Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 5471319 | Image processing method and image processing apparatus The invention provides an image processing method and an image processing apparatus suitably applied to an image reading apparatus such as an OCR or a facsimile, by which a drop or a break of a thin line which is caused by a little inclination of an origi... | 11/28/1995 |
| 5455690 | Image reading apparatus An image reading apparatus for photoelectrically reading an image (e.g. as used in facsimile apparatus, digital copying machines, etc.) includes a reference member provided at a reading position within the image reading apparatus; a reading device for rea... | 10/03/1995 |
| 5453848 | Picture processing apparatus An image processing apparatus useful in, for example, FAX machines, for processing a binary or multiple level tone data in an image including a switch for selectively outputting either a binary level or the multiple level tone pattern in accordance with a... | 09/26/1995 |
| 5442464 | Image reading apparatus and method with improved method for correcting output level of photoelectric conversion means A level-controlling-quantity setting apparatus sets a level-controlling-quantity so as to make it correspond to a level of output of a photoelectric conversion device. A level controlling apparatus controls output of the photoelectric conversion device so... | 08/15/1995 |
| 5426582 | Display and gradation correction curve setting method for operation thereof A method of operating a display including providing a display; acquiring an image of a structure by measuring, for each of a plurality of elements, a magnitude representing an element of the structure; providing a plurality of contrast setting control but... | 06/20/1995 |
| 5422740 | Image forming apparatus which effects output gray level correction In an image forming apparatus according to the present invention, characteristics correcting data for correcting input gray level-output gray level characteristics for each of a plurality of steps into which input gray levels are divided are inputted by i... | 06/06/1995 |
| 5422964 | Method and device for spatial filtering of digital images decoded by transformation of block Coding and decoding of digital images by transformation of pixel blocks reduce the data bit rate. Transformation of blocks leads to discontinuities in brightness level for pixels bordering on block boundaries. These discontinuities are detected for each g... | 06/06/1995 |
| 5414535 | Apparatus for reading image from original image on translucent film with automatic adjustment of the quantity of light from a light source An image reading apparatus includes a projector for projecting light through a translucent film so as to produce a projected image from an original image on the film, a correction part for adjusting a quantity of the light, an image sensor for reading out... | 05/09/1995 |
| 5412489 | Shading correction having a line memory read which generates an average reference level from a plurality of lines of a reference plate In an image reading apparatus, the standard data for the normalization of the image read data are obtained with use of a line memory of one line from the standard data of a plurality of lines. The white level data and the black level data are used for the... | 05/02/1995 |
| 5398119 | Photoelectric conversion device's shading correction circuit A shading correction circuit for correcting the shading distortion of a photoelectric conversion device including a plurality of arrayed photocells, has a memory for storing data on the output characteristics of each pixel, represented by image signals ha... | 03/14/1995 |
| 5390030 | Peak holding circuit and video processing unit using the same A peak holding circuit includes a peak holding register for holding a current peak value, and an operation circuit for comparing the current peak value with an input signal and for performing a predetermined operation on the current peak value and the inp... | 02/14/1995 |
| 5388167 | Document image processing system and document image processing method A file document image input can have shading removed to produce a deshaded image that is useful for highly efficient compression encoding, to be thereafter stored and transmitted in such efficient encoded form. When the image is retrieved or received, the... | 02/07/1995 |
| 5371613 | Image reading apparatus An image reader comprises a platen on which an original is to be placed, a read unit for reading an image of the original placed on the platen, a first standard member having even density, a second standard member having even density and provided at a pos... | 12/06/1994 |
| 5359424 | Thermal transfer image forming apparatus using different gamma functions for different density ranges A thermal transfer image forming apparatus comprises: a recording head having a plurality of heating resistor elements arranged in a line; a mechanism for carrying a sheet of recording paper and an ink sheet at a predetermined pitch; a microcomputer inclu... | 10/25/1994 |
| 5359432 | Printer page composition with color and text Page description information received from an interpreter is composed into color plane memories as basic pels for line information and larger, 4 by 2 basic pels for color information, with intensity information for larger color pels also in the color plan... | 10/25/1994 |
| 5347370 | Shading correction method and apparatus Shading correction is effected by partitioning a white standard surface into a plurality of scanning blocks having the same number of scanning lines, scanning the standard surface by block to determine block median values in a first processing stage, dete... | 09/13/1994 |
| 5343282 | Color balance adjusting apparatus for full-color copier A color balance adjusting apparatus is used for a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and t... | 08/30/1994 |
| 5339170 | Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images An image processing system converts screen structured halftone images to continuous tone images. Value data is sequentially generated for successive pixels of a halftone image. An averaging filter is provided for sequentially filtering each pixel in the h... | 08/16/1994 |
| 5337164 | Negative film image reading device In an apparatus for reading a photographed image on a standard size negative film, wherein the photographed image includes a standard size image and a pseudo panoramic image, and wherein the pseudo panoramic image includes an exposed image region and an u... | 08/09/1994 |
| 5333065 | Signal to density mapping with controlled contrast A method of determining a conversion of a digital image representation of a radiologic image into density values wherein the gradation curve of a conventional screen/film system is approximated.... | 07/26/1994 |
| 5331433 | Image reader An image reader that uses a fluorescent lamp as a light source and that corrects colors in accordance with quantities of light reflected from a reference white plate prior to scanning a document. A relationship between a tube wall temperature of the fluor... | 07/19/1994 |
| 5331432 | Image forming apparatus An apparatus for forming an image with modulated image lights which are obtained by modulating an image light in accordance with image signals, including a reference pattern signal generation circuit, a comparator to compare image signals with a reference... | 07/19/1994 |
| 5331428 | Automatic offset and gain control in a document scanner An automatic offset and gain control method for use in an electronic high quality scanning apparatus, operating on the source signal values outputted preferably in digitized form when the scanning apparatus scans a given source document and which represen... | 07/19/1994 |
| 5329378 | Facsimile device with a white level controller A facsimile includes a white level controller having a support and a guide member which is coupled to the support to be movable up and down, the bottom of which is in contact with the glass plate of a reading device by its own weight, and in the lower por... | 07/12/1994 |
| 5327258 | Image processing apparatus An image processing apparatus includes an input unit for inputting multivalue data for each pixel, a resolution conversion unit for generating multivalue data of one pixel corresponding to each block comprising one or a plurality of adjacent pixels of the... | 07/05/1994 |
| 5325210 | Shading data accepting system in image readers Because of using as a light source a halogen lamp which is well stabilized in terms of both the quantity of light and the spectral ratio, it is unnecessary to read shading data whenever the reading of an image is initiated. The shading data can be read wi... | 06/28/1994 |
| 5321524 | Gray level compensator for picture recorder An image recording apparatus is provided for receiving an image signal indicating a density level of a pixel, and for converting the image signal into a modulating signal to modulate a beam light so as to reproduce a corresponding density level on a recor... | 06/14/1994 |
| 5317423 | Image sensing apparatus using calibration sequences stored in extended portions of shift registers In an image sensing apparatus comprising an array of image sensing elements, first and second shift registers are provided, each having stages divided into first and second sections, the stages of the first section of the first and second shift registers ... | 05/31/1994 |
| 5317421 | White reference data generating unit applied to shading correction system A white reference data generating unit which generates white reference data used in a shading correction process includes a line memory for storing white reference data, a determination circuit for determining whether or not the image data supplied from a... | 05/31/1994 |
| 5313310 | Tonal conversion method for pictures Disclosed herein is a tonal conversion method of a picture useful upon producing a reproduced picture such as hard or soft reproduced picture from an original picture recorded or otherwise stored on a recording medium. Tonal conversion is conducted in suc... | 05/17/1994 |
| 5307426 | Image processing apparatus with improved dithering scheme This invention utilizes the fact that a maximum density difference of pixels in a window within a predetermined range including a pixel of interest is large for a character region, and is small for a photograph region. A maximum density difference of an i... | 04/26/1994 |
| 5305057 | Image forming apparatus having correction means for modifying image density signals according to a gradation correction table In an electrophotographic image forming apparatus, a charger sensitizes the photoconductor at a desired initial potential and the photoconductor is exposed to form an electrostatic latent image, which is developed by a developer to form a toner image. A g... | 04/19/1994 |
| 5296942 | Method and apparatus for inspecting lightness on the surface of an object An appratus for inspecting lightness on the surface of an object having at least first and second surface portions different in lightness, wherein an image of the first and second surface portions of the object are taken under appropriate illumination, th... | 03/22/1994 |
| 5289294 | Image processing apparatus An image processing apparatus comprises a first correction part for correcting an error of an input multilevel tone data so that a corrected data having a speficied number of bits is supplied, a multilevel rendition part for generating a multilevel rendit... | 02/22/1994 |
| 5282053 | Scan image processing The method of scanning a document by providing a test patch to be scanned, initially scanning the test patch and storing the signal response of each reading element to the test patch in a pixel threshold table, providing a document to be scanned, scanning... | 01/25/1994 |
| 5282060 | Analog/digital converter having input signal gain control function A gain control signal is produced according to the difference in level between the signal obtained by scanning the white reference plate and the previously stored standard signal. Based on the gain control signal, the amplification level of the signal obt... | 01/25/1994 |
| 5268773 | Document image signal processor having an adaptive threshold A document image signal processor of gray level for use in a facsimile. The document image signal processor establishes a local window and a broad window from document image signals scanned by a CCD image sensor. An average level and a level difference be... | 12/07/1993 |
| 5267053 | Automatic reference control for image scanners A system for calibration and closed loop feedback control of image signals from charge coupled imaging devices. During periodic iterative calibration, sampling the output of dark reference cells on a CCD nets an initial D.C. restoration voltage (black) le... | 11/30/1993 |
| 5260809 | Shading-compensation method and device in image processing In an image processing system in which shading-compensation for eliminating shading-distortion contained inevitably in image light directed to an image sensor via optical systems is carried out, at least two latch unit for temporarily storing comparative ... | 11/09/1993 |
| 5253083 | Image reading apparatus having improved shading correction An image reading apparatus according to the present invention includes: an image reading apparatus including a plurality of image reading elements; a reference image reading apparatus for reading a reference image by using the image reading apparatus; a s... | 10/12/1993 |
