Patents Examined by Randall S. Svihla
  • Patent number: 4908720
    Abstract: A solid-state image pickup apparatus which produces output color image signals having the required number of scanning lines from the respective color signals which are obtained by photographing an image formed by an image pickup tube. In the apparatus, the image pickup section consists of solid-state image sensors which produce one color signal with the required number of scanning lines and other color signals with the number of scanning lines which are more than the required number. A registration adjustment means executes registration adjustment processing on the color signals obtained at the image pickup device by using the other color signals.
    Type: Grant
    Filed: May 4, 1989
    Date of Patent: March 13, 1990
    Inventor: Fumio Nagumo
  • Patent number: 4905097
    Abstract: An image processing system receives image data on a pixel unit basis and converts it into a digital signal and processing it. This system includes: a binary image processor to image process one pixel of image data as a binary digital signal (binary image data); a multivalue image processor to image process one pixel of the image data as a multivalue digital signal (multivalue image data); a binary/multivalue converter to convert the binary image data into the multivalue image data; and a multivalue/binary converter to convert the multivalue image data into the binary image data. The binary image processor and multivalue image processor can transmit and receive data therebetween and can image process any of the binary image data and multivalue image data. The binary digital data is directly transferred to the multivalue image processor. The multivalue digital data is converted into the binary data by the multivalue/binary converter and thereafter, this binary data is transferred to the binary image processor.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: February 27, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhiro Watanabe, Yukari Shibuya
  • Patent number: 4905079
    Abstract: An image processing apparatus separates a color original into a plurality of color signal components and sequentially reads the color signal components so as to sequentially form images corresponding to the color signal components on a photosensitive body. At least two color signal components of a color image to be synthesized with the color original are simultaneously read and are stored in an image memory, and upon image synthesis, the color signal components are read out from the image memory in synchronism with the color signal components.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: February 27, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kimiyoshi Hayashi
  • Patent number: 4903122
    Abstract: A high resolution solid-state color imaging apparatus having two-dimensionally disposed photoelectric sensors are arranged in rows and columns each having a color spectral responsivity characteristic such as by employing color filters. Each of the photoelectric sensors is scanned so as to obtain an intensity signal with respect to each row of each field, and wherein scanning of each field is for the same number of rows as that of each frame. Intensity signals are obtained only by the scanned output of each row. Additional intensity signals equal to half the number of said first mentioned intensity signals are obtained by a 2:1 subsampling of bandwidth-restricted signals by a filter along the vertical temporal frequency, thereby realizing high vertical resolution by the photoelectric image sensors of conventional row numbers and having compatibility with a conventional NTSC system and, furthermore, eliminating aliasing distortion.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: February 20, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Toshifumi Ozaki, Naoki Ozawa, Shinya Ohba, Itaru Mimura
  • Patent number: 4899227
    Abstract: An image processing apparatus capable of detecting (1) the size or position of the original on the table, and/or (2) the size or position of an information portion of the original. The apparatus includes an original supporting table for supporting an original. The original has an information portion and a non-information portion. Reading apparatus is provided for reading an area of the table including the original placed on the table, and for generating image data corresponding to the read area and the read original. First detector circuitry is included for detecting the position or size of the original on the table based on the image data from the reading apparatus. Second detector circuitry is included for detecting the position or the size of the information portion of the original based on the image data from the reading apparatus.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: February 6, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masanori Yamada
  • Patent number: 4899226
    Abstract: An image reading apparatus which has position deviated line sensors. The line sensors are formed by charge coupled devices which are arranged in two staggered rows. The signal from one of the charge coupled devices is delayed for a predetermined period corresponding to the distance between the rows, the speed of scanning and the reading density of the original. An actual timing deviation is calculated to delay one signal relative to the other so that the two signals will be output at the same time.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: February 6, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Tanimoto, Kunihiko Miura, Junichi Koseki
  • Patent number: 4899213
    Abstract: A system is provided for producing image signals of a photographed subject image by a solid state image sensing device and for producing a brightness signal and line sequential color difference signals from the image signal. The subject image is sensed by the image sensing device which has a color filter formed thereon. First and second horizontal scanning lines of picture elements are alternately arranged and the picture elements are opposed to filter elements of the color filter. The first horizontal scanning lines separately transmit at least red light and green light and the second horizontal scanning lines transmit at least blue light and green light, to thereby obtain color image signals. The image signal thus obtained are signal processed to produce the line sequential color difference signals R-Y and B-Y. With this signal processing, the system can produce the image signals including the line sequential color difference signals by a simplified arrangement without impairing the color productivity.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: February 6, 1990
    Inventors: Masahiro Konishi, Masafumi Inuiya, Akira Muramatsu, Masahiro Kato
  • Patent number: 4897736
    Abstract: A color image processing apparatus avoids uneven recording of date used to form the reproduced color image, which using a reduced memory capacity, by suitable deformation of square dot submatrices within a square dot matrix used in halftone dot reproduction, to provide desired screen angles, and by reproducing different density levels with different arrangements of dots within the same dot pattern.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: January 30, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Sugino
  • Patent number: 4896208
    Abstract: An image reading and editing apparatus utilizing: a CCD for reading an image signal concerning light intensity of an image of an original, an attribute memory storing attribute data for defining how the image data is to be processed, said attribute data being set for each small section by which an entire image region of the original is divided, an operation panel for designating an arbitrary small area out of the entire image region and setting attribute data for each of the small sections, an image data processing circuit for outputting the image signal based on the stored attribute data, and an external output apparatus for composing a plurality of images based on the outputted image signal to form a composite image.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: January 23, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Shigeru Moriya, Masamichi Kishi
  • Patent number: 4893178
    Abstract: A simulator for use in an automatic photographic printing apparatus of the type in which a negative image carried by a color negative film is printed on a photographic paper by a light source system which is under an automatic exposure control, the simulator having a CRT for displaying a positive image corresponding to the negative image.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: January 9, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toru Matama, Kenji Suzuki, Koji Takahashi, Tsuneo Suzuki
  • Patent number: 4891690
    Abstract: A color image reading apparatus includes a plurality of linear sensors, each capable of generating plural analog color component signals. The sensors are arranged to read a line of the color image in a divided manner and such that adjacent ones of the linear sensors read mutually different lines of the color image. Also provided is a separator for separating the plural analog color component signals generated by the sensors into analog color component signals of each color, and a converter for converting the analog color component signals of each color into digital color component signals of each color, respectively. The apparatus further includes a device for forming plural continuous digital color component signals representing a line of the color image from the digital color component signals of each color converted by the converter.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: January 2, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shizuo Hasegawa, Nobuo Matsuoka
  • Patent number: 4891691
    Abstract: A color sequential photographic apparatus includes a monochrome display, an optical system, a filter unit, a variable aperture, a display controller, a switching controller, and a photographing controller. The optical system guides a display image on the display toward a color film. The filter unit sequentially selects three primary color filters, and inserts the selected filter in the optical system. The display controller controls the display luminance of the display. The switching controller controls the film exposure time of each image corresponding to three primary colors by sequentially displaying the images on the display during a predetermined interval while simultaneously operating the filter unit. The photographing controller controls at least one of the display controller, the variable aperture, and the switching controller, in accordance with a desired photographing condition.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: January 2, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tatsuro Baba
  • Patent number: 4887151
    Abstract: There is disclosed an apparatus for efficient and faithful encoding of color image data, by dividing color image data into blocks, extracting luminosity information, structure information and color information from each block, and for each block, individually encoding or individually quantizing the color image the structure information and the luminosity information. The signal system may be one employing signals of low mutual correlation, such as an L*a*b* signal system. An orthogonal transformation of the L* components of the color image data for the respective blocks may be performed.
    Type: Grant
    Filed: April 19, 1989
    Date of Patent: December 12, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masafumi Wataya
  • Patent number: 4887252
    Abstract: By using a solid state imaging element which simultaneously read out signals for two neighboring horizontal lines in which modulated chrominance signals differ from each other by 180.degree. of phase using horizontal scanning, the magnitude of the vertical correlation from the simultaneously read out two line signals are detected. Noise normally produced by the vertical correlation error of the luminance signal and chrominance signal are removed. Various embodiments are provided responsive to different problems. An interference signal at 1/3f can be decreased by compensating the horizontal aperture responsive to the vertical correlation of the image. Improvements are described for use when the color difference signals have a poor level difference, or when the vertical correlation of a signal is poor, or in fact does not exist at all. The horizontal correlation of a signal can also be used to reduce noise from various sources.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: December 12, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasumi Miyakawa, Tatsuki Ide
  • Patent number: 4884129
    Abstract: A signal processing apparatus for use with an imaging device having an image signal output circuit inherently generating noise in operation so that noise may be superposed on the image signal. The apparatus comprises a noise suppressor having a sampling and holding circuit for producing noise-suppressed pixel signals carrying different color information to contribute to suppression of noise superposed on the image signal and at the same time to demodulation of chroma signals representative of color components of an image and adders for producing a sum of and a difference between the noise-suppressed pixel signals to thereby produce a luminance signal and chroma signals for an image. The apparatus may further comprise a gain control circuits interposed between the sampling and holding circuit and the difference producing adder so that the amplitudes of the noise-suppressed pixel signals are leveled to improve the color purity of an image reproduced from the image signal.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: November 28, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Ozawa, Toshiyuki Akiyama, Kenji Takahashi, Itaru Mimura, Takahiro Nakano
  • Patent number: 4884148
    Abstract: A circuit for converting a video signal into binary signals comprising a line image sensor for performing photoelectric conversion of an object to be read thereby producing pixel signals. Means are also provided for setting reference levels for respective sections of the line image sensor, the sections being divisions of the entire length of the line image sensor. A comparator compares each pixel signal with the reference level for the section to which the pixel signal in question belongs, to produce a binary signal. An interpolator is further provided for receiving the digital reference level data as is a D/A converter for converting the output of the interpolator to an analog reference level signal and supplying it to the comparator.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: November 28, 1989
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Osamu Ishikawa, Mikihiko Sone, Yoshimi Suzuki
  • Patent number: 4879595
    Abstract: A color image processing technique using optics to separate an original color image into a plurality of colors. These colors are photoelectrically converted to electric signals. Color information signals are then generated from these electric signals. The color information signals are coded by comparing them with a threshold value. An individualized set of such threshold values is provided for each of the plurality of colors. In one embodiment, a luminance signal is provided from the color information signals. The luminance signal is utilized in response to a monochrome code selection signal to enable the original color image to be reproduced as a monochrome image. Color gamut information and color density information of the color gamut can be obtained from the color information signals during a first scan of a document bearing the color image.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: November 7, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hiroshi Niki, Masahiko Matsunawa, Hiroyuki Yamamoto, Yoshinori Abe
  • Patent number: 4879593
    Abstract: After sawtooth wave deflection signals are corrected in a summing circuit for position, magnitude, shape, they are keyed by a blanking circuit, within a blanking interval of the video signal, for briefly inserting a low-voltage reference potential. This is done before the corrected deflection signals are capacitively coupled to high voltage amplifying circuits supplying an electrostatic deflection plate of a camera tube. The high voltage amplifiers are equipped with a clamping circuit timed to clamp the high voltage output to a high voltage reference potential during substantially the same intervals in which the low voltage wave is keyed for insertion of the low voltage reference potential. The vertical deflection signals are keyed at low voltage and clamped at high voltage at the vertical scanning frequency. The horizontal deflection signals may be keyed and clamped either at the horizontal scanning frequency or, for saving of expense and equipment, at the vertical scanning frequency.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: November 7, 1989
    Assignee: Robert Bosch GmbH
    Inventors: Harald Eschelbach, Wolfram Klemmer
  • Patent number: 4878110
    Abstract: In a color image processing apparatus according to the invention, a color image signal being photoelectrically obtained by a image reader is separated into red, blue and black color component signals. A laser scanner writes respective latent images corresponding to the color component signals on a cylindrical photoreceptor. Each of the respective latent images are written during one rotation of the photoreceptor. The initial writing positions of the respective latent images are registered by using a drum index signal generated in synchronization with the rotation of the photoreceptor. An optical output starts outputting an optical signal in response to the index signal or an encoder signal selected according to the copy mode.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: October 31, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hiroyuki Maruyama, Tadao Kishimoto, Toshifumi Isobe, Jun Yokobori
  • Patent number: 4876591
    Abstract: A video signal generating device with which a video signal of high resolution is produced while significantly suppressing the generation of color Moire disturbance. The received optical image is split into two beams and applied to respective color and monochrome image sensors. The optical beam applied to the color sensor is optically filtered to limit it in spatial frequency to a band below that applied to the monochrome sensor. A high frequency luminance signal is produced from an output of the monochrome sensor, a low frequency luminance signal is produced from the output of the color sensor, and a composite luminance signal is formed from the combination of the high and low frequency luminance signals. The overall resolution of the device is determined by the monochrome signals produced by the monochrome sensor.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: October 24, 1989
    Assignee: Fuji Photo Film Co.
    Inventor: Akira Muramatsu