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    • 81. 发明授权
    • Method and apparatus for compressing the dynamic range of an image
    • 用于压缩图像的动态范围的方法和装置
    • US5881181A
    • 1999-03-09
    • US686723
    • 1996-07-26
    • Wataru Ito
    • Wataru Ito
    • H04N1/409G06T5/00G06T5/20G06T5/40
    • G06T5/10G06T5/008G06T2207/20016G06T2207/20021G06T2207/20064
    • An original image is transformed into a multi-resolution space and is thereby decomposed into images, each of which is of one of a plurality of different frequency bands. An image of the lowest frequency band, which is lowest among the plurality of the different frequency bands, is processed with the formulag.sub.L '=g.sub.L +f.sub.1 (g.sub.L)=f.sub.2 (g.sub.L)wherein f.sub.1 (g.sub.L) represents a function, the value of which decreases monotonically as the signal value g.sub.L of the image of the lowest frequency band increases. A processed image of the lowest frequency band is obtained from the processing. An inverse multi-resolution transform is then carried out on the processed image of the lowest frequency band and the images of the other frequency bands, and a processed image is thereby obtained.
    • 将原始图像变换成多分辨率空间,从而分解为多个不同频带之一的图像。 在多个不同频带中最低频带的图像用公式L'= gL + f1(gL)= f2(gL)进行处理,其中f1(gL)表示函数, 其随着最低频带的图像的信号值gL增加而单调减小。 从该处理获得最低频带的处理图像。 然后对最低频带的处理图像和其他频带的图像执行反多分辨率变换,从而获得处理后的图像。
    • 82. 发明授权
    • Digital image recording apparatus and method
    • 数字图像记录装置及方法
    • US5864787A
    • 1999-01-26
    • US823312
    • 1997-03-21
    • Wataru Ito
    • Wataru Ito
    • H04N1/393G06T3/40G06T5/10G06K9/32G06K9/36
    • G06T3/4084
    • In a digital image recording apparatus, an image processing is carried out on a first digital image signal obtained by sampling at a predetermined density an image signal representing an original image. The image processing is for increasing the amount of information carried by the first digital image signal and reducing frequency components of the first digital image signal which are higher than the Nyquist rate of the first digital image signal, thereby obtaining a second digital image signal. The second digital image signal is reproduced on a recording medium at a density higher than the predetermined density, thereby forming an image which is higher in resolution than that obtained from the first digital image signal and equal to that obtained from the first digital image signal in size.
    • 在数字图像记录装置中,对通过以预定浓度采样表示原始图像的图像信号获得的第一数字图像信号执行图像处理。 该图像处理用于增加由第一数字图像信号携带的信息量,并减小第一数字图像信号的频率分量,该频率分量高于第一数字图像信号的奈奎斯特率,从而获得第二数字图像信号。 第二数字图像信号以高于预定浓度的密度在记录介质上再现,从而形成分辨率高于从第一数字图像信号获得的分辨率的图像,并且等于从第一数字图像信号获得的图像 尺寸。
    • 83. 发明授权
    • Interpolating operation method and apparatus for image signals
    • 图像信号的插值操作方法和装置
    • US5832142A
    • 1998-11-03
    • US687963
    • 1996-07-29
    • Wataru Ito
    • Wataru Ito
    • G03B42/02G06T3/40H04N1/393G06K9/32G06K9/40
    • G06T3/4007
    • An original image signal, which represents an original image and is made up of a series of original image signal components Yij, is obtained. Corresponding interpolation coefficients Cij and Bij, which are set for each of the original image signal components Yij, in an interpolating function .alpha. represented by Formula (1) for obtaining an interpolation image having a relatively high sharpness and an interpolating function .beta. represented by Formula (2) for obtaining an interpolation image having a relatively low sharpness, are linearly combined each other according to Formula (3) including a weighting coefficient w, thereby obtaining a new interpolation coefficient Aij. An interpolating operation is carried out on the original image signal components Yij by using an interpolating function h represented by Formula (4), and an interpolation image signal made up of a series of image signal components which occur at intervals different from those of the original image signal components Yij is obtained. .alpha.=.SIGMA.Cij.multidot.Yij (1) .beta.=.SIGMA.Bij.multidot.Yij (2) Aij=(1-w).multidot.Cij+w.multidot.Bij (3) h=.SIGMA.Aij.multidot.Yij (4) A density vector at each interpolation picture element on the image is calculated, and the weighting coefficient w is corrected to be smaller as the density vector becomes larger.
    • 获得代表原始图像并由一系列原始图像信号分量Yij构成的原始图像信号。 对于由公式(1)表示的内插函数α中的每个原始图像信号分量Yij设置的相应插值系数Cij和Bij,用于获得具有较高锐度的内插图像和由公式( 2)用于获得具有相对较低锐度的插值图像,根据包括加权系数w的公式(3)彼此线性组合,从而获得新的插值系数Aij。 通过使用由公式(4)表示的内插函数h对原始图像信号分量Yij进行内插操作,以及由与原始图像信号分量不同的间隔发生的一系列图像信号分量组成的内插图像信号 得到图像信号分量Yij。 α= SIGMA CijxYij(1)beta = SIGMA BijxYij(2)Aij =(1-w)xCij + wxBij(3)h = SIGMA AijxYij(4)计算图像上每个插值像素处的密度矢量, 随着密度矢量变大,校正权重系数w变小。
    • 84. 发明授权
    • Method and apparatus for adjusting read-out conditions and/or image
processing conditions for radiation images , radiation image read-out
apparatus, and radiation image analyzing method and apparatus
    • 用于调整放射线图像的读出条件和/或图像处理条件的方法和装置,放射线图像读出装置和放射线图像分析方法和装置
    • US5828775A
    • 1998-10-27
    • US864451
    • 1997-05-28
    • Hideya TakeoWataru ItoKazuo Shimura
    • Hideya TakeoWataru ItoKazuo Shimura
    • G01T1/29G06T5/40G06K9/00G06K9/62
    • G01T1/2014G06T5/009G06T2207/10116G06T2207/20084
    • A first image signal representing a radiation image of an object is obtained by exposing a stimulable phosphor sheet, on which the radiation image has been stored, to stimulating rays, which cause the stimulable phosphor sheet to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, the emitted light being detected. A second image signal representing the radiation image is thereafter obtained by again exposing the stimulable phosphor sheet to stimulating rays, the light emitted by the stimulable phosphor sheet being detected. Read-out conditions, under which the second image signal is to be obtained, and/or image processing conditions, under which the second image signal having been obtained is to be image processed, are adjusted on the basis of the first image signal. A storage device stores information representing a standard pattern of radiation images. A signal transforming device transforms the first image signal representing the radiation image into a transformed image signal representing the radiation image, which has been transformed into the standard pattern. A condition adjuster is provided with a neural network, which receives the transformed image signal and feeds out information representing the read-out conditions and/or the image processing conditions.
    • 表示物体的放射线图像的第一图像信号是通过使已经存储有放射线图像的可刺激的荧光体片曝光来刺激光线,使得可激发的荧光体片材与存储的能量的量成比例地发光 在其暴露于辐射的同时,发射的光被检测。 然后,通过再次使可刺激的荧光体片曝光以刺激光线,获得表示放射线图像的第二图像信号,由可刺激的磷光体片发射的光被检测。 基于第一图像信号调整要获得第二图像信号的读出条件和/或已经获得的第二图像信号被图像处理的图像处理条件。 存储装置存储表示辐射图像的标准图案的信息。 信号变换装置将表示放射线图像的第一图像信号变换为已经变换为标准图案的表示放射线图像的变换后的图像信号。 条件调节器设置有神经网络,其接收变换后的图像信号并输出​​表示读出条件和/或图像处理条件的信息。
    • 85. 发明授权
    • Interpolating operation method and apparatus for image signals
    • 图像信号的插值操作方法和装置
    • US5737101A
    • 1998-04-07
    • US686030
    • 1996-07-25
    • Wataru Ito
    • Wataru Ito
    • G03B42/02G06T3/40H04N1/393H04N1/40H04N1/46H04N1/41
    • G06T3/403H04N1/40068
    • An interpolating operation is carried out on original image signal components which make up an original image signal representing an original image and represent values of original picture elements arranged in a grid pattern at predetermined intervals to obtain interpolation image signal components representing values of interpolation picture elements arranged in a grid pattern at intervals different from those of the original picture elements. Each interpolation image signal component is operated by multiplying the image signal components for a plurality of original picture elements adjacent to the interpolation picture element by respective interpolation coefficients calculated from the image signal components for the adjacent original picture elements. The density vector at the interpolation picture element on the original image represented is calculated, distances of the respective adjacent original picture elements from a segment perpendicular to the density vector are calculated, the interpolation coefficient is corrected to be smaller as the density vector and/or the distance of the original picture element from the segment becomes larger, and the interpolating operation is carried out on the basis of the corrected interpolation coefficient.
    • 对构成表示原始图像的原始图像信号的原始图像信号分量进行内插操作,并且以预定间隔表示以格子图案排列的原始图像元素的值,以获得表示布置的内插图像元素的值的插值图像信号分量 以与原始图像元素不同的间隔的网格图案。 每个内插图像信号分量通过将与内插图像元素相邻的多个原始图像元素的图像信号分量乘以由相邻原始图像元素的图像信号分量计算的各个内插系数来进行操作。 计算出所示原始图像上的插值像素处的密度矢量,计算相邻的原始图像元素与垂直于密度矢量的段的距离,将内插系数校正为较小的密度矢量和/或 原始图像元素与片段的距离变大,并且基于校正的插值系数执行内插操作。
    • 87. 发明授权
    • Method for obtaining information about interstitial patterns of the lungs
    • 获取有关肺的间质模式的信息的方法
    • US5513273A
    • 1996-04-30
    • US219431
    • 1994-03-17
    • Wataru Ito
    • Wataru Ito
    • G06T7/40G06T7/00
    • G06T7/402G06T2207/10116G06T2207/20064G06T2207/30061
    • For each picture element in a radiation image of the lungs, a basic Wavelet function is rotated on the radiation image, a degree of contraction of the basic Wavelet function is changed within a predetermined range, and Wavelet transformation is thereby carried out on the image signal, values of a Wavelet transformation factor being thereby calculated. For each value of the degree of contraction, a calculation is made to find a temporary representative value of the values of the Wavelet transformation factor, which have been obtained for each picture element when the degree of contraction was fixed at a predetermined value and the basic Wavelet function was thereby rotated on the radiation image. For each picture element, a representative value is determined from the temporary representative values, which have been calculated for the values of the degree of contraction. Interstitial patterns of the lungs are then rated in accordance with the representative value and the value of the degree of contraction, which was employed in the Wavelet transformation when the representative value was determined.
    • 对于肺的放射线图像中的每个像素,基本的小波函数在辐射图像上旋转,基本小波函数的收缩程度在预定范围内改变,从而对图像信号进行小波变换 由此计算小波变换因子的值。 对于收缩度的每个值,进行计算以找到当收缩程度固定在预定值时对于每个图像元素获得的小波变换因子的值的临时代表值,并且基本 因此,小波函数在辐射图像上旋转。 对于每个图像元素,根据已经针对收缩程度的值计算的临时代表值来确定代表值。 然后根据代表值和收缩程度的值来评估肺的间质模式,当确定代表值时,在小波变换中使用。
    • 88. 发明授权
    • Method and apparatus for performing various types of image processing in
one operation
    • 一种操作中执行各种图像处理的方法和装置
    • US5425113A
    • 1995-06-13
    • US992821
    • 1992-12-16
    • Wataru Ito
    • Wataru Ito
    • A61B6/00G06T1/00G06T5/00G06T5/20H04N1/407H04N7/18G06T5/50
    • G06T5/004G06T5/20
    • When a visible image is reproduced from an image signal Sorg representing an image, a value of an unsharp mask signal Sus corresponding to each picture element in the image is calculated by carrying out an operation expressed asSus=.SIGMA.Sorg/(M.times.N)on values of image signal components of the image signal Sorg, which image signal components represent the picture elements falling within an area having a size corresponding to M.times.N number of picture elements surrounding each of the picture elements in the image. A formula is employed which is expressed asS=.gamma.(K1.times.Sorg+.beta.(Sorg).times.(K2.times.Sorg-D (Sus) ))wherein .gamma. (x) represents a function with respect to an arbitrary value x, .beta. (Sorg) represents a function of an emphasis coefficient with respect to the image signal Sorg, D (Sus) represents an arbitrary function with respect to the unsharp mask signal Sus, and K1 and K2 represent fixed numbers. In the formula, the functions .beta. (x), .beta. (Sorg), and D (Sus), and the fixed numbers K1 and K2 are changed, and an operation for effecting image processing on the image signal Sorg is thereby carried out.
    • 当从表示图像的图像信号Sorg中再现可视图像时,通过执行表示为Sus = SIGMA Sorg /(MxN)的关于值的运算来计算与图像中的每个图像元素相对应的非锐化掩模信号Sus的值 的图像信号Sorg的图像信号分量,哪个图像信号分量表示落在具有对应于图像中每个图像元素的M×N个像素数的区域内的像素的像素。 使用表示为S = gamma(K1xSorg + beta(Sorg)x(K2xSorg-D(Sus)))的公式,其中gamma(x)表示相对于任意值x的函数,β(Sorg)表示函数 相对于图像信号Sorg的加重系数,D(Sus)表示相对于钝化掩模信号Sus的任意函数,K1和K2表示固定数。 在该公式中,改变函数β(x),β(Sorg)和D(Sus)以及固定数K1和K2,从而执行用于对图像信号Sorg进行图像处理的操作。
    • 89. 发明授权
    • Method for forming energy subtraction images
    • 形成能量减影图像的方法
    • US5402338A
    • 1995-03-28
    • US997533
    • 1992-12-28
    • Wataru Ito
    • Wataru Ito
    • G06T5/50G06F15/68G06F15/62
    • G06T5/004G06T5/50
    • Radiation images of an object constituted of tissues exhibiting different levels of radiation absorptivity are formed with two kinds of radiation having different energy levels. A first original image signal SO1 and a second original image signal SO2 representing the radiation images are detected. A superposition image signal is generated with a weighted addition expressed asS=(N2.sup.2 /(N1.sup.2 +N2.sup.2)).times.SO1+(N1.sup.2 /(N1.sup.2 +N2.sup.2)).times.SO2wherein N1 and N2 respectively represent noise contained in the first and second original image signals. A first image signal representing a first image primarily composed of patterns of first tissues of the object is generated by subtracting the first and second original image signals from each other. A first smoothed image signal representing a first smoothed image, in which noise of the first image has been reduced or eliminated, is generated by smoothing the first image signal. A second image signal representing a second image primarily composed of patterns of second tissues of the object is generated by subtracting the superposition image signal and the first smoothed image signal from each other.
    • 使用具有不同能级的两种辐射形成由表现出不同水平辐射吸收率的组织构成的物体的辐射图像。 检测表示放射线图像的第一原始图像信号SO1和第二原始图像信号SO2。 利用表示为S =(N22 /(N12 + N22))×SO1 +(N12 /(N12 + N22))×SO2的加权相加产生叠加图像信号,其中N1和N2分别表示包含在第一和第二原始图像信号 。 通过从彼此减去第一和第二原始图像信号来生成表示主要由对象的第一组织的图案组成的第一图像的第一图像信号。 通过平滑第一图像信号来生成表示第一图像的噪声已被减少或消除的第一平滑图像的第一平滑图像信号。 通过从叠加图像信号和第一平滑图像信号中减去第一图像信号,生成表示主要由对象的第二组织的图形组成的第二图像的第二图像信号。