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1. 发明申请

US20070019056A1 Method for detecting misregistration in an image forming apparatus 审中-公开
标题翻译：用于检测图像形成装置中的对准不良的方法
公开(公告)号：US20070019056A1
公开(公告)日：2007-01-25
申请号：US11430864
申请日：2006-05-10
申请人： Hyun-sun Jung , Hasegawa Jun
发明人： Hyun-sun Jung , Hasegawa Jun
IPC分类号： G03G15/01
CPC分类号： G03G15/5062 , G03G15/0194 , G03G2215/0161
摘要： A method for detecting misregistration of an image forming apparatus having a plurality of cartridges. The method includes forming a first pattern using one of the plurality of cartridges, the first pattern comprising a plurality of lines that are arranged parallel to one another and incline in one direction by a predetermined angle, forming a second pattern using another cartridge, the second pattern comprising a plurality of lines that are arranged at the same intervals as those of the first pattern, the second pattern being symmetrical to the first pattern, forming critical points on the end most line of at least one of the first and the second patterns in opposite directions away from a center of the end most line by a predetermined distance, and overlapping the first and the second patterns and estimating a degree of misregistration between the first and the second patterns. Accordingly, it is possible to accurately detect the vertical and the horizontal misregistration and also to estimate the degrees of misregistrations as numerical values.
摘要翻译：一种用于检测具有多个盒的图像形成装置的重合失调的方法。所述方法包括使用所述多个盒中的一个形成第一图案，所述第一图案包括彼此平行布置并沿一个方向倾斜预定角度的多个线，使用另一个盒形成第二图案，所述第二图案图案包括以与第一图案相同的间隔布置的多条线，第二图案与第一图案对称，在第一和第二图案中的至少一个图案的最末行上形成关键点，相对方向远离最终行的中心一预定距离，并且与第一和第二图案重叠并且估计第一和第二图案之间的重合失调程度。因此，可以精确地检测垂直和水平重合失调，并且还可以将不对准程度估计为数值。

2. 发明申请

US20080239352A1 IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF 审中-公开
标题翻译：图像形成装置及其控制方法
公开(公告)号：US20080239352A1
公开(公告)日：2008-10-02
申请号：US12056425
申请日：2008-03-27
申请人： Hasegawa Jun
发明人： Hasegawa Jun
IPC分类号： G06K1/00
CPC分类号： H04N1/40012 , H04N1/405
摘要： An image forming apparatus and a control method thereof expresses a color difference of a printed document when a color document is printed through the monochrome printing even if the printed document has the same brightness value. The image forming apparatus includes a brightness and chromatic value calculation unit to calculate a brightness value and first and second chromatic values of a pixel, an edge determination unit to determine whether the calculated brightness value and first and second chromatic values represent edgeness of the pixel, a degeneracy determination unit to determine degeneracy of the pixel, a halftone screen pattern unit to store first and second halftone screen patterns having first and second threshold values, and a binarization processing unit to perform binarization processing by comparing the first and second threshold values with the brightness value according to the degeneracy of the pixel.
摘要翻译：图像形成装置及其控制方法表示当通过单色打印打印彩色文档时打印文档的色差，即使打印文档具有相同的亮度值。图像形成装置包括亮度和色值计算单元，用于计算像素的亮度值和第一和第二彩色值，边缘确定单元，用于确定所计算的亮度值和第一和第二色度值是否表示像素的渐近，用于确定像素的简并性的简并确定单元，用于存储具有第一和第二阈值的第一和第二半色调屏幕图案的半色调屏幕图案单元和二值化处理单元，用于通过将第一和第二阈值与亮度值根据像素的简并性。

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