Patents by Inventor Keigo Hirakawa
Keigo Hirakawa 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).
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Patent number: 11923069Abstract: A feature information acquisition unit acquires the first feature information on the first medical image and second feature information on the second medical image having an imaging time different from an imaging time of the first medical image. A sentence creation unit compares the first feature information and the second feature information generated by the feature information acquisition unit, and creates a sentence representing a change between the first medical image and the second medical image. A display control unit causes the display unit to display a sentence representing a change.Type: GrantFiled: October 19, 2020Date of Patent: March 5, 2024Assignee: FUJIFILM CorporationInventors: Keigo Nakamura, Shinnosuke Hirakawa, Yohei Momoki
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Patent number: 11582467Abstract: A method for processing image or video data is performed in an image processing pipeline. Color filtered mosaiced raw image or video data is received. A one-level wavelet transform of subbands of the color filtered mosaiced raw image or video data to provide LL, HH, LH and HL subbands. The LH and HL subbands are de-correlated by summing and difference operations to provide decorrelated sum and difference subbands. Additional n-level wavelet transformation on the sum and difference subbands and the LL and HH subbands to provide sparsified subbands for encoding. LL and HH and sum subbands are recombined into standard color images e.g., red, green, and blue color components, which are subsequently processed by color correction, white balance, and gamma correction. The sparsified subbands are encoded.Type: GrantFiled: July 16, 2019Date of Patent: February 14, 2023Assignees: The Regents of the University of California, University of DaytonInventors: Truong Nguyen, Yee Jin Lee, Keigo Hirakawa
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Patent number: 11288537Abstract: A system and process to determine whether a digital image has been manipulated involves determining expected locations of non-standard pixels in the digital image, and determining a feature for evaluating the non-standard pixels. The feature in pixels of the digital image that are located at the expected locations of non-standard pixels is then measured, and a statistical measure of the feature of pixels in the digital image that are located at the expected locations of non-standard pixels is evaluated. The digital image is assessed to determine a probability that the digital image includes a manipulated portion, based on the statistical measure. The system and process can also determine a make and model of an image sensing device via an examination of the non-standard pixels.Type: GrantFiled: February 7, 2020Date of Patent: March 29, 2022Assignee: Honeywell International Inc.Inventors: Scott McCloskey, Keigo Hirakawa
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Publication number: 20200257929Abstract: A system and process to determine whether a digital image has been manipulated involves determining expected locations of non-standard pixels in the digital image, and determining a feature for evaluating the non-standard pixels. The feature in pixels of the digital image that are located at the expected locations of non-standard pixels is then measured, and a statistical measure of the feature of pixels in the digital image that are located at the expected locations of non-standard pixels is evaluated. The digital image is assessed to determine a probability that the digital image includes a manipulated portion, based on the statistical measure. The system and process can also determine a make and model of an image sensing device via an examination of the non-standard pixels.Type: ApplicationFiled: February 7, 2020Publication date: August 13, 2020Inventors: Scott McCloskey, Keigo Hirakawa
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Publication number: 20200021823Abstract: A method for processing image or video data is performed in an image processing pipeline. Color filtered mosaiced raw image or video data is received. A one-level wavelet transform of subbands of the color filtered mosaiced raw image or video data to provide LL, HH, LH and HL subbands. The LH and HL subbands are de-correlated by summing and difference operations to provide decorrelated sum and difference subbands. Additional n-level wavelet transformation on the sum and difference subbands and the LL and HH subbands to provide sparsified subbands for encoding. LL and HH and sum subbands are recombined into standard color images e.g., red, green, and blue color components, which are subsequently processed by color correction, white balance, and gamma correction. The sparsified subbands are encoded.Type: ApplicationFiled: July 16, 2019Publication date: January 16, 2020Inventors: Truong Nguyen, Yee Jin Lee, Keigo Hirakawa
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Patent number: 10147361Abstract: Display devices and methods for making and driving the display devices are provided. In one example, a device for driving a display panel including an array of pixels includes a timing controller. Each of the pixels includes a first light emitting element and a second light emitting element. The timing controller is configured to provide a first set of timing control signals for coordinating timing of gate scanning and timing of writing display data into the array of pixels. The timing controller is further configured to provide a second set of timing control signals for controlling timing of emitting light by the first and second light emitting elements of the array of pixels such that the first light emitting elements emit light in a first light emitting period and the second light emitting elements emit light in a second light emitting period, alternatively.Type: GrantFiled: August 2, 2017Date of Patent: December 4, 2018Assignee: KUNSHAN YUNYINGGU ELECTRONIC TECHNOLOGY CO., LTD.Inventors: Jing Gu, Xixi Luo, Keigo Hirakawa
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Patent number: 9857226Abstract: An integrated microgrid imaging polarimeter comprises a repeating pattern of wiregrid polarizers in a new 2×4 array that improves image resolution and quality by increasing the spatial bandwidth available for each Stokes image despite that the new repeating pattern is larger than prior art 2×2 arrays. An example embodiment has polarization orientations of the wiregrid polarizers in each 2×4 array, beginning from an arbitrary top left polarizer of each array and continuing clockwise, as: 45 degrees; zero degrees; 315 degrees; 90 degrees; zero degrees; 45 degrees; 90 degrees; and, 315 degrees. The disclosure includes an analysis showing development of the new 2×4 array and supporting its improved performance over prior art 2×2 arrays.Type: GrantFiled: February 10, 2015Date of Patent: January 2, 2018Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Daniel A. LeMaster, Keigo Hirakawa
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Publication number: 20170330517Abstract: Display devices and methods for making and driving the display devices are provided. In one example, a device for driving a display panel including an array of pixels includes a timing controller. Each of the pixels includes a first light emitting element and a second light emitting element. The timing controller is configured to provide a first set of timing control signals for coordinating timing of gate scanning and timing of writing display data into the array of pixels. The timing controller is further configured to provide a second set of timing control signals for controlling timing of emitting light by the first and second light emitting elements of the array of pixels such that the first light emitting elements emit light in a first light emitting period and the second light emitting elements emit light in a second light emitting period, alternatively.Type: ApplicationFiled: August 2, 2017Publication date: November 16, 2017Inventors: Jing GU, Xixi Luo, Keigo Hirakawa
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Patent number: 9761166Abstract: Display devices and methods for making and driving the display devices. In one example, a device for display includes an array of pixels for display. Each of the pixels includes a first light emitting element and a second light emitting element. The first light emitting element is formed on a substrate. The second light emitting element is formed on the first light emitting element. The first and second light emitting elements share a same electrode.Type: GrantFiled: January 5, 2013Date of Patent: September 12, 2017Assignee: SHENZHEN YUNYINGGU TECHNOLOGY CO., LTD.Inventors: Jing Gu, Xixi Luo, Keigo Hirakawa
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Publication number: 20160231177Abstract: An integrated microgrid imaging polarimeter comprises a repeating pattern of wiregrid polarizers in a new 2×4 array that improves image resolution and quality by increasing the spatial bandwidth available for each Stokes image despite that the new repeating pattern is larger than prior art 2×2 arrays. An example embodiment has polarization orientations of the wiregrid polarizers in each 2×4 array, beginning from an arbitrary top left polarizer of each array and continuing clockwise, as: 45 degrees; zero degrees; 315 degrees; 90 degrees; zero degrees; 45 degrees; 90 degrees; and, 315 degrees. The disclosure includes an analysis showing development of the new 2×4 array and supporting its improved performance over prior art 2×2 arrays.Type: ApplicationFiled: February 10, 2015Publication date: August 11, 2016Inventors: Daniel A. LeMaster, Keigo Hirakawa
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Patent number: 9165526Abstract: An apparatus including a display and control logic is provided. In one example, the display includes an array of subpixels having a subpixel repeating group tiled across the display in a regular pattern. The subpixel repeating group comprises n rows of subpixels and n columns of subpixels. Each row of the subpixel repeating group comprises n types of subpixels. Each column of the subpixel repeating group comprises the n types of subpixels. Subpixels along each diagonal direction of the subpixel repeating group comprise at least two types of the n types of subpixels. The control logic is operatively coupled to the display and is configured to receive display data and render the display data into control signals for driving the array of subpixels of the display.Type: GrantFiled: February 28, 2012Date of Patent: October 20, 2015Assignee: SHENZHEN YUNYINGGU TECHNOLOGY CO., LTD.Inventors: Jing Gu, Keigo Hirakawa
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Patent number: 9143687Abstract: A method of processing a motion blurred image from an imaging device to recover a latent sharp image. The method includes capturing a motion blurred image signal through the imaging device, computing a second signal as a two-dimensional wavelet transform of the motion blurred image signal, and using the second signal to perform a first autocorrelation analysis to estimate the blur kernel. After estimating the blur kernel, a local autocorrelation analysis yields a blur kernel length and direction at each pixel location of the motion blurred image. In addition, the second signal is denoised and the discrete wavelet transform coefficients reconstructed from the blur kernel length and direction. Performing an inverse discrete wavelet transform of the discrete wavelet transform coefficients recovers the latent sharp image.Type: GrantFiled: March 14, 2013Date of Patent: September 22, 2015Assignee: University of DaytonInventors: Keigo Hirakawa, Yi Zhang
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Publication number: 20150255012Abstract: Display devices and methods for making and driving the display devices. In one example, a device for display includes an array of pixels for display. Each of the pixels includes a first light emitting element and a second light emitting element. The first light emitting element is formed on a substrate. The second light emitting element is formed on the first light emitting element. The first and second light emitting elements share a same electrode.Type: ApplicationFiled: January 5, 2013Publication date: September 10, 2015Inventors: Jing Gu, Xixi Luo, Keigo Hirakawa
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Patent number: 9055178Abstract: A method for generating a high dynamic range image. An image is captured using a Bayer pattern color filter array to generate raw pixel sensor data for the image. The pixel sensor data is separated into highpass (ZiHP) and lowpass (ZiLP) components. The color components of ZiHP are pooled to yield an achromatic highpass data set {circumflex over (X)}iHP. Saturated pixels in the ZiLP components are corrected by borrowing across spectrums to yield the low pass data set {circumflex over (X)}iLP, and the high dynamic range image is computed as {circumflex over (X)}={circumflex over (X)}iLP+{circumflex over (X)}iHP 1. A camera system incorporating this method is also provided.Type: GrantFiled: August 30, 2012Date of Patent: June 9, 2015Assignee: University of DaytonInventor: Keigo Hirakawa
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Patent number: 8761504Abstract: Presented are new alternatives to the Bayer pattern for spatial subsampling in color imaging. One aspect relates to a new design paradigm for spatio-spectral sampling The proposed scheme offers the potential to significantly reduce hardware complexity in a wide variety of applications, while at the same time improving output color image quality. In some embodiments, a framework for CFA design in presented. In one embodiment the physical characteristics of the CFA are generated so that the spectral radii of luminance and chrominance channels are maximized. The physical characteristics of CFA design are constrained to require physically realizable CFA(s). Alternatively, certain physical characteristics can be emphasized to generate easier to manufacture CFA(s).Type: GrantFiled: November 29, 2007Date of Patent: June 24, 2014Assignee: President and Fellows of Harvard CollegeInventors: Keigo Hirakawa, Patrick J. Wolfe
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Publication number: 20130271616Abstract: A method of processing a motion blurred image from an imaging device to recover a latent sharp image. The method includes capturing a motion blurred image signal through the imaging device, computing a second signal as a two-dimensional wavelet transform of the motion blurred image signal, and using the second signal to perform a first autocorrelation analysis to estimate the blur kernel. After estimating the blur kernel, a local autocorrelation analysis yields a blur kernel length and direction at each pixel location of the motion blurred image. In addition, the second signal is denoised and the discrete wavelet transform coefficients reconstructed from the blur kernel length and direction. Performing an inverse discrete wavelet transform of the discrete wavelet transform coefficients recovers the latent sharp image.Type: ApplicationFiled: March 14, 2013Publication date: October 17, 2013Inventors: Keigo Hirakawa, Yi Zhang
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Publication number: 20130222442Abstract: An apparatus including a display and control logic is provided. In one example, the display includes an array of subpixels having a subpixel repeating group tiled across the display in a regular pattern. The subpixel repeating group comprises n rows of subpixels and n columns of subpixels. Each row of the subpixel repeating group comprises n types of subpixels. Each column of the subpixel repeating group comprises the n types of subpixels. Subpixels along each diagonal direction of the subpixel repeating group comprise at least two types of the n types of subpixels. The control logic is operatively coupled to the display and is configured to receive display data and render the display data into control signals for driving the array of subpixels of the display.Type: ApplicationFiled: February 28, 2012Publication date: August 29, 2013Inventors: Jing Gu, Keigo Hirakawa
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Publication number: 20130076947Abstract: A method for generating a high dynamic range image. An image is captured using a Bayer pattern color filter array to generate raw pixel sensor data for the image. The pixel sensor data is separated into highpass (ZiHP) and lowpass (ZiLP) components. The color components of ZiHP are pooled to yield an achromatic highpass data set {circumflex over (X)}1HP. Saturated pixels in the Z1LP components are corrected by borrowing across spectrums to yield the low pass data set {circumflex over (X)}1LP, and the high dynamic range image is computed as {circumflex over (X)}={circumflex over (X)}iLP+{circumflex over (X)}iHP 1. A camera system incorporating this method is also provided.Type: ApplicationFiled: August 30, 2012Publication date: March 28, 2013Inventor: Keigo Hirakawa
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Publication number: 20100092082Abstract: One aspect of the present invention relates to a new approach to the demosaicing of spatially sampled image data observed through a color filter array. In one embodiment properties of Smith-Barnwell filterbanks may be employed to exploit the correlation of color components in order to reconstruct a sub-sampled image. In other embodiments, the approach is amenable to wavelet-domain denoising prior to demosaicing. One aspect of the present invention relates to a framework for applying existing image denoising algorithms to color filter array data. In addition to yielding new algorithms for denoising and demosaicing, in some embodiments, this framework enables the application of other wavelet-based denoising algorithms directly to the CFA image data.Type: ApplicationFiled: November 29, 2007Publication date: April 15, 2010Inventors: Keigo Hirakawa, Xiao-Li Meng, Patrick J. Wolfe
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Publication number: 20100085452Abstract: One aspect of the present invention relates to a new alternative to the Bayer pattern for spatial subsampling in color imaging applications. One aspect of the present invention relates to a new design paradigm for spatio-spectral sampling, which is also described. The proposed scheme offers the potential to significantly reduce hardware complexity in a wide variety of applications, while at the same time improving output color image quality. According to another aspect, it is realized that conventional processing techniques are subject to diminishing returns, and with the exception of the most sophisticated processing techniques generate imperfections perceptible to a practiced eye. According to one aspect, a framework for CFA design in presented. In one embodiment the physical characteristics of the CFA are generated so that the spectral radii of luminance and chrominance channels are maximized. In another embodiment, the CFA designed to subject to the conditions of perfect reconstruction.Type: ApplicationFiled: November 29, 2007Publication date: April 8, 2010Inventors: Keigo Hirakawa, Patrick J. Wolfe