Throat swab acquisition method based on image identification and positioning

Abstract

The invention provides a throat swab acquisition method based on image identification and positioning. The method comprises the following steps: S1, shooting at an acquisition far end to obtain a far end acquisition image, identifying a circular contour of a mouthpiece in the far end acquisition image, and obtaining pixel coordinates of a circle center of the mouthpiece; S2, correcting a position of a throat swab acquisition mechanism, enabling the circle center pixel coordinates of the mouthpiece to coincide with pre-calibrated circle center pixel standard coordinates of the mouthpiece, and carrying out coarse positioning; S3, shooting at an acquisition near end to obtain a near-end acquisition image, and identifying uvula center pixel coordinates in the near-end acquisition image; and S4, calculating pixel coordinates of a replacement point of the acquisition area according to the uvula center pixel coordinates, and correcting the position of the throat swab acquisition mechanism, enabling pre-calibrated light spot circle center pixel coordinates to coincide with the pixel coordinates of the replacement point, and carrying out accurate positioning. The identification and positioning precision of the acquisition area is improved through two-step positioning, and the throat swab acquisition mechanism can be accurately guided to move to the position of the acquisition area.

Description

technical field [0001] The invention relates to the technical field of throat swab sampling, in particular to a throat swab collection method based on image recognition and positioning. Background technique [0002] The substance for nucleic acid detection is the nucleic acid of the virus. Nucleic acid detection is to find out whether there is nucleic acid of foreign invading virus in the patient's respiratory specimen, blood or feces to determine whether he is infected by the new coronavirus. Therefore, once the test is "positive" for nucleic acid, it can prove that there is a virus in the patient's body. [0003] At present, the most commonly used nucleic acid detection method is artificial throat swab detection, which requires medical staff to hold the throat swab and insert it into the mouth of the nucleic acid tester, and wipe the pharynx, tonsils, palatal arch and other parts to collect secretions from these parts. This detection method puts medical staff at the risk...

AI Technical Summary

Problems solved by technology

[0004] The automatic collection of the throat swab collection mechanism needs to identify and locate the collection area in the mouth of the nucleic acid tester to guide the throat swab collection mechanism to move to the collection area for sampling, and the accuracy of the identification and positioning method of the collection area in the prior art is relatively low Poor, unable to guide the throat swab collection mechanism to accurately move to the location of the collection area

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