公开(公告)号：US20150015905A1

公开(公告)日：2015-01-15

申请号：US14315104

申请日：2014-06-25

申请人： CANON KABUSHIKI KAISHA

发明人： Takuya Tsunemi ,  Hiroki Horikoshi ,  Shigeru Fujita ,  Hideki Takemura ,  Akira Ichimura

IPC分类号： G06F3/12 ,  G06K15/02 ,  B41J2/07

CPC分类号： G06F3/1202 ,  B41J2/07 ,  G06F3/1294 ,  G06F13/28 ,  G06K15/1803 ,  G06K15/1817

摘要： An apparatus comprising a first transfer unit configured to DMA-transfer input data to a holding unit, a second transfer unit configured to DMA-transfer the input data held by the holding unit to at least one unit, a notification unit configured to notify, in accordance with the DMA transferring of the first transfer unit, that the input data held by the holding unit is updated, and a transfer control unit configured to control so as to operate the second transfer unit in one of a first mode for transferring the input data from the holding unit to the at least one unit in response to the notification and a second mode for transferring the input data independently of the notification, wherein the transfer unit performs the switching to the second mode after the operation in the first mode.

摘要翻译： 一种装置，包括：第一传送单元，被配置为将输入数据DMA传送到保持单元;第二传送单元，被配置为将保持单元保持的输入数据DMA传送到至少一个单元;通知单元， 根据第一传送单元的DMA传送，保持单元保持的输入数据被更新，以及传送控制单元，被配置为以用于传送输入数据的第一模式之一来操作第二传送单元 响应所述通知从所述保持单元到所述至少一个单元，以及用于独立于所述通知传送所述输入数据的第二模式，其中所述传送单元在所述第一模式中的操作之后执行到所述第二模式的切换。

公开(公告)号：US09019521B2

公开(公告)日：2015-04-28

申请号：US14315104

申请日：2014-06-25

申请人： Canon Kabushiki Kaisha

发明人： Takuya Tsunemi ,  Hiroki Horikoshi ,  Shigeru Fujita ,  Hideki Takemura ,  Akira Ichimura

IPC分类号： G06F15/00 ,  G06F3/12 ,  B41J2/07 ,  G06K15/02

CPC分类号： G06F3/1202 ,  B41J2/07 ,  G06F3/1294 ,  G06F13/28 ,  G06K15/1803 ,  G06K15/1817

摘要： An apparatus comprising a first transfer unit configured to DMA-transfer input data to a holding unit, a second transfer unit configured to DMA-transfer the input data held by the holding unit to at least one unit, a notification unit configured to notify, in accordance with the DMA transferring of the first transfer unit, that the input data held by the holding unit is updated, and a transfer control unit configured to control so as to operate the second transfer unit in one of a first mode for transferring the input data from the holding unit to the at least one unit in response to the notification and a second mode for transferring the input data independently of the notification, wherein the transfer unit performs the switching to the second mode after the operation in the first mode.

摘要翻译： 一种装置，包括：第一传送单元，被配置为将输入数据DMA传送到保持单元;第二传送单元，被配置为将保持单元保持的输入数据DMA传送到至少一个单元;通知单元， 根据第一传送单元的DMA传送，保持单元保持的输入数据被更新，以及传送控制单元，被配置为以用于传送输入数据的第一模式之一来操作第二传送单元 响应所述通知从所述保持单元到所述至少一个单元，以及用于独立于所述通知传送所述输入数据的第二模式，其中所述传送单元在所述第一模式中的操作之后执行到所述第二模式的切换。

公开(公告)号：US09384431B2

公开(公告)日：2016-07-05

申请号：US14244120

申请日：2014-04-03

申请人： CANON KABUSHIKI KAISHA

发明人： Hideki Takemura

IPC分类号： G06K15/02 ,  H04N1/405

CPC分类号： G06K15/1881 ,  H04N1/4052

摘要： An apparatus includes an image processing circuit to perform quantizing processing of image data, which has a plurality of rasters, each of which is formed with a plurality of pixels, by an error diffusion method, to generate print data. The image processing circuit is capable of performing quantizing processing of image data for N colors, and performs the quantizing processing multiple times in image processing of image data for colors more than N colors. In a case when the image processing circuit performs image processing for image data for colors more than the N colors, the image processing circuit repeatedly performs at least first image processing for performing image processing of image data of a first color group and second image processing for performing image processing of image data of a second color group for each band.

摘要翻译： 一种装置包括：图像处理电路，通过误差扩散方法对具有多个像素的多个光栅执行图像数据的量化处理，以产生打印数据。 图像处理电路能够对N种颜色的图像数据进行量化处理，并且对于多于N种颜色的图像数据的图像数据的图像处理多次执行量化处理。 在图像处理电路对颜色多于N色的图像数据进行图像处理的情况下，图像处理电路重复执行用于对第一颜色组和第二图像处理的图像数据进行图像处理的至少第一图像处理 对每个频带执行第二颜色组的图像数据的图像处理。

公开(公告)号：US20140218770A1

公开(公告)日：2014-08-07

申请号：US14244120

申请日：2014-04-03

申请人： CANON KABUSHIKI KAISHA

发明人： Hideki Takemura

IPC分类号： G06K15/02

CPC分类号： G06K15/1881 ,  H04N1/4052

摘要： In an image processing apparatus, fast error diffusion processing is performed without increasing the size of an error diffusion processing circuit, even in cases where the print data to be generated is 12 colors data or similarly large data. More specifically, with quantization by error diffusion, binarized image data for 12 colors is obtained by causing an image processing circuit that executes 6 colors quantization processing to operate twice. At this point, RAM realized by DRAM with comparatively slow operating speeds, for example, is accessed for error data diffused to a first raster and error data diffused from a last raster. In contrast, an error buffer realized by SRAM inside the image processing circuit with fast operating speeds is accessed for all other error data. Thus, as a result, memory access speeds for reading out and writing error data can be improved overall.

摘要翻译： 在图像处理装置中，即使在要生成的打印数据为12色数据或类似大数据的情况下，也不进行误差扩散处理电路的大小，进行快速误差扩散处理。 更具体地，通过误差扩散量化，通过使执行6色量化处理的图像处理电路进行两次操作来获得12色的二值化图像数据。 此时，例如访问比较慢的操作速度的由DRAM实现的RAM，用于扩散到第一光栅的误差数据和从最后的光栅扩散的误差数据。 相反，对于所有其他错误数据，可访问由具有快速操作速度的图像处理电路内的SRAM实现的错误缓冲器。 因此，可以总体上改善用于读出和写入错误数据的存储器访问速度。