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)
04/1991
04/17/1991CN1012406B Optical receptor
04/17/1991CN1012404B Photoresponsive array
04/17/1991CA2027790A1 Process for providing digital halftone images with random error diffusion
04/16/1991US5008951 Image information encoding/decoding device
04/16/1991US5008950 Image processing method and apparatus for error-dispersion digitization without moire or spurious stripe formation
04/16/1991US5008949 Image processing system
04/16/1991US5008948 System for recognizing handwritten letters
04/16/1991US5008928 Public access facsimile system
04/16/1991US5008926 Message management system
04/16/1991US5008848 Circuit for performing S-transform
04/16/1991US5008837 Gray scale generating circuit for thermal printer
04/16/1991US5008760 Image processing system
04/16/1991US5008752 Digital image interpolator with multiple interpolation algorithms
04/16/1991US5008742 Dot signal conversion method
04/16/1991US5008686 Optical scanning device for scanning a predetermined surface with a plurality of light beams
04/16/1991US5008672 Signal conversion apparatus which reduces quantization errors for telecommunications applications
04/16/1991US5007692 Laser beam scanning system
04/16/1991CA1283203C Image reading apparatus
04/11/1991CA2027080A1 Digital modulation technique
04/10/1991EP0421773A2 Image processing system
04/10/1991EP0421769A2 Electronic still camera
04/10/1991EP0421712A2 Image forming apparatus, and modulating method therein
04/09/1991US5006938 Half-tone image generator using white noise source
04/09/1991US5006937 Imaging data processing apparatus
04/09/1991US5006934 Copying machine capable of storing image data
04/09/1991US5006931 Highly efficient coding apparatus
04/09/1991US5006930 Device for reducing the redundancy in blocks of digital video data in DCT encoding
04/09/1991US5006864 Information read-out and recording apparatus
04/09/1991US5006709 X-ray diagnostics installation
04/09/1991US5006708 Method for generating radiation image signals
04/09/1991US5006705 Light beam scanning apparatus with controller for varying spacing between a plurality of scanning beams
04/09/1991US5006704 Optical scanner and method for generating and detecting a composite dot on a scanning medium
04/09/1991US5006702 Scanning circuit device with sawtooth voltage source
04/09/1991US5006201 Method of making a fiber optic array
04/09/1991CA1282819C Line scanner to reduce banding
04/09/1991CA1282636C Apparatus and method for controlling a thermal printer apparatus
04/04/1991WO1991004631A1 Improved method and apparatus for generating halftone images
04/04/1991WO1991004630A1 System for scanning halftoned images
04/03/1991EP0420644A2 Contact type image sensor
04/03/1991EP0420588A2 Image pickup apparatus
04/03/1991EP0420575A2 Printer apparatus
04/03/1991EP0420573A2 Light quantity control device
04/03/1991EP0420550A2 Image reproducing apparatus
04/03/1991EP0420399A1 Interlace printing process
04/03/1991EP0420259A2 Color image recording method and apparatus
04/03/1991EP0420198A2 Beam scanning apparatus and apparatus for writing image information
04/03/1991EP0420152A2 Method of and apparatus for eliminating false image
04/03/1991EP0420124A2 Optical unit for use in laser beam printer or the like
04/03/1991EP0420089A1 Image reader
04/03/1991EP0419765A1 Color television window expansion and overscan correction for high-resolution raster graphics displays
04/03/1991EP0419624A1 Image sensor
04/03/1991EP0419616A1 Method and apparatus for filtering digital data.
04/03/1991EP0244441B1 Apparatus and method for controlling a thermal printer apparatus
04/03/1991CN1012264B Drive circuit for thermal printer
04/02/1991US5005206 Method of and arrangement for image data compression by means of a neural network
04/02/1991US5005126 System and method for remote presentation of diagnostic image information
04/02/1991US5005076 DCT video signal compression device with intrafield/interfield switching and adjustable high frequency filter
04/02/1991US5005027 Thermal recorder
04/02/1991US5004917 Radiation image information reading apparatus
04/02/1991US5004906 Logarithmic amplifier, and image read-out apparatus using the same
04/02/1991US5004905 Contact type image sensor with a fiber array coated in part with an absorber
03/1991
03/29/1991CA2012481A1 Interlace printing process
03/28/1991DE4029240A1 Electronic still camera with image scanners - has fault correction coders for digital signals transmitted by A=D converters
03/28/1991DE4027248A1 Opto-electronic scanning system for image processing - has image scanned by line of LCD devices coupled to photoconverter
03/28/1991DE3931373A1 Car facsimile appts. with temp. protection - has temp. sensor signals supplied to evaluator and control unit for operational voltage control
03/28/1991DE3931262A1 Light emitting diodes in single row are integrated monolithically - by connecting them in matrix circuit of columns and rows reducing number of connections needed to outside
03/27/1991EP0419363A1 Pulse dialling device for an apparatus connected to a telephone line
03/27/1991EP0418844A2 Color image information processing method
03/27/1991EP0418819A2 Method and apparatus for modulating semiconductor laser or the like, and system using the same
03/27/1991EP0418742A1 Method and device for secure data transmission
03/27/1991EP0418569A2 Image signal reproducing apparatus
03/27/1991EP0418439A1 Image processing system
03/27/1991CN1050206A Oxytitanium phthalocyanine, process for producing same and electrophotosensitive member using same
03/27/1991CN1012252B Optical image scanner
03/27/1991CN1012251B Method and apparatus fur sensing picture
03/26/1991US5003627 Image file system
03/26/1991US5003614 Image processing system
03/26/1991US5003613 Document processing system and method
03/26/1991US5003583 Facsimile printer broadcast exchange (PBX)
03/26/1991US5003581 Telephone line priority sharing device
03/26/1991US5003578 Power-saving device for a cable-information receiving/transmitting apparatus
03/26/1991US5003496 Page memory control in a raster image processor
03/26/1991US5003495 Method and apparatus for scanning, storing and reproducing artwork
03/26/1991US5003494 Data storage system for an electronic color printer
03/26/1991US5003405 Method and apparatus for transmitting verified copy of a document over distances and to substitute for original document
03/26/1991US5003383 Color image copier operable in analog and digital modes
03/26/1991US5003382 Digital color copying machine
03/26/1991US5003381 Method and apparatus for point-by-point reproduction of an original
03/26/1991US5003380 Image reading apparatus having plural line image sensor chips
03/26/1991US5003326 Color image processing method and apparatus
03/26/1991US5003193 Scan control circuit for hand-held type printer
03/26/1991US5003167 Document reader
03/26/1991US5002375 Variable pel density print head for electrophotographic printers
03/26/1991US5002250 Platen for an original
03/26/1991CA1282178C Office automation system with integrated image management
03/26/1991CA1282108C Color image reading and recording apparatus and its image recording method
03/25/1991WO1991004629A1 Image reader
03/25/1991CA2042379A1 Image plate scanner
03/21/1991WO1991003902A1 Improved image compression method and apparatus
03/21/1991WO1991003796A1 A computer based digital image noise reduction method based on overlapping planar approximation
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