1991US5023635 Dual film and still video studio portrait system using parallel dedicated magnetic tracks on film
06/11/1991US5023632 Electrophotographic image forming method
06/11/1991US5023631 Stopping process control device
06/11/1991US5023448 Beam position sensor for a light beam scanner
06/11/1991US5023442 Apparatus for optically writing information
06/11/1991US5023408 Electronic blackboard and accessories such as writing tools
06/06/1991WO1991008552A1 A parallel processing network that corrects for light scattering in image scanners
06/06/1991DE4021660C1 Roller drive for transporting sheet material - has stepper motor for friction wheel transmission with coaxial driven and output shafts
06/06/1991DE3939551A1 Optisches positionierungssystem fuer mindestens einen bildpunkt An optical positioning system for at least one pixel
06/06/1991DE3939366A1 Detecting information data from film storage - holding film stationary w.r.t. surroundings and guides opto-electronic scanner parallel to its surface
06/06/1991CA2070818A1 Parallel processing network that corrects for light scattering in image scanners
06/05/1991EP0430860A2 Binarization processing method for multivalued image and method to form density pattern for reproducing binary gradations
06/05/1991EP0430758A2 Multi-functional laser printer
06/05/1991EP0430670A2 Image pickup signal processing apparatus
06/05/1991EP0430546A2 Color image recording apparatus
06/05/1991EP0430494A1 Image scanning apparatus
06/05/1991EP0430452A2 Buffering control for accommodating variable data exchange rates
06/05/1991EP0430451A2 Method for enhancing the uniformity and consistency of dot formation produced by colour ink jet printing
06/05/1991EP0430217A2 Facsimile device and automatic receiving method thereof
06/05/1991EP0430165A2 Method of and apparatus for generating conversion curve employable for converting reproduction characteristic of image
06/05/1991EP0430075A2 Image recording apparatus using recording head
06/05/1991EP0429560A1 Method and apparatus for thresholding an image signal.
06/05/1991CN1051984A Apparatus and method for tensing record sheet material
06/04/1991US5022088 Image processing apparatus with provision for memory operation
06/04/1991US5022085 Neighborhood-based merging of image data
06/04/1991US5022072 Communication apparatus
06/04/1991US5022071 Two-way voice & digital data analyzer for telephones
06/04/1991US5021979 Calibration apparatus for a light source used for exposing photographic film with image data
06/04/1991US5021978 Apparatus and method for controlling film density for an apparatus for exposing photographic film with image data
06/04/1991US5021892 Image processing device of multifunctional type
06/04/1991US5021891 Adaptive block size image compression method and system
06/04/1991US5021890 Method of and apparatus for facsimile communications
06/04/1991US5021889 Facsimile apparatus
06/04/1991US5021877 Optical image reading apparatus capable of reading multi-colored original
06/04/1991US5021873 Vertical synchronizing signal
06/04/1991US5021807 Apparatus for electrophotography representing half-tones
06/04/1991US5021641 Hand-held bar code scanner with jointly mounted scanning mirrors
05/1991
05/30/1991WO1991007841A1 Scanning apparatus for halftone image screen writing
05/30/1991WO1991007840A2 Digital compression method and system with improved coding efficiency
05/29/1991EP0429300A2 System of a plurality of terminal apparatuses respondent to a call in a predetermined order
05/29/1991EP0429283A2 Image processing apparatus
05/29/1991EP0429262A2 ISDN terminal equipment operating with circuit switching mode and packet switching mode
05/29/1991EP0429247A1 Electronic image scanners
05/29/1991EP0429201A2 High efficiency image data transfer networks and methods
05/29/1991EP0429072A2 Facsimile store-and-forward switching system
05/29/1991EP0429049A2 Image processing device
05/29/1991EP0429048A2 Facsimile device
05/29/1991EP0428790A1 Image reproducing method
05/29/1991EP0428680A1 A color sequential optical offset image sampling system
05/29/1991EP0428658A1 Reduced banding in bidirectional ink jet printing
05/29/1991DE4037559A1 Transmission and copying device for two way fax machine - use bidirectional rollers to allow multiple scanning of documents
05/29/1991CN1051837A Appangement for connecting telefax device or telephone set to telecommunication line
05/28/1991US5020123 Apparatus and method for image area identification
05/28/1991US5020122 Automatic document image revision
05/28/1991US5020121 Neighborhood block prediction bit compression
05/28/1991US5020119 System for producing serrated, alternating pixel pattern on character boundaries
05/28/1991US5020118 Image reading apparatus
05/28/1991US5020096 Image communication system having improved line control
05/28/1991US5019918 Portable image scanner
05/28/1991US5019917 Coordinate input apparatus
05/28/1991US5019916 Digital copier with a facsimile function
05/28/1991US5019915 Apparatus for printing or clearing a displayed stored video signal
05/28/1991US5019913 Recording apparatus having control data selectively designated in memory which corresponds to one of multiple optical scanning systems
05/28/1991US5019909 Video camera for photographing papers
05/28/1991US5019897 Scanning apparatus for reading a color image
05/28/1991US5019896 Method for forming halftone data
05/28/1991US5019884 Charge transfer device
05/28/1991US5019865 Image processing apparatus wherein vibrations are used to designate a portion of an image to be reproduced
05/28/1991US5019858 Photographic printer
05/28/1991US5019840 Recording apparatus with improved sheet feeding
05/28/1991US5019837 Laser printing system
05/28/1991US5019703 Optical scanner with mirror mounted occluding aperture or filter
05/28/1991US5018813 Multichannel integrated optic modulator for laser printer
05/28/1991US5018808 Method and apparatus for beam displacement in a light beam scanner
05/28/1991US5018806 Image forming apparatus
05/28/1991US5018805 Laser printer
05/28/1991US5018767 Counterfeit protected document
05/25/1991CA2030769A1 Facsimile store-and-forward switching system
05/23/1991DE3938480A1 Vorrichtung zum aufspannen von blattfoermigem aufzeichnungsmaterial Apparatus for recording span of sheet material
05/23/1991DE3938315A1 Power supply method for facsimile machine - providing separate arrangements for stand-by and operating conditions
05/23/1991DE3937696A1 Incoming tele-facsimile communication receiver - has closable container and perforated conveyor belt for air flow passage from fan
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