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    • 5. 发明申请
    • A METHOD FOR PRODUCING A HISTOGRAM OF ORIENTED GRADIENTS
    • 一种生产面向梯度组合的方法
    • WO2016083002A1
    • 2016-06-02
    • PCT/EP2015/073058
    • 2015-10-06
    • FOTONATION LIMITED
    • MUNTEANU, Mihai ConstantinGEORGESCU, Vlad
    • G06K9/00G06K9/46
    • G06K9/4647G06K9/00986G06K9/4642G06K9/481G06K9/6267G06K2009/485G06T1/20
    • A method for producing a histogram of oriented gradients (HOG) for at least a portion of an image comprises dividing said image portion into cells, each cell comprising a plurality of image pixels. For each image pixel of a cell, a horizontal gradient component, gx, and a vertical gradient component, gy, is obtained based on differences in pixel values along at least a row of said image and a column of said image respectively including the pixel. A gradient is allocated to one of a plurality of sectors, each sector extending through a range of orientation angles. At least some of said sectors are divided from adjacent sectors along lines including gx=2 n .gy, where n is any integer value with a magnitude greater than or equal to 1. At least one sector is associated with a bin; and a count of each instance of a pixel gradient of a cell associated with a bin is performed to provide a HOG for said cell.
    • 用于为图像的至少一部分生成定向梯度(HOG)的直方图的方法包括将所述图像部分分成单元,每个单元包括多个图像像素。 基于单元的每个图像像素,基于沿着所述图像的至少一行和分别包括像素的所述图像的列的像素值的差异来获得水平梯度分量gx和垂直梯度分量gy。 梯度分配给多个扇区中的一个扇区,每个扇区延伸通过一定范围的取向角。 所述扇区中的至少一些沿着包括gx = 2n.gy的线的相邻扇区被划分,其中n是幅度大于或等于1的任何整数值。至少一个扇区与一个bin相关联; 并且执行与仓相关联的单元的像素梯度的每个实例的计数,以提供用于所述单元的HOG。