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    • 1. 发明授权
    • Printing device, image data file processing device, method of selecting image data file, and computer program product
    • 打印装置,图像数据文件处理装置,图像数据文件的选择方法以及计算机程序产品
    • US08150190B2
    • 2012-04-03
    • US11821033
    • 2007-06-20
    • Ayahiro NakajimaKenji FukasawaKenji Matsuzaka
    • Ayahiro NakajimaKenji FukasawaKenji Matsuzaka
    • G06K9/40
    • H04N19/48
    • With a minimal process load, to determine level of the image of an image data file, for image data files of a format that saves images in the form of coefficients of discrete frequency components. Image data that includes a plurality of coefficients representing the pattern of change of color of the image are acquired (Step S10). Multiple sets of basic pattern data that respectively include a plurality of basic coefficients representing basic patterns of color change are prepared. Then, based on a comparison of the two, one set of selected basic pattern data is selected from among the multiple sets of basic pattern data (Step S20). Subsequently, the blur level of the image of the image data is calculated, based on the basic blur level associated with the selected basic pattern data (S30-S70).
    • 以最小的过程负载,确定图像数据文件的图像的级别,用于以以离散频率分量的系数的形式保存图像的格式的图像数据文件。 获取包含表示图像的颜色变化图案的多个系数的图像数据(步骤S10)。 准备分别包括表示颜色变化的基本图案的多个基本系数的多组基本图案数据。 然后,基于两者的比较,从多组基本模式数据中选择一组选择的基本模式数据(步骤S20)。 随后,基于与所选择的基本图案数据相关联的基本模糊级别来计算图像数据的图像的模糊级别(S30-S70)。
    • 3. 发明授权
    • Image blur detection using cumulative blur widths
    • 使用累积模糊宽度的图像模糊检测
    • US07920756B2
    • 2011-04-05
    • US11825094
    • 2007-07-02
    • Takashige TanakaAyahiro Nakajima
    • Takashige TanakaAyahiro Nakajima
    • G06K9/48G06K9/36G06K9/40G06K9/46
    • G06K9/4609G06K9/4638H04N1/58H04N1/646
    • A printer fetches a horizontal direction DCT coefficient group and a vertical direction DCT coefficient group for each block from the JPEG data. The printer selects edge patterns similar to the brightness changes expressed by these coefficient groups from a specified table, and records those pattern numbers in a RAM. The printer judges whether or not the brightness changes of the blocks with each other adjacent are continuous based on the pattern number of each block recorded in the RAM. And by connecting the edge patterns when those brightness changes are continuous, the printer accumulates the blur widths that exist extending over the blocks. Then, based on this cumulative value, the printer determines the presence or absence of image blur. It is possible thereby to detect with good precision the blur of images even for high resolution images while reducing the used memory capacity.
    • 打印机从JPEG数据中取出每个块的水平方向DCT系数组和垂直方向DCT系数组。 打印机从指定的表中选择与这些系数组所表示的亮度变化类似的边缘图案,并将这些图案号记录在RAM中。 打印机基于记录在RAM中的每个块的图案号来判断彼此相邻的块的亮度变化是否连续。 并且通过连接边缘图案,当这些亮度变化是连续的时,打印机会累积存在于块上的模糊宽度。 然后,基于该累计值,打印机确定图像模糊的存在或不存在。 因此,即使对于高分辨率图像也可以精确地检测图像的模糊,同时减少了所使用的存储器容量。
    • 10. 发明申请
    • Blurring determination device, blurring determination method and printing apparatus
    • 模糊确定装置,模糊确定方法和打印装置
    • US20080137982A1
    • 2008-06-12
    • US11999425
    • 2007-12-04
    • Ayahiro Nakajima
    • Ayahiro Nakajima
    • G06K9/40
    • G06T7/42
    • The blurring determination device references image data in which are recorded coefficients that are obtained when pixel values forming the image in the spatial domain are converted to the frequency domain, and detects edges oriented in two or more directions, from among the image data, by comparing a series of the coefficients in each of the directions with various types of basic edge patterns whereby typical gradient patterns of the changes in pixel values are represented by values corresponding the coefficients. The representative values of the width of the detected edges is determined in each of the directions, and the image data is determined to not be blurred when the representative values meet the condition of being at or below a certain threshold.
    • 模糊判定装置参照图像数据,其中,将形成空间域中的图像的像素值转换为频域时获得的记录系数,并且通过比较来检测来自图像数据的两个或更多个方向的边缘 通过各种基本边缘图案的每个方向的一系列系数,由此像素值变化的典型梯度图案由对应于系数的值表示。 在每个方向上确定检测到的边缘的宽度的代表值,并且当代表值满足等于或低于某一阈值的条件时,图像数据被确定为不模糊。