Complementary single-pixel centroid detection system and method

Abstract

The invention discloses a complementary single-pixel centroid detection system and method. The system comprises a lens group, a single-pixel detector assembly, a light modulator DMD and an acquisition processing unit, and the acquisition processing unit generates a two-dimensional modulation matrix A and a two-dimensional modulation matrix B and loads the two-dimensional modulation matrix A and the two-dimensional modulation matrix B into the light modulator DMD; the lens group processes the light reflected or transmitted by the target object, so that the image of the target object is imaged on the light modulator DMD; the acquisition processing unit is connected with the data output ends of two single-pixel detectors and calculates the mass center of the target object. The light modulator DMD modulates the image signal of the target object according to the modulation information A and B; the single-pixel detector assembly comprises a first single-pixel detector and a second single-pixel detector which are used for respectively acquiring intensity values of reflected light in two complementary directions of the light modulator DMD. On the premise of not imaging, the mass center of the target object is directly detected, the complementary structure characteristic of the light modulator DMD is utilized, the quantity of modulation information is further reduced, and the mass center detection speed is increased.

Description

technical field [0001] The invention belongs to the technical field of computational imaging and centroid detection, and in particular relates to a complementary single-pixel centroid detection system and method. Background technique [0002] In the field of centroid detection, the traditional method is to first obtain the object image through the area array camera, and then calculate the centroid of the target object through the corresponding image processing algorithm. The quality of the captured object image determines the accuracy of the detection centroid. [0003] In the case of low signal-to-noise ratio, the quality of the image captured by the area array camera will be greatly affected, and some area array cameras in invisible bands (infrared, terahertz, etc.) are either expensive or cannot work effectively. The range of use of traditional methods for detecting centroids is limited. Single-pixel imaging technology Compared with traditional CCD (Charge Coupled Device...

AI Technical Summary

Problems solved by technology

[0005] A centroid detection method based on a single-pixel detector in the prior art (application number: 202010412816.0) uses three pieces of two-dimensional modulation information to directly target the centroid of the object without imaging, which is relatively slow

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