Application of area-of-interest positioning method to instrument monitoring identification

The invention relates to an application of an area-of-interest positioning method to instrument monitoring identification. The application comprises the steps that (A) two-dimension codes are attached; (B) a camera is initialized; (C) an image is captured; (D) motion detection is conducted; (E) image format conversion is conducted; (F) Markers are detected, and an ROI is positioned; (G) the ROI is partitioned; (H) read number is identified; (I) the read number is displayed; (J) an audible alarm is given. The Markers only have a black color and a white color and are quite obvious after image binaryzation so that the ROI can be quickly and accurately positioned, the image preprocessing operation is simplified, and the Markers can adapt to illumination changing conditions and are high in robustness. The motion detection method is used for detecting jittering of an instrument, positioning is conducted on characters only when the instrument jitters, and the problems that instrument jitters or instrument features are not obvious and the ROI is difficult to position in the instrument monitoring identification process are solved.