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    • 44. 发明授权
    • Apparatus and method for image processing, and storage medium
    • 图像处理装置和方法以及存储介质
    • US07125095B2
    • 2006-10-24
    • US10939883
    • 2004-09-14
    • Akitoshi YamadaMasao KatoMitsuhiro OnoFumitaka Goto
    • Akitoshi YamadaMasao KatoMitsuhiro OnoFumitaka Goto
    • B41J29/393
    • B41J29/40
    • When a plurality of sheets of images are laid out and outputted in one page and characteristic amounts of multivalued image data are obtained to perform preferable image correction, the characteristic amounts of all the images to be recorded in the corresponding page have been beforehand obtained to calculate preferable image correction parameters. Therefore, a waiting time until the start of actual printing has been long. To resolve such an inconvenience, an image processing apparatus of the present invention includes a correction amount deciding unit for deciding or determining an individual correction amount with respect to each of the plurality of image data, and a correcting unit for correcting the image data based on the individual correction amount, whereby the correcting unit respectively corrects the images in accordance with the correction amounts which have already been decided, in a state where the correction amount deciding unit has not completed the decision of the correction amounts for all of the image data.
    • 当在一页中布置并输出多页图像并获得特征量的多值图像数据以执行优选的图像校正时,预先获得要记录在对应页面中的所有图像的特征量,以计算 优选的图像校正参数。 因此,直到实际打印开始的等待时间已经很长。 为了解决这种不便,本发明的图像处理装置包括校正量判定单元,用于根据多个图像数据中的每一个来判定或确定各个修正量,以及校正单元,用于基于 各个校正量,其中校正单元在校正量确定单元尚未完成对所有图像数据的校正量的判定的状态下,根据已经确定的校正量分别校正图像。
    • 48. 发明授权
    • Image processing to perform error diffusion with dots formed based color component values and their sum relative to a threshold
    • 图像处理,以基于颜色分量值形成的点进行误差扩散及其相对于阈值的和
    • US07859723B2
    • 2010-12-28
    • US12431624
    • 2009-04-28
    • Akitoshi YamadaHiromitsu HirabayashiMasao Kato
    • Akitoshi YamadaHiromitsu HirabayashiMasao Kato
    • H04N1/52
    • H04N1/52
    • Image processing apparatus and image processing method for formation of high quality image by high-speed error diffusion processing by execution of more complicated threshold condition processing in a simple manner. When error diffusion processing is performed on multivalued image data having plural density components and the result of processing is outputted, upon execution of error diffusion processing on a first density component among the plural density components, a threshold value used in the error diffusion processing is determined based on a density value of a second density component, then the error diffusion processing is performed on the first density component based on the determined threshold value, and the result of execution of the error diffusion processing is outputted. Further, upon execution of the error diffusion processing on the second density component among the plural density components, a threshold value used in the error diffusion processing is determined based on a density value of the first density component, then the error diffusion processing is performed on the second density component based on the determined threshold value, and the result of the error diffusion processing is outputted.
    • 通过以简单的方式执行更复杂的阈值条件处理,通过高速误差扩散处理形成高质量图像的图像处理装置和图像处理方法。 当对具有多个浓度分量的多值图像数据执行误差扩散处理并且输出处理结果时,在对多个浓度分量中的第一密度分量执行误差扩散处理时,确定在误差扩散处理中使用的阈值 基于第二密度分量的密度值,然后基于所确定的阈值对第一密度分量执行误差扩散处理,并且输出误差扩散处理的执行结果。 此外,在对多个密度分量中的第二密度分量执行误差扩散处理之后,基于第一密度分量的密度值来确定误差扩散处理中使用的阈值,然后进行误差扩散处理 输出基于所确定的阈值的第二密度分量和误差扩散处理的结果。