公开(公告)号：US09179039B2

公开(公告)日：2015-11-03

申请号：US14179111

申请日：2014-02-12

Applicant: Xerox Corporation

Inventor： David J. Metcalfe ,  Ryan D. Metcalfe

IPC: H04N1/405 ,  H04N1/40 ,  H04N1/409 ,  G06K15/02 ,  G06F3/12

CPC classification number: H04N1/4052 ,  H04N1/393 ,  H04N1/4053

Abstract: Methods and systems for processing a low resolution image via a low resolution error diffusion algorithm. A low resolution binary output pixel can be generated utilizing a general error diffusion algorithm. The low-resolution binary output pixel can be converted to a predetermined number of interpolated sub-pixel values and each interpolated sub-pixel values can be compared with a threshold in order to generate a scaled slow-scan output pixel utilizing the low resolution error diffusion algorithm. The low resolution error diffusion algorithm includes a highlight threshold adjustment module that adjusts level in order to prevent the scaled slow-scan output pixel from firing around the low resolution binary output pixel within a highlight region. A slow scan error with respect to the scaled slow-scan output pixel can be distributed and stored via error diffusion filter coefficients within an error buffer without additional memory.

Abstract translation: 通过低分辨率误差扩散算法处理低分辨率图像的方法和系统。 可以利用一般的误差扩散算法来生成低分辨率二进制输出像素。 可以将低分辨率二进制输出像素转换成预定数量的内插子像素值，并且可以将每个内插子像素值与阈值进行比较，以便利用低分辨率误差扩散来生成缩放的慢扫描输出像素 算法。 低分辨率误差扩散算法包括高亮度阈值调整模块，其调整电平，以防止缩放的慢扫描输出像素围绕高亮区域内的低分辨率二进制输出像素点燃。 相对于缩放的慢扫描输出像素的慢扫描误差可以通过错误扩散滤波器系数分布并存储在错误缓冲器内而不需要额外的存储器。

公开(公告)号：US20150229807A1

公开(公告)日：2015-08-13

申请号：US14179111

申请日：2014-02-12

Applicant: Xerox Corporation

Inventor： David J. Metcalfe ,  Ryan D. Metcalfe

IPC: H04N1/405

CPC classification number: H04N1/4052 ,  H04N1/393 ,  H04N1/4053

Abstract: Methods and systems for processing a low resolution image via a low resolution error diffusion algorithm. A low resolution binary output pixel can be generated utilizing a general error diffusion algorithm. The low-resolution binary output pixel can be converted to a predetermined number of interpolated sub-pixel values and each interpolated sub-pixel values can be compared with a threshold in order to generate a scaled slow-scan output pixel utilizing the low resolution error diffusion algorithm. The low resolution error diffusion algorithm includes a highlight threshold adjustment module that adjusts the threshold level in order to prevent the scaled slow-scan output pixel from firing around the low resolution binary output pixel within a highlight region. A slow scan error with respect to the scaled slow-scan output pixel can be distributed and stored via error diffusion filter coefficients within an error buffer without additional memory.

Abstract translation: 通过低分辨率误差扩散算法处理低分辨率图像的方法和系统。 可以利用一般的误差扩散算法来生成低分辨率二进制输出像素。 可以将低分辨率二进制输出像素转换成预定数量的内插子像素值，并且可以将每个内插子像素值与阈值进行比较，以便利用低分辨率误差扩散来生成缩放的慢扫描输出像素 算法。 低分辨率误差扩散算法包括调整阈值电平的高亮度阈值调节模块，以便防止缩放的慢扫描输出像素围绕高亮区域内的低分辨率二进制输出像素点燃。 相对于缩放的慢扫描输出像素的慢扫描误差可以通过错误扩散滤波器系数分布并存储在错误缓冲器内而不需要额外的存储器。

公开(公告)号：US09679356B2

公开(公告)日：2017-06-13

申请号：US14662366

申请日：2015-03-19

Applicant: Xerox Corporation

Inventor： Ryan D. Metcalfe ,  David J. Metcalfe

IPC: G06T3/40

CPC classification number: G06T3/4007

Abstract: Image scaling disclosed herein comprises receiving an image from an image capturing device and partitioning an image into at least one image tile using a partitioning module. A determination is made if the image tile requires slow scan scaling and/or fast scan scaling. The image tile is subject to slow scan scaling. The image tile is then transposed, scaled in the fast scan direction, and then again transposed to an original orientation. The tile is reassembled into a scaled image and may be rendered by a rendering device.

公开(公告)号：US20160275644A1

公开(公告)日：2016-09-22

申请号：US14662366

申请日：2015-03-19

Applicant: Xerox Corporation

Inventor： Ryan D. Metcalfe ,  David J. Metcalfe

IPC: G06T3/40 ,  G06T7/00

CPC classification number: G06T3/4007

Abstract: Image scaling disclosed herein comprises receiving an image from an image capturing device and partitioning an image into at least one image tile using a partitioning module. A determination is made if the image tile requires slow scan scaling and/or fast scan scaling. The image tile is subject to slow scan scaling. The image tile is then transposed, scaled in the fast scan direction, and then again transposed to an original orientation. The tile is reassembled into a scaled image and may be rendered by a rendering device.

Abstract translation: 本文公开的图像缩放包括从图像捕获装置接收图像并且使用分区模块将图像划分为至少一个图像块。 如果图像块需要慢速扫描缩放和/或快速扫描缩放，则确定。 图像瓦片受到慢扫描缩放。 然后将图像块转置，在快速扫描方向上缩放，然后再次转置到原始方向。 瓦片被重新组装成缩放的图像，并且可以由渲染设备呈现。