US 11,940,348 B1
System and method for detecting centroid of complementary single pixel
Dongfeng Shi, Hefei (CN); Yingjian Wang, Hefei (CN); Jian Huang, Hefei (CN); Yafeng Chen, Hefei (CN); Ke'e Yuan, Hefei (CN); and Linbin Cha, Hefei (CN)
Assigned to Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei (CN)
Filed by Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei (CN)
Filed on Nov. 22, 2023, as Appl. No. 18/517,487.
Application 18/517,487 is a continuation of application No. PCT/CN2022/070605, filed on Jan. 7, 2022.
Claims priority of application No. 202111046776.3 (CN), filed on Sep. 6, 2021.
Int. Cl. G01M 11/00 (2006.01)
CPC G01M 11/00 (2013.01) 4 Claims
OG exemplary drawing
 
1. A method for detecting a centroid of a complementary single pixel, comprising the following steps of:
generating, by a computer in an acquisition and processing unit, a two-dimensional modulation matrix A and a two-dimensional modulation matrix B, which are represented by two-dimensional functions, respectively;
wherein an abscissa direction and an ordinate direction of a coordinate system where the two-dimensional functions are located correspond to a row direction and a column direction of the two-dimensional modulation matrix in respective, a two-dimensional function value corresponds to an element value of the two-dimensional modulation matrix, and the two-dimensional functions that correspond to the two-dimensional modulation matrix A and the two-dimensional modulation matrix B meet the following relational expressions in respective:
S1(x,y)=x  (1)
S2(x,y)=y  (2)
in the formula, Sn(x, y)(n=1, 2) represents an element value corresponding to a coordinate (x, y) in the two-dimensional modulation matrix;
loading the generated modulation information into the DMD, to modulate an image of a target object;
acquiring, by a data acquisition unit, intensity values of reflected light in two complementary directions of the DMD by using a first single-pixel detector and a second single-pixel detector; and
solving the centroid according to a centroid solving algorithm.