Patents by Inventor Satoshi Naoi

Satoshi Naoi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9292931
    Abstract: The invention provides an apparatus and method for extracting a boundary of an object in an image and an electronic device. The apparatus includes: a position determining unit, configured to determine a start point and an end point of a boundary of an object in an image and to determine a position of a reference point relevant to the start point and the end point; a first direction determining unit, configured to determine a first direction of the boundary; a gradient map obtaining unit, configured to obtain a gradient map of a first region; a gradient attenuating unit, configured to attenuate in the gradient map the gradients of a second region; and an extracting unit, configured to extract a boundary of an object. The technology of the invention can improve the accuracy of boundary extracting, and can be applied in the field of image processing.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: March 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Pan Pan, Yuan He, Jun Sun, Satoshi Naoi
  • Patent number: 9239954
    Abstract: The disclosure provides an image processing device, image processing method, scanner and storage medium. The image processing device is used for tracing a boundary of an object image in an image, the boundary being continuous and the rate of change in slope between adjacent points on the boundary being slow. The image processing device includes: a boundary estimation unit, adapted to estimate the location of the boundary of the object image; an interfering gradient processing unit, adapted to process an interfering gradient near the estimated boundary, so as to reduce the interfering gradient or remove the interfering gradient from the image; and a boundary tracing unit, adapted to trace the boundary in the image having the interfering gradient processed. By using the technique of the disclosure, the accuracy of tracing a boundary of an image is improved significantly.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: January 19, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Pan Pan, Yuan He, Jun Sun, Satoshi Naoi
  • Patent number: 9202282
    Abstract: The present invention discloses a boundary extraction method and apparatus, the method including: a gradient estimation step of estimating a gradient of each pixel in a captured image; a gradient adjustment step of adjusting, by enhancing a gradient of a target boundary of an object contained in the captured image and weakening a gradient of a noise boundary, the estimated gradient, so that the adjusted gradient is considered as a current gradient; and a boundary extraction step of extracting a boundary of the object based on the current gradient. According to the embodiments of the invention, in a case of using a non-contact imaging device to capture an image, it is possible to more accurately extract a boundary of an object contained in the captured image.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: December 1, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yuan He, Jun Sun, Satoshi Naoi
  • Patent number: 9202260
    Abstract: The present invention relates to a method and apparatus for processing a scanned image. The method for processing a scanned image comprises: a shaded region extracting step of extracting a region, which is shaded by a shading object and lies in a margin in the vicinity of an edge of the scanned image, as a shaded region and a pixel value repairing step of repairing values of pixels, which lie both in a line segment and the shaded region, by using a linear model according to known values of pixels, which lie both in the line segment and the margin, the line segment passing through the shaded region and being parallel to the edge.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: December 1, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yuan He, Jun Sun, Satoshi Naoi
  • Patent number: 9129385
    Abstract: The present invention provides an image processing device, an image processing method and an apparatus so as to improve at least the precision of extracting document corners in image processing performed on an image captured for a document. The image processing device includes: an extracting unit for extracting boundaries of a document in a first direction and roughly-detected document corners, where the first direction is a horizontal direction or a vertical direction of the document image; a determining unit for determining candidate page corners on the boundaries in the first direction around the roughly-detected document corners; and a selecting unit for determining document corners of the document among the candidate page corners. With the foregoing technology of the invention, more precise document corners can be extracted, a better effect of image processing can be obtained, and applications in the field of image processing are possible.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: September 8, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Shufu Xie, Yuan He, Jun Sun, Hao Yu, Satoshi Naoi
  • Patent number: 9092844
    Abstract: The present invention discloses a method and apparatus for correcting a corner point of an image and an image processing device. The method includes: determining first candidate corner points of an initial corner point in a first local region; obtaining information related to the image in a second local region; selecting, among the first candidate corner points of the initial corner point, the first candidate corner points meeting a predetermined condition, as second candidate corner points of the initial corner point according to the information; and correcting the initial corner point using the second candidate corner points of the initial corner point. The apparatus is configured to perform the processes of the method. The image processing device includes the apparatus for correcting a corner point of an image. With the technology, a roughly detected corner point can be corrected.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 28, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Pan Pan, Yuan He, Jun Sun, Satoshi Naoi
  • Patent number: 9082181
    Abstract: An image processing method and apparatus is provided. The image processing method includes steps of: generating a first scale binary image from an image, wherein the first scale is smaller than the original scale of the image; detecting at least one text line in the image based on the first scale binary image; generating a second scale binary image from the image, wherein the second scale is larger than the first scale; for each text line, calculating a similarity between corresponding sections in the first scale binary image and the second scale binary image, and removing the text line for which the similarity is lower than a predetermined level; for one or more of the remaining text line(s), performing OCR on corresponding section(s) in the second scale binary image to determine character orientation(s) of corresponding text line(s); and determining the orientation of the image according to the determined character orientation(s).
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: July 14, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Jun Sun, Yifeng Pan, Satoshi Naoi
  • Patent number: 9077926
    Abstract: An image processing method includes estimating corners of a contour of an object area in an obtained image, searching for contour lines of the object area between every two points which are offset from the estimated corners within a predetermined degree or distance along a direction away from the object area respectively, and determining intersection points of the contour lines as final corners of the contour of the object area, and determining contour lines between the final corners as a final contour of the object area.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: July 7, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yuan He, Jun Sun, Hao Yu, Satoshi Naoi
  • Patent number: 9070035
    Abstract: The disclosure provides a document processing apparatus, method and a scanner. The document processing apparatus includes: a text line extraction unit extracting a text line from an input document; a language classification unit determining whether an OCR process is necessary for a language of the input document; an OCR unit determining, by performing the OCR process, an OCR confidence in the case that it is determined that the OCR process is necessary; an graphic feature recognition unit determining an graphic feature recognition confidence; and a determination unit determining a combination confidence based on at least one of the determined graphic feature recognition confidences and the determined OCR confidences, and determining an orientation of the input document based on the combination confidences. This technical solution can determine better an orientation of the document, and is especially applicable when the quality of the image of the document is deteriorated.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: June 30, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yifeng Pan, Jun Sun, Yuan He, Satoshi Naoi
  • Patent number: 8907972
    Abstract: An image processing device including: a local mean image generating section; a binarization image generating section configured to generate a binarization image, wherein pixels corresponding to high frequency regions and low frequency regions have a first and second grey scales, respectively; a ternarization image generating section configured to divide, based on comparison between the image and the local mean image, first grey scale regions in the binarization image into regions having the first grey scale and regions having a third grey scale; a filling section configured to recognize connected regions having the second grey scale in the ternarization image, to fill the connected regions with the first grey scale or with the third grey scale according to grey scale of pixels at boundaries of the connected regions; and a recognizing section configured to recognize strokes according to consistency of grey scale at object boundaries in the filled ternarization image.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: December 9, 2014
    Assignee: Fujitsu Limited
    Inventors: Danian Zheng, Jun Sun, Satoshi Naoi
  • Patent number: 8805080
    Abstract: The present embodiments disclose a method of and device for identifying the direction of characters in an image block. The method includes: performing optical character recognition processing on the image block by assuming various directions as assumed character directions to obtain sub image blocks, recognized characters corresponding to the sub image blocks and correctness measures thereof in each assumed character directions; in sub image blocks in the assumed character directions with 180° mutual relation, searching for a minimum matching pair of the sub image blocks; adjusting the sub image blocks in the searched minimum matching pair to eliminate the effect, on an identification result, of different numbers of sub image blocks in various assumed character directions; calculating an accumulative correctness measure in each assumed character directions based on the adjusted sub image blocks; and identifying the direction of characters in the image block according to the accumulative correctness measures.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: August 12, 2014
    Assignee: Fujitsu Limited
    Inventors: Jun Sun, Satoshi Naoi
  • Patent number: 8787674
    Abstract: The embodiments disclose a method of and a device for identifying direction of characters in image block. The method includes: performing optical character recognition processing on the image block by assuming various directions as assumed character directions to obtain sub image blocks, recognized characters and correctness measures in each assumed direction; in sub image blocks in the assumed directions with a 180° mutual relation, searching for a minimum matching pair; when there is one sub image block in each assumed direction in a minimum matching pair and recognized characters belonging to the minimum matching pair are the same rotation invariant character or belong to the same rotation invariant character pair, adjusting their correctness measures to the same; calculating an accumulative correctness measure in each assumed direction based on the adjusted results; and identifying the direction of the characters in the image block according to the accumulative correctness measures.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: July 22, 2014
    Assignee: Fujitsu Limited
    Inventors: Jun Sun, Satoshi Naoi
  • Patent number: 8737743
    Abstract: The present embodiments disclose a method of and a device for identifying the direction of characters in an image block. The method includes: performing optical character recognition processing on the image block by assuming various directions as assumed character directions, respectively, to obtain sub image blocks, recognized characters corresponding to the sub image blocks and correctness measures thereof in each of the assumed character directions; determining a language group to which the characters in the image block belong; adjusting a correctness measure corresponding to a sub image block which corresponds to a recognized character not belonging to the determined language group in each of the assumed character directions; calculating an accumulative correctness measure in each of the assumed character directions based on the adjusted correctness measure; and identifying the direction of the characters in the image block according to the accumulative correctness measures.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: May 27, 2014
    Assignee: Fujitsu Limited
    Inventors: Jun Sun, Satoshi Naoi
  • Patent number: 8717632
    Abstract: An image processing method generally includes: obtaining a vanishing point on a curved surface in a two-dimension image; extracting all the straight line segments between a top contour line and a bottom contour line of the curved surface by the vanishing point; removing a perspective distortion to get parallel straight line segments; obtaining the lengths of the straight line segments, obtaining the true width of each of the straight line segments in a three-dimension space and the depth increment of the straight line segments according to the lengths; obtaining the expanded width of each straight line segment according to the true width and the depth increment; obtaining the total expanded width of the curved surface to transform it into a flat surface; transforming image contents on the curved surface onto the flat surface.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: May 6, 2014
    Assignee: Fujitsu Limited
    Inventors: Danian Zheng, Jun Sun, Satoshi Naoi
  • Publication number: 20130330009
    Abstract: The invention provides an apparatus and method for extracting a boundary of an object in an image and an electronic device. The apparatus includes: a position determining unit, configured to determine a start point and an end point of a boundary of an object in an image and to determine a position of a reference point relevant to the start point and the end point; a first direction determining unit, configured to determine a first direction of the boundary; a gradient map obtaining unit, configured to obtain a gradient map of a first region; a gradient attenuating unit, configured to attenuate in the gradient map the gradients of a second region; and an extracting unit, configured to extract a boundary of an object. The technology of the invention can improve the accuracy of boundary extracting, and can be applied in the field of image processing.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 12, 2013
    Inventors: Pan PAN, Yuan He, Jun Sun, Satoshi Naoi
  • Publication number: 20130322769
    Abstract: The disclosure provides an image processing device, image processing method, scanner and storage medium. The image processing device is used for tracing a boundary of an object image in an image, the boundary being continuous and the rate of change in slope between adjacent points on the boundary being slow. The image processing device includes: a boundary estimation unit, adapted to estimate the location of the boundary of the object image; an interfering gradient processing unit, adapted to process an interfering gradient near the estimated boundary, so as to reduce the interfering gradient or remove the interfering gradient from the image; and a boundary tracing unit, adapted to trace the boundary in the image having the interfering gradient processed. By using the technique of the disclosure, the accuracy of tracing a boundary of an image is improved significantly.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 5, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Pan PAN, Yuan He, Jun Sun, Satoshi Naoi
  • Publication number: 20130322757
    Abstract: The disclosure provides a document processing apparatus, method and a scanner. The document processing apparatus includes: a text line extraction unit extracting a text line from an input document; a language classification unit determining whether an OCR process is necessary for a language of the input document; an OCR unit determining, by performing the OCR process, an OCR confidence in the case that it is determined that the OCR process is necessary; an graphic feature recognition unit determining an graphic feature recognition confidence; and a determination unit determining a combination confidence based on at least one of the determined graphic feature recognition confidences and the determined OCR confidences, and determining an orientation of the input document based on the combination confidences. This technical solution can determine better an orientation of the document, and is especially applicable when the quality of the image of the document is deteriorated.
    Type: Application
    Filed: May 29, 2013
    Publication date: December 5, 2013
    Inventors: Yifeng PAN, Jun SUN, Yuan HE, Satoshi NAOI
  • Publication number: 20130322768
    Abstract: The present invention discloses a boundary extraction method and apparatus, the method including: a gradient estimation step of estimating a gradient of each pixel in a captured image; a gradient adjustment step of adjusting, by enhancing a gradient of a target boundary of an object contained in the captured image and weakening a gradient of a noise boundary, the estimated gradient, so that the adjusted gradient is considered as a current gradient; and a boundary extraction step of extracting a boundary of the object based on the current gradient. According to the embodiments of the invention, in a case of using a non-contact imaging device to capture an image, it is possible to more accurately extract a boundary of an object contained in the captured image.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 5, 2013
    Inventors: Yuan HE, Jun SUN, Satoshi NAOI
  • Publication number: 20130294696
    Abstract: An image processing method and apparatus is provided. The image processing method includes steps of: generating a first scale binary image from an image, wherein the first scale is smaller than the original scale of the image; detecting at least one text line in the image based on the first scale binary image; generating a second scale binary image from the image, wherein the second scale is larger than the first scale; for each text line, calculating a similarity between corresponding sections in the first scale binary image and the second scale binary image, and removing the text line for which the similarity is lower than a predetermined level; for one or more of the remaining text line(s), performing OCR on corresponding section(s) in the second scale binary image to determine character orientation(s) of corresponding text line(s); and determining the orientation of the image according to the determined character orientation(s).
    Type: Application
    Filed: May 2, 2013
    Publication date: November 7, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Jun SUN, Yifeng PAN, Satoshi NAOI
  • Publication number: 20130272602
    Abstract: The present invention relates to a method and apparatus for processing a scanned image. The method for processing a scanned image comprises: a shaded region extracting step of extracting a region, which is shaded by a shading object and lies in a margin in the vicinity of an edge of the scanned image, as a shaded region; and a pixel value repairing step of repairing values of pixels, which lie both in a line segment and the shaded region, by using a linear model according to known values of pixels, which lie both in the line segment and the margin, the line segment passing through the shaded region and being parallel to the edge.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 17, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Yuan HE, Jun SUN, Satoshi NAOI