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    • 22. 发明授权
    • Binarizing method and apparatus therefor
    • 二次化方法及其装置
    • US5400415A
    • 1995-03-21
    • US873212
    • 1992-04-24
    • Akira Kobayashi
    • Akira Kobayashi
    • G06T1/00G06K9/38G06T5/00
    • G06T7/0081G06K9/38G06T2207/10016
    • A binarizing method for converting an image picked up by a television camera into a binary image based on a binarization level used as a threshold, includes a first step of finding a maximum value and a minimum value of a density of the image picked up, a second step of creating a histogram of the density of the image and dividing the histogram into a first region and a second region based on the maximum and minimum values of the density of the image and a predetermined first division ratio, a third step of calculating an average density of each of the first region and the second region, a fourth step of deciding a binarization level based on the average density of each of the first and second regions and a second division ratio, a fifth step of binarizing the image based on the binarization level obtained in the fourth step, a sixth step of detecting a pattern by means of a binarized image obtained in the fifth step, and a seventh step of altering the binarization level by a predetermined degree and performing the fifth and sixth steps if the pattern is not correctly detected at the sixth step and storing the binarization level in order to set the second division ratio in the fourth step based on the binarization level if the pattern is correctly detected at the sixth step. The apparatus therefor is constructed to carry out the method.
    • 一种用于基于用作阈值的二值化级别将由电视摄像机拾取的图像转换为二进制图像的二值化方法包括:找到拾取的图像的密度的最大值和最小值的第一步骤, 基于所述图像的浓度和预定的第一分割比的最大值和最小值,创建所述图像的浓度的直方图并将所述直方图划分为第一区域和第二区域的第二步骤;计算第 第一区域和第二区域中的每一个的平均密度;第四步骤,基于第一区域和第二区域中的每个区域的平均密度来确定二值化水平,以及第二分割比率;第五步骤,基于 在第四步骤中获得的二进制级别,第五步骤,通过在第五步骤中获得的二值化图像检测图案;以及第七步骤,通过预定义来改变二值化水平 并且如果在第六步骤中没有正确地检测到图案并且存储二值化等级以便在第四步中基于二值化水平设置第二分频比,则在第五和第六步骤执行第五和第六步骤,如果在 第六步。 构造该装置来执行该方法。
    • 27. 发明授权
    • Light source device
    • 光源装置
    • US4909604A
    • 1990-03-20
    • US235097
    • 1988-08-23
    • Akira KobayashiTooru Sano
    • Akira KobayashiTooru Sano
    • G02F1/133F21V7/00F21V8/00G02F1/1335G02F1/13357G09F13/18
    • G02B6/0046F21V7/00G02B6/005G02B6/0068G02B6/0071G02B6/0083G09F2013/1804
    • A light source device has a transparent plate having a smoothened front surface and a roughened rear surface. A light source is disposed adjacent to an end face of the transparent plate. The roughened rear surface has a portion which is inclined and curved and disposed adjacent to the end of the transparent plate remote from the light source. A reflecting plate is disposed adjacent to and extends along the roughened rear surface of the transparent plate. The provision of the inclined and curved surface portion assures that the luminance of the light on the smoothened front surface of the transparent plate is substantially uniform over the entire surface area. The inclined and curved surface portion is represented by the following equation,y=H--(H-h)x.sup.n /L.sup.nwherey is a distance from the smoothened front surface,x is a distance from the light source,L is a length of the transparent plate,H is the value of y at the end face of the transparent plate,h is the value of y at x being L, andn is an arbitrary positive number larger than unity, andwherein the height of the light source is substantially the same as H.
    • 光源装置具有透光板,其具有光滑的前表面和粗糙的后表面。 光源与透明板的端面相邻设置。 粗糙的后表面具有倾斜和弯曲的部分,并且与远离光源的透明板的端部相邻设置。 反射板与透明板的粗糙后表面相邻并且延伸。 提供倾斜和弯曲表面部分确保透明板的平滑前表面上的光的亮度在整个表面区域上基本均匀。 倾斜和弯曲的表面部分由下式表示:y = H-(Hh)xn / Ln其中y是距平滑前表面的距离,x是距离光源的距离,L是透明的长度 H是透明板的端面处的y的值,h是x处的y的值为L,n是大于1的任意正数,并且其中光源的高度基本上是 与H.