Coding target and positioning and decoding method based on coding target

The invention provides a coding target and a positioning and decoding method based on the coding target, the coding target adopts an inner concentric circle and an outer concentric circle as positioning circles, and black and white coding points are arranged in an annular area between the concentric circles at equal angles and at equal positions. The center of the target is corrected and optimized through the inner and outer concentric positioning circles, higher positioning precision can be obtained, the area of a coding region can be reduced by using the annularly distributed coding points, and the decoding accuracy can be improved by calculating the similarity. 本发明提供一种编码靶标及基于编码靶标的定位与解码方法，该编码靶标采用内外两个同心圆作为定位圆，在同心圆之间的环形区域等角度分位布置黑白编码点。通过内外两个同心定位圆对靶标中心修正优化，可获得更高定位精度，通过使用环形分布的编码点可以减小编码区域面积，通过计算相似度可提高解码准确率。