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1.发明申请公开(公告)号：US20200234416A1
公开(公告)日：2020-07-23
申请号：US16838637
申请日：2020-04-02
申请人： NEC Platforms, Ltd.
发明人： Shou YAZAWA , Yukio YOSHIOKA
摘要： In an image data conversion device, color image data is represented in gray scale, a histogram of brightness values is created for the gray-scaled image data, it is determined based on the created histogram which image pattern of a plurality of image patterns the gray-scaled image data is classified into, a range subjected to gamma correction and a range fixed to at least one of a minimum value and a maximum value of gray scale are set for each image pattern, and image data conversion including the gamma correction is performed on the gray-scaled image data.
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2.发明申请公开(公告)号：US20190035065A1
公开(公告)日：2019-01-31
申请号：US16070093
申请日：2016-12-14
申请人： NEC Platforms, Ltd.
发明人： Shou YAZAWA , Yukio YOSHIOKA
摘要： In an image data conversion device, color image data is represented in gray scale, a histogram of brightness values is created for the gray-scaled image data, it is determined based on the created histogram which image pattern of a plurality of image patterns the gray-scaled image data is classified into, a range subjected to gamma correction and a range fixed to at least one of a minimum value and a maximum value of gray scale are set for each image pattern, and image data conversion including the gamma correction is performed on the gray-scaled image data.
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3.发明申请公开(公告)号：US20200234415A1
公开(公告)日：2020-07-23
申请号：US16838599
申请日：2020-04-02
申请人： NEC Platforms, Ltd.
发明人： Shou YAZAWA , Yukio YOSHIOKA
摘要： In an image data conversion device, color image data is represented in gray scale, a histogram of brightness values is created for the gray-scaled image data, it is determined based on the created histogram which image pattern of a plurality of image patterns the gray-scaled image data is classified into, a range subjected to gamma correction and a range fixed to at least one of a minimum value and a maximum value of gray scale are set for each image pattern, and image data conversion including the gamma correction is performed on the gray-scaled image data.
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公开(公告)号：US20190291481A1
公开(公告)日：2019-09-26
申请号：US16317888
申请日：2017-07-11
申请人： NEC Platforms, Ltd.
发明人： Shou YAZAWA , Yukio YOSHIOKA
摘要： A printer is provided with a roll paper holding portion that holds roll paper without axially supporting the roll paper; a sheet conveying unit that conveys a sheet supplied from the roll paper, a printing unit that executes printing on the sheet; and a roll paper pressing unit that presses the roll paper held in the roll paper holding portion, wherein the roll paper pressing unit is provided with a pressing roller that presses the roll paper and rotates along with the sheet conveyance, and a rotation suppressing portion that suppresses the rotation of the pressing roller.
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公开(公告)号：US20190020785A1
公开(公告)日：2019-01-17
申请号：US16068539
申请日：2016-12-14
申请人： NEC Platforms, Ltd.
发明人： Shou YAZAWA , Yukio YOSHIOKA
CPC分类号： H04N1/40012 , B41J2/52 , H04N1/407 , H04N1/46 , H04N1/60
摘要： The present invention provides an image data conversion device that can convert color image data to black-and-white image data suitable for a background image. One example embodiment of the present invention is an image data conversion device that represents color image data in gray scale to convert the color image data to black-and-white image data and that includes determination means for determining whether or not the black-and-white image data is data used for a background image; and image data conversion means for converting the color image data to black-and-white image data using brightness values ranging from a background image minimum brightness value to a maximum brightness value when the black-and-white image data is data used for a background image.
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