公开(公告)号：US20020097904A1

公开(公告)日：2002-07-25

申请号：US10033159

申请日：2001-10-26

Applicant: ELECTROGLAS, INC.

Inventor： Raymond G. White

IPC: G06K009/00

CPC classification number: G06K9/3275 ,  G06T7/74 ,  G06T2207/30148

Abstract: A system is disclosed for determining the rotational orientation of an object. An image of the object is digitally captured. The digital image is filtered through an edge detection operation to enhance the edge information contained in the image. The filtered image is rotated through a series of incremental angles to produce a series of rotated images. Each rotated image is projected onto an x-axis and y-axis defined by pixel grid axes defined by the original image. The projection of the rotated images produces projected pixel counts formed by the summation of pixel value differences of the x-axis and y-axis on the projected image. For each rotated image, a score corresponding to the sum of the difference of gray-scale values for adjacent projected pixels is computed. The scores for the projections of each rotated image are plotted on a score-angle graph. A curve which includes the highest score and the neighboring next highest scores is interpolated to determine the peak score. The peak score corresponds to the scene angle of the object relative to the x-axis and y-axis defined by the original image.

Abstract translation: 公开了一种用于确定物体的旋转取向的系统。 数字捕获对象的图像。 通过边缘检测操作对数字图像进行滤波，以增强包含在图像中的边缘信息。 滤波图像通过一系列增量角度旋转以产生一系列旋转图像。 每个旋转的图像投影到由原始图像定义的像素网格轴定义的x轴和y轴上。 旋转的图像的投影产生由投影图像上的x轴和y轴的像素值差的总和形成的投影像素计数。 对于每个旋转的图像，计算与相邻投影像素的灰度值的差的和相对应的分数。 每个旋转图像的投影的分数绘制在得分角度图上。 插入包括最高分数和相邻的下一个最高分数的曲线以确定峰值分数。 峰值分数对应于物体相对于由原始图像限定的x轴和y轴的场景角度。