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    • 5. 发明授权
    • Arithmetic unit, correlation arithmetic unit and dynamic image compression apparatus
    • 算术单元,相关运算单元和动态图像压缩装置
    • US06272510B1
    • 2001-08-07
    • US09236225
    • 1999-01-25
    • Susumu KawakamiHiroaki OkamotoMotomu Takatsu
    • Susumu KawakamiHiroaki OkamotoMotomu Takatsu
    • G06F1715
    • G06F17/15
    • In a correlation arithmetic system adapted to detect a relative difference between two functions, an operation is simplified. This makes it possible to perform the operation with a small scale of hardware and also with great accuracy. There is adopted an operation g*h instead of the “product” in the correlation arithmetic operation. There is disclosed an arithmetic unit in which two numeral values a and b are inputted, and the two numerical values a and b are subjected to a predetermined operation process, so that a numerical value c representative of an operation result is derived. The arithmetic unit has an absolute value operation unit for evaluating an absolute value |c| of the numerical value c, and a sign operation unit for evaluating a sign “sign (c)” of the numerical value c.
    • 在适于检测两个功能之间的相对差异的相关运算系统中,简化了操作。 这使得可以以小规模的硬件并且以很高的精度执行操作。 在相关算术运算中采用运算g * h而不是“乘积”。 公开了一种运算单元,其中输入两个数字值a和b,并且对两个数值a和b进行预定的操作处理,从而导出代表运算结果的数值c。 算术单元具有用于评估绝对值| c |的绝对值运算单元 的数字值c的符号“sign(c)”的符号运算单元。
    • 6. 发明授权
    • Method and apparatus for extracting line segments from an image of an
object
    • 从对象的图像中提取线段的方法和装置
    • US5422962A
    • 1995-06-06
    • US32312
    • 1993-03-17
    • Yusuke YasukawaFumi HasegawaYasushi InamotoSusumu Kawakami
    • Yusuke YasukawaFumi HasegawaYasushi InamotoSusumu Kawakami
    • G06K9/46G06K9/32G06K9/36
    • G06K9/4647
    • A method of extracting a line segment contained in an original image includes the steps of clipping an image, which conforms to the size of a receptive field defining a small area, from the original image, projecting the clipped receptive-field image from a predetermined projection direction onto an axis (.rho. axis) that intersects the projection direction to obtain projection values at positions along the .rho. axis, subjecting the projection values to differentiation processing along the .rho. axis, similarly subjecting projection values, which are obtained by successively varying a projection-direction angle .theta. incrementally a predetermined amount, to differentiation processing along the .rho. axis to thereby obtain a differential value at each position on a .rho.-.theta. plane, and extracting a line segment contained in the receptive-field image based upon a peak position (.rho.,.theta.) of the differential values.
    • 提取包含在原始图像中的线段的方法包括以下步骤:从原始图像中剪切符合限定小区域的接收域的大小的图像,从预定投影中投影剪辑的接收场图像 方向到与投影方向相交的轴(rho轴),以在沿着rho轴的位置处获得投影值,对投影值进行沿着rho轴的微分处理,类似地,通过连续改变投影值, 方向角θ渐变为预定量,沿着rho轴进行微分处理,从而在rho-θ平面上的每个位置处获得差分值,并且基于峰位置(rho)提取包含在接受场图像中的线段 ,theta)的差分值。