Hitachi, Ltd.

Hitachi Koki Co., Ltd.

Hitachi Microsoftware Systems, Inc.

Masaaki Fujinawa

Hiromichi Fujisawa

Hidefumi Masuzaki

Tatsuya Murakami

Yasuo Kurosu

Atsushi Hatakeyama

Eiichi Hadano

Kanji Kato

Hisamitsu Kawaguchi

Yoshihiro Yokoyama

Masaharu Murakami

Kazunori Kinoshita

Noriyuki Kaneoka

Satoshi Ito

Mitsuru Akizawa

Mitsuo Ooyama

Kazuyuki Kodama

Seiichi Kanema

Masahiro Okumura

Naoaki Kubushiro

Hirowo Shimizu

Hajime Uchiyama

Tsugio Takahashi

Kenichi Nishikawa

Hiroaki Iguchi

Susumu Saito

Nobuyuki Minowa

Yoshihiro Shima

Masashi Koga

Hiroshi Abei

Hideo Uzuhashi

Mineo Harada

Toshihiro Hananoi

Akihisa Hirasawa

Hiroshi Sakou

Kenichi Iizuka

Yasuaki Nakano

Tatsuo Goto

Motokazu Uchida

Fumio Wakamori

Kiyoo Takeyasu

Narihiro Munemasa

Kiyomichi Kurino

Yasuo Kuroshu

Sunao Iwaki

Hitoshi Tachi

A method for making document information searches. In performing a document search with respect to the desired key word, two stages of presearch are carried out. In a first stage of presearch, a character component table in which an existence of character codes for every document is stated with respect to all the character codes contained in the group of document text data of stored documents is generated, and the character component table is searched for all the character strings constituting a desiredly designated search subject key word to thereby extract all the documents each containing all the character codes constituting the search subject key word. In a second stage of presearch, contracted text data for every document in which adjuncts and duplication of repeatedly stated words contained in advance in the text data are eliminated is generated, and the documents each containing the search subject key words by word are extracted from the documents extracted by the first presearch. After the second stage of presearch, text search is performed in accordance with a neighbor condition, a contextual condition, or the like.

Presearch type document search method and apparatus

The present invention provides an image reducing system and method capable of retaining fine lines in a reduced image by reducing an original image and by quickly forming the reduced image with high quality. The method includes specifying positions of pixels of a reduced image in the original image according to reduction ratios, extracting a run of pieces of the same color information about the color of the pixels of the original image as a line, determining the line width of the extracted line and determining the line width after reduction in the reduction ratios based on the line width of the extracted line and calculating the centroid of the extracted line, and retaining the color information about the extracted line at a reduced pixel near the centroid on the basis of the centroid of the extracted line and the line width after reduction. The method further performs the step of determining the color information about each reduced pixel based on the retained color information.

Apparatus and method for image reduction

Disclosed herein is a system integrally comprising a CAD system and an electronic filing system. When vector data such as figures and their names are converted to image (raster) data for storage, the system automatically extracts, from the vector data coming from the CAD system, those data that correspond to predetermined character attributes, maximum numeric attributes, primitives of each figure and the topology thereof. The data are set as key-words and are made to correspond to the image data for registration and storage into the electronic filing system. In searching for desired image data, the corresponding key-words are input for data retrieval and output.

Method and system for registering and filing image data

A document information compression and retrieval system which reduces the document data amount and shortens the retrieval time when mass document information is registered and retrieved. A method of registering document information in a document information retrieval system which stores document information consisting of a large number of characters for retrieval of the stored document information. Entered document information is separated into words. Whether or not each of the words is a word to which a compressed code is assigned is determined. If not already assigned, a compressed code is assigned to the word. The words are converted into the assigned compressed codes for storing a compressed text. At output, retrieval information is accepted and converted into compressed code and stored compressed texts are searched for the compressed text matching the compressed code of the retrieval information, then the words corresponding to the compressed codes are used to expand the compressed text into original document information.

Document information compression and retrieval system and document

Monochrome multi-color, and full-color documents are automatically discriminated from each other, and character and photograph regions are also determined in an automatic manner, thereby producing appropriate binary image data according to the operation results. An image data transformation apparatus includes a binarizing section for converting image data inputted thereto into binary image data associated with a plurality of different colors, binary image data buffers for temporarily storing therein the binary image data, a decision section for deciding based on the input image data whether the monochrome, color, or multi-color output is to be produced and whether an intermediate-tone or particular color pixel is to be processed, and a binary image data selection/output section for selecting as output therefrom binary image data according to the decision results.

Image data transformation apparatus and image entry apparatus

An image processing system wherein for an inputted composite image composed of a line image and a dither image, both a line image processing and a dither image processing are carried out in parallel, and one of the processed results as selected in accordance with the image region discrimination result. The dither image processing is carried out through data conversion for calculating multivalued gray scale image from the inputted image data, gray scale data conversion for adjusting the gray scale image data so as to match an output device and obtaining such adjusted gray scale image data, and re-binarization for re-binarizing the gray scale image data after subjected to the gray scale conversion. The image region discrimination for discriminating if an image region is of a line image of a dither image is carried out based on a ratio of the number of black or white pixels within the region to the contour line length within the range. In ordered dither image through a screened type dither matrix is discriminated in accordance with a correlation between adjacent pixel trains each having a predetermined number of pixels.

Image processing system

A data processor and a data transfer method for efficiently transferring data between a plurality of information processing devices as in a client server system. In case non-coded data such as image data are transmitted, it is necessary to make the transmission management requirements such as protocol, data structure, coding scheme, and coding default condition coincide between the transmitting side and the receiving side. In order to satisfy this requirement, a data processor lying between a plurality of information processing devices and having a data transfer intermediary function records beforehand transmission management information including identification information concerning a plurality of clients, discriminates a client by using the identification information, and recognizes transmission management information concerning the discriminated client. In addition, the data processor analyzes transmission data supplied from the server, on the basis of the transmission management information, and converts it to transmission data conformed to the client.

Data processor and data transfer method

A method and apparatus for performing a document information search to uncover specified text data containing a given search subject key word from a group of document text data stored in a memory. In the document information search method, two stages of presearch are carried out to perform the document search with respect to a desired subject key word. In a first stage of presearch, a character component table is generated in which the existence of character codes for every document is set forth with respect to all the character codes contained in the group of document text data of stored documents. The character component table is searched for all the character codes comprising a designated search subject key word to thereby extract all documents containing all the character codes comprising the search subject key word. Further, in the presearch step, all texts without the possibility of containing the search subject key word are eliminated. A comprehensive, narrowed text search is thereby performed in accordance with the search subject key word.

Hierarchical presearch type text search method and apparatus and

An image processing unit relating to a unit for compressing image data, which, in particular, executes an MMR compression scheme which is a standard of facsimile, and improves a data compression ratio while maintaining data exchangeability. The image processing unit includes an image input unit having a function of inputting given image data, an image pattern detector for detecting a predetermined specific image pattern from image data inputted through the image input unit, an image transformation unit for transforming the detected specific image pattern into specific image data in accordance with a predetermined rule, an image compression unit having a function of compressing image data applied with transformation processing in accordance with predetermined steps of procedure, an image decompression unit for decompressing the compressed image data in accordance with predetermined steps of procedure, and a storage unit for storing image data given from the image compression unit or the image decompression unit.

Image processing unit

Color image processing method and apparatus for suppressing side effects of a chrominance emphasizing process are provided. A chrominance C of an original color image is detected by a chrominance detector. A luminousness V of the original color image is detected by a luminousness detector. A parameter selector selects chrominance conversion parameters on the basis of the chrominance C and luminousness V to generate a selected parameter. A chrominance converter executes the chrominance conversion by chrominance conversion parameters a to i. It is possible to suppress a side effect such that the color deviation becomes conspicuous in a portion of small chrominance and luminousness due to the execution of the chrominance emphasizing process. Thus, image data of a high quality can be obtained.

Color image processing method and apparatus with chrominance emphasizing

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 decoded and deshaded image may have shading returned to it by combining with a shaded template image stored in the template image memory or by synthesizing shading in specified regions. By removing shading from regions, optical character recognition, shading identification or other processing such as smear prevention can be enhanced.

Document image processing system and document image processing method

A drawing data obtained by a CAD device is extended once to an image data on a plane and the extended image data is coded and stored in an electronic file device so that every display can be done by merely reading data stored in the electronic file device, decoding and displaying it. The image data having a plurality of attributes is stored attribute by attribute so that the electronic file device can display only image having attribute or attributes instructed and it is possible to obtain only required image information among various informations contained in a complicated image and thus searching is facilitated.

Registration/search system for registering and searching image data

In an image filing system including an image scanner having at least a color mode and a monochrome mode as image input mode, for inputting document images; a key device for designating the image input mode of the image scanner, an image file for storing document image data inputted from the image scanner and a display screen on which the document images are displayed, a background corresponding to the image input mode is outputted when the document image inputted for the image scanner is displayed on the display screen. If a monochrome document is inputted for processing in a full color or multicolor mode, a monochrome input image and the background which is specific to the full color or the multicolor mode are outputted. Accordingly, a user which looks at the display notices that he or she should change the input mode and inputs the document image again prior to registration of the inputted image in a file.

Document image filing system having input color mode selecting capability

A character stream search system using an FSA for determining at a time whether or not a plurality of character streams as search objects exist in a search character stream which undergoes a search operation and which comprises a plurality of characters expressed with codes. In the system, a collation is conducted between the search character stream and a search object character. In a case where there exists a matched search object character as a result of the collation, a state transition is carried out to a predetermined state indicated by the FSA. In a case where there does not exist a matched search object character, a failure processing to effect a state transition to a transition destination which is determined in association with the configuration of the FSA. The failure processing is completed at a count which is a predetermined upper-limit value for each character undergone the search operation.

Character stream search apparatus using a finite state automation

An image processing system which has functions for inputting, storing or receiving, as a binary image data, an image as a document including a photograph having a varying brightness density and of outputting a multi-valued, half-tone image data to a display, a printer or the like, and an image processing method. The system includes a restoration processor. The restoration processor includes a storage for storing therein the binary image data scanningly inputted with use of a window of a predetermined size of m.times.n pixels, a white pixel number detector for detecting the number of white pixels in the binary image data within the window, a plurality of calculators for performing multiplication/accumulations operation over the binary image data within the window and a predetermined coefficient matrix to provide a plurality of multi-valued image data, and a selector for selecting one of the plurality of multi-valued image data found by the plurality of calculators.

Image restoration processing system and method

Growing community of inventors

Tokyo, Japan

Masaaki Fujinawa