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    • 32. 发明授权
    • Image forming apparatus having function for automatically adjusting image forming condition
    • 具有自动调整图像形成条件功能的图像形成装置
    • US06285839B1
    • 2001-09-04
    • US09251457
    • 1999-02-17
    • Masaki TanakaTetsuya SakaiFutoshi HamadaToshifumi Watanabe
    • Masaki TanakaTetsuya SakaiFutoshi HamadaToshifumi Watanabe
    • G03G1500
    • G03G15/5058G03G15/0194G03G2215/00042G03G2215/00059G03G2215/00063G03G2215/00067
    • A tandem-type image forming apparatus forms a color image by transferring images formed by a plurality of image forming units set along a transfer belt onto a recording sheet transported by the transfer belt. The tandem-type image forming apparatus includes a plurality of detecting units, each detecting a toner image formed by a corresponding image forming unit to obtain the amount of toner in the toner image, a standard pattern formation controlling unit for controlling one of the image forming units to form a standard pattern to be detected by the detecting units, a sensitivity obtaining unit for obtaining a value as an evaluation value that is outputted by each of the detecting units on detecting the standard pattern, and an detection output adjusting unit for adjusting a value outputted by the detecting unit in accordance with the evaluation value. An image forming condition is set for each of the image forming units in accordance with the adjusted value, and image formation is performed under the image forming conditions.
    • 串联型图像形成装置通过将由沿着转印带设置的多个图像形成单元形成的图像转印到由转印带传送的记录纸上而形成彩色图像。 串联型图像形成装置包括多个检测单元,每个检测单元检测由相应图像形成单元形成的调色剂图像以获得调色剂图像中的调色剂量;标准图案形成控制单元,用于控制图像形成 单元,以形成由检测单元检测的标准图案;灵敏度获取单元,用于获得作为每个检测单元在检测标准图案时输出的评估值的值;以及检测输出调整单元,用于调整 由检测单元根据评估值输出的值。 根据调整值为每个图像形成单元设置图像形成条件,并且在图像形成条件下执行图像形成。
    • 33. 发明授权
    • Image forming apparatus that reduces test toner cleaning
    • 减少测试墨粉清洁的图像形成设备
    • US06249656B1
    • 2001-06-19
    • US09150061
    • 1998-09-09
    • Toshifumi WatanabeYasuyuki Inada
    • Toshifumi WatanabeYasuyuki Inada
    • G03G1516
    • G03G15/5041G03G2215/00042G03G2215/1661
    • The object of the present invention is to reduce the burden with regard to cleaning of the test toner pattern formed during AIDC in an electrophotographic image forming apparatus. In order to attain said object, the present invention is an electrophotographic copying machine that transfers a toner image formed on a photoreceptor drum onto a sheet of paper conveyed on a conveyor belt, wherein where the toner density of the test toner pattern formed on the photoreceptor drum under prescribed image formation parameters is optically detected by a sensor, the transfer charger output is set to be lower than it is in image formation mode, and a portion of the test toner pattern is transferred onto the conveyor belt and then wiped off by a cleaner.
    • 本发明的目的是减少在电子照相成像设备中在AIDC期间形成的测试调色剂图案的清洁方面的负担。 为了实现上述目的,本发明是一种电子照相复印机,其将形成在感光鼓上的调色剂图像转印到在传送带上传送的纸张上,其中在感光体上形成的测试调色剂图案的调色剂浓度 在规定的图像形成参数下的鼓由传感器光学检测,转印充电器输出被设置为低于图像形成模式,并且将一部分测试调色剂图案转印到传送带上,然后通过 清洁器。
    • 35. 发明授权
    • Thresholding method for segmenting gray scale image, method for
determining background concentration distribution, and image
displacement detection method
    • 用于分割灰度图像的阈值法,确定背景浓度分布的方法和图像位移检测方法
    • US5555318A
    • 1996-09-10
    • US551811
    • 1995-11-07
    • Minoru ItoToshifumi Watanabe
    • Minoru ItoToshifumi Watanabe
    • G06K9/38G06T5/40G06T7/20G06K9/46
    • G06K9/38G06T7/0081G06T7/2013G06T2207/10016G06T2207/20148
    • In a thresholding method for segmenting gray scale image which is less dependent on the concentration distribution of the input image, the threshold in determined as a zero-cross point of a histogram difference between the concentration histograms for the gray scale image within the window at a window position at which the window contains more high concentration region and at a window position at which the window contains more low concentration region. Also, in a method of determining a background concentration distribution from an image having an arbitrarily distributed pattern, the background concentration level is determined as a peak concentration or a mean value concentration of a low concentration section of the histogram difference of the concentration histograms for two associated windows. Also, in an image displacement detection method capable of detecting a displacement of a pattern in a two dimensional image accurately by using only a one-dimensional pattern matching without any period mismatching error even for an image of a repetitious pattern, the discplacements in the vertical and lateral direction which are locally minimum and for which a discrepancy in an oblique direction is minimum are selected as the actual displacements.
    • 在用于分割较少依赖于输入图像的浓度分布的灰度图像的阈值方法中,阈值被确定为在窗口内的灰度图像的浓度直方图之间的直方图差的零交叉点 窗口位于窗口包含更高浓度区域的窗口位置以及窗口包含更低浓度区域的窗口位置。 此外,在从具有任意分布图案的图像确定背景浓度分布的方法中,将背景浓度水平确定为浓度直方图的两个浓度直方图的直方图差的低浓度部分的峰浓度或平均值浓度 关联的窗口。 另外,在图像位移检测方法中,即使对于重复图案的图像也能够通过仅使用没有任何周期不匹配误差的一维图案匹配来精确地检测二维图像中的图案的位移,所以在垂直方向上的位置 并且选择局部最小并且倾斜方向上的偏差最小的横向方向作为实际位移。
    • 36. 发明授权
    • Thresholding method for segmenting gray scale image, method for
determining background concentration distribution, and image
displacement detection method
    • 用于分割灰度图像的阈值法,确定背景浓度分布的方法和图像位移检测方法
    • US5506917A
    • 1996-04-09
    • US728587
    • 1991-07-11
    • Minoru ItoToshifumi Watanabe
    • Minoru ItoToshifumi Watanabe
    • G06K9/38G06T5/40G06T7/20G06K9/36
    • G06K9/38G06T7/0081G06T7/2013G06T2207/10016G06T2207/20148
    • In a thresholding method for segmenting gray scale image which is less dependent on the concentration distribution of the input image, the threshold in determined as a zero-cross point of a histogram difference between the concentration histograms for the gray scale image within the window at a window position at which the window contains more high concentration region and at a window position at which the window contains more low concentration region. Also, in a method of determining a background concentration distribution from an image having an arbitrarily distributed pattern, the background concentration level is determined as a peak concentration or a mean value concentration of a low concentration section of the histogram difference of the concentration histograms for two associated windows. Also. in an image displacement detection method capable of detecting a displacement of a pattern in a two dimensional image accurately by using only a one-dimensional pattern matching without any period mismatching error even for an image of a repetitious pattern, the discplacements in the vertical and lateral direction which are locally minimum and for which a discrepancy in an oblique direction is minimum are selected as the actual displacements.
    • 在用于分割较少依赖于输入图像的浓度分布的灰度图像的阈值方法中,阈值被确定为在窗口内的灰度图像的浓度直方图之间的直方图差的零交叉点 窗口位于窗口包含更高浓度区域的窗口位置以及窗口包含更低浓度区域的窗口位置。 此外,在从具有任意分布图案的图像确定背景浓度分布的方法中,将背景浓度水平确定为浓度直方图的两个浓度直方图的直方图差的低浓度部分的峰浓度或平均值浓度 关联的窗口。 也。 在图像位移检测方法中,即使对于重复图案的图像也能够通过仅使用没有任何周期不匹配误差的一维图案匹配来精确地检测二维图像中的图案的位移,所以在垂直和横向 选择局部最小的并且倾斜方向上的偏差最小的方向被选择为实际位移。