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    • 1. 发明申请
    • DENSITY DETECTION APPARATUS AND METHOD AND IMAGE FORMING APPARATUS
    • 密度检测装置和方法和图像形成装置
    • US20130242333A1
    • 2013-09-19
    • US13555893
    • 2012-07-23
    • Tomohisa SUZUKIToru IWANAMIMakoto HAMATSUWenxiang GEKenjo NAGATAHidefumi TANAKA
    • Tomohisa SUZUKIToru IWANAMIMakoto HAMATSUWenxiang GEKenjo NAGATAHidefumi TANAKA
    • G06K15/00
    • G03G15/0189G03G15/5054
    • A density detection apparatus includes the following elements. A storage unit stores therein image information. A measuring unit measures amounts of light components reflected by an image carrier or density detection images represented by the image information. A light amount obtaining unit obtains a variation in amounts of light components reflected by each region in which the associated density detection image is formed, and obtains, as a reference value, a representative value of the amounts of light components. An image correcting unit corrects the image information by changing an arrangement order of the density detection images. An image forming unit forms the density detection images on the image carrier on the basis of the corrected image information. A density obtaining unit obtains density levels of density detection images corresponding to their area ratios by using the amounts of light components reflected by the density detection images and the reference values.
    • 密度检测装置包括以下元件。 存储单元存储图像信息。 测量单元测量由图像载体反射的光分量或由图像信息表示的浓度检测图像的量。 光量获取单元获得由其中形成相关浓度检测图像的每个区域反射的光分量的变化,并且获得光分量量的代表值作为参考值。 图像校正单元通过改变浓度检测图像的排列顺序来校正图像信息。 图像形成单元基于校正图像信息在图像载体上形成浓度检测图像。 浓度获取单元通过使用由浓度检测图像和参考值反射的光分量的量来获得与其面积比对应的浓度检测图像的浓度水平。
    • 3. 发明申请
    • DENSITY DETECTION APPARATUS AND METHOD AND IMAGE FORMING APPARATUS
    • 密度检测装置和方法和图像形成装置
    • US20130201497A1
    • 2013-08-08
    • US13592777
    • 2012-08-23
    • Toru IWANAMITomohisa SUZUKIMakoto HAMATSUWenxiang GEKenjo NAGATAHidefumi TANAKA
    • Toru IWANAMITomohisa SUZUKIMakoto HAMATSUWenxiang GEKenjo NAGATAHidefumi TANAKA
    • G06F15/00
    • G03G15/0189G03G15/5058
    • A density detection apparatus includes the following elements. An image forming unit forms density detection images having different area ratios. A measuring unit measures an amount of reflected light. A storage unit stores reference values and also stores a representative value thereof. A determining unit determines a threshold for the area ratios of the density detection images on the basis of a variation among the reference values. A density obtaining unit obtains, for a density detection image having an area ratio which exceeds the threshold, a density level by using the amount of light reflected by the density detection image and the representative value, and obtains, for a density detection image having an area ratio which is equal to or smaller than the threshold, a density level by using the amount of light reflected by the density detection image, the associated reference value, and the representative value.
    • 密度检测装置包括以下元件。 图像形成单元形成具有不同面积比的浓度检测图像。 测量单元测量反射光量。 存储单元存储参考值并且还存储其代表值。 确定单元基于参考值之间的变化来确定浓度检测图像的面积比的阈值。 密度获取单元通过使用由浓度检测图像反射的光量和代表值来获得具有超过阈值的面积比的浓度检测图像的浓度水平,并且获得对于具有 面积比等于或小于阈值,通过使用由浓度检测图像反射的光量,相关联的参考值和代表值来确定浓度水平。
    • 4. 发明申请
    • IMAGE EVALUATION DEVICE AND IMAGE EVALUATION METHOD
    • 图像评估设备和图像评估方法
    • US20100142819A1
    • 2010-06-10
    • US12630314
    • 2009-12-03
    • Tomohisa SUZUKIHiroyuki Mizutani
    • Tomohisa SUZUKIHiroyuki Mizutani
    • G06K9/34
    • G06K9/522
    • An image evaluation device includes: a partial area extracting section extracting plural partial areas from an original image; an extracted image generating section generating an extracted image corresponding to each of the partial areas and having pixels whose pixel values correspond to a gradient of pixel values in the image; an autocorrelation calculating section calculating plural autocorrelation coefficients for each extracted images; a representative coefficient value calculating section calculating a representative coefficient value for each of the autocorrelation coefficients among the partial areas; and a checking section checking the quality of the image based on a distribution of the representative coefficient values.
    • 图像评估装置包括:部分区域提取部分,从原始图像提取多个部分区域; 提取图像生成部,其生成与各部分区域对应的提取图像,并具有其像素值对应于图像中的像素值的梯度的像素; 自相关计算部分,针对每个提取的图像计算多个自相关系数; 代表系数值计算部分,计算部分区域中的每个自相关系数的代表系数值; 以及检查部,其基于代表性系数值的分布来检查图像的质量。