公开(公告)号：DE60041473D1

公开(公告)日：2009-03-19

申请号：DE60041473

申请日：2000-05-30

Applicant: SHARP KK

Inventor： TOKUYAMA MITSURU ,  NAKAMURA MASATSUGU ,  TANIMURA MIHOKO ,  YASUOKA NORIHIDE ,  OHTSUKI MASAAKI ,  SAKITA HIROHUMI

IPC: H04N1/17 ,  H04N1/40 ,  G06T3/40 ,  H04N1/387 ,  H04N1/409

Abstract: An image processing device of the present invention includes a region separating section and a filter processing section. With respect to a picture signal which is read out after resolution thereof in a sub scanning direction has been converted, the region separating section computes maximum density difference and complexity as feature parameters indicative of a characteristic of each pixel in the picture signal. Additionally, with respect to the complexity which is dependent on a size of the resolution in the sub scanning direction, the region separating section carries out a correction in accordance with the size of the resolution in the sub scanning direction, and separates the picture signal into each region by using the maximum density difference and the corrected complexity. In accordance with the size of the resolution in the sub scanning direction and each region separated by the region separating section, the filter processing section performs suitable image processing of the picture signal.

公开(公告)号：DE69333444T2

公开(公告)日：2005-02-24

申请号：DE69333444

申请日：1993-11-22

Applicant: SHARP KK

Inventor： MAEDA HIROSHI ,  YAMAGISHI TOSHIO ,  KUNIKAWA NORIHIDE ,  OKAHASHI TOSHIHIRO ,  ITOH TATSUYA ,  NAKAMURA MASATSUGU

IPC: H04N1/40 ,  H04N1/409

Abstract: The present invention is made to reduce the effect of variation of pulses for driving a printer when recording image data and to improve the gray level representation of picture images to be printed. Data incoming through an image reading device are quantized and processed by two pixels by a gray level image processing circuit. The two-pixels' data are first discriminated by an edge discriminator (1) whether they represent an edge portion within the image or not. An object image, on which an operation for inter-pixel spacing shall be conducted, is selected according to the discrimination result. The arithmetic and logic portion (2) performs the above-mentioned operation by two pixels if the data are non-edge portion, while it performs correction for enhance if the data are an edge. This may eliminate effect of dots' displacement due to variation of drive in a printer and improve the quality, in particular, of a gray level image portion.

公开(公告)号：DE69818593D1

公开(公告)日：2003-11-06

申请号：DE69818593

申请日：1998-07-20

Applicant: SHARP KK

Inventor： TANIMURA MIHOKO ,  TOKUYAMA MITSURU ,  NAKAMURA MASATSUGU ,  OHTSUKI MASAAKI

IPC: G06T7/00 ,  G06T7/40 ,  H04N1/40 ,  H04N1/403

Abstract: The read out image data is stored in the mask memory in a predetermined mask unit, and binarized into binary value with a predetermined threshold in the binarizing circuit. The binarized image data is output to the main scanning direction-black pixel counting circuit and the sub scanning direction-black pixel counting circuit, respectively, to count black pixels in the main scanning direction and in the sub scanning direction, respectively. The largest value is determined by the comparator, and designated as the linkage degree. With the judging circuit, the area judgement of the character area, the photograph area and the dot area is performed based on the linkage degree.

公开(公告)号：DE3601549A1

公开(公告)日：1986-07-24

申请号：DE3601549

申请日：1986-01-21

Applicant: SHARP KK

Inventor： OHASHI KUNIO ,  WAKITA KAZUKI ,  TONEGAWA TADASHI ,  NAGATA SYOICHI ,  NAKAMURA MASATSUGU ,  MAEYAMA KAZUO

IPC: G03G21/08 ,  G03G13/22 ,  G03G21/00 ,  G03G13/00 ,  G03G15/00

Abstract: An electrophotographic method comprises a step of precharging up to the introductory recharging of a recording medium with a polarity which is opposite to the previously established polarity of a charge applied to the recording medium for the purpose of generating an electrostatic latent image for copying, and a discharging step for discharging the recording medium before the recharging step, in order to prevent a drop in the potential of the surface charge on the recording medium.

公开(公告)号：DE69517781T2

公开(公告)日：2001-02-15

申请号：DE69517781

申请日：1995-11-17

Applicant: SHARP KK

Inventor： SHINKAWA KOUJI ,  OHTSUKI MASAAKI ,  OKADA MIHOKO ,  TOKUYAMA MITSURU ,  SAKITA HIROFUMI ,  NAKAMURA MASATSUGU

IPC: G03G21/00 ,  G03G21/08

公开(公告)号：DE69328660T2

公开(公告)日：2001-01-11

申请号：DE69328660

申请日：1993-11-22

Applicant: SHARP KK

Inventor： MAEDA HIROSHI ,  YAMAGISHI TOSHIO ,  KUNIKAWA NORIHIDE ,  OKAHASHI TOSHIHIRO ,  ITOH TATSUYA ,  NAKAMURA MASATSUGU

IPC: H04N1/40 ,  H04N1/409

Abstract: The present invention is made to reduce the effect of variation of pulses for driving a printer when recording image data and to improve the gray level representation of picture images to be printed. Data incoming through an image reading device are quantized and processed by two pixels by a gray level image processing circuit. The two-pixels' data are first discriminated by an edge discriminator (1) whether they represent an edge portion within the image or not. An object image, on which an operation for inter-pixel spacing shall be conducted, is selected according to the discrimination result. The arithmetic and logic portion (2) performs the above-mentioned operation by two pixels if the data are non-edge portion, while it performs correction for enhance if the data are an edge. This may eliminate effect of dots' displacement due to variation of drive in a printer and improve the quality, in particular, of a gray level image portion.

公开(公告)号：DE69333444D1

公开(公告)日：2004-04-08

申请号：DE69333444

申请日：1993-11-22

Applicant: SHARP KK

Inventor： MAEDA HIROSHI ,  YAMAGISHI TOSHIO ,  KUNIKAWA NORIHIDE ,  OKAHASHI TOSHIHIRO ,  ITOH TATSUYA ,  NAKAMURA MASATSUGU

IPC: H04N1/40 ,  H04N1/409

Abstract: The present invention is made to reduce the effect of variation of pulses for driving a printer when recording image data and to improve the gray level representation of picture images to be printed. Data incoming through an image reading device are quantized and processed by two pixels by a gray level image processing circuit. The two-pixels' data are first discriminated by an edge discriminator (1) whether they represent an edge portion within the image or not. An object image, on which an operation for inter-pixel spacing shall be conducted, is selected according to the discrimination result. The arithmetic and logic portion (2) performs the above-mentioned operation by two pixels if the data are non-edge portion, while it performs correction for enhance if the data are an edge. This may eliminate effect of dots' displacement due to variation of drive in a printer and improve the quality, in particular, of a gray level image portion.

公开(公告)号：FR2590077A1

公开(公告)日：1987-05-15

申请号：FR8615607

申请日：1986-11-07

Applicant: SHARP KK

Inventor： WAKITA KAZUKI ,  NAGATA SYOICHI ,  NAKAMURA MASATSUGU ,  OHASHI KUNIO ,  TONEGAWA TADASHI ,  NAGAYAMA KATSUHIRO ,  MURASATO YOSHIKO

IPC: H01L21/205 ,  H01L31/09 ,  H01L31/20 ,  H01L31/18

Abstract: The invention relates to the manufacture of a photoconductor element. According to the invention, the ratio of the B2H6/SiH4 flow rates is adjusted in a reaction chamber 2 where there is a luminescent discharge between electrodes 9, 9' with a value sufficient for the product mu tau of the mobility mu of the electrons in the resulting photoconductor element times their lifetime tau to be equal to or less than 10 cm /V; and an amorphous silicon layer is formed on a substrate such as a drum 1.

公开(公告)号：DE3638200A1

公开(公告)日：1987-05-14

申请号：DE3638200

申请日：1986-11-08

Applicant: SHARP KK

Inventor： WAKITA KAZUKI ,  NAGATA SYOICHI ,  NAKAMURA MASATSUGU ,  OHASHI KUNIO ,  TONEGAWA TADASHI ,  NAGAYAMA KATSUHIRO ,  MURASATO YOSHIKO

IPC: H01L21/205 ,  H01L31/09 ,  H01L31/20 ,  G03G5/082 ,  C23C16/24

公开(公告)号：DE3601198A1

公开(公告)日：1986-07-17

申请号：DE3601198

申请日：1986-01-17

Applicant: SHARP KK

Inventor： NAKAMURA MASATSUGU ,  NAGATA SYOICHI ,  MAEYAMA KAZUO ,  OHASHI KUNIO ,  TONEGAWA TADASHI ,  WAKITA KAZUKI

IPC: G03G15/02 ,  G03G5/08 ,  G03G13/02 ,  G03G13/26 ,  G03G21/00 ,  G03G21/08 ,  G03G5/082

Abstract: An electric photographical copying system which provides a main charger for charging the photo-conductive layer of the recording medium, an optical exposure means for projecting an image of an original onto the photo-conductive layer to make an electrostatic latent image thereon, a developing device for developing the latent image with developer, a transfer device for transferring the image developed onto a copy sheet, a cleaning device for cleaning residual developer on the photo-conductive layer and an erasing device for erasing the surface potential of the photo-conductive layer. The devices are successively activated in an order to use the recording medium repeatedly.