Method and device for implementing linear high-definition scanning follow-up

Abstract

The invention discloses a method and a device for implementing linear high-definition scanning follow-up. The method comprises: determining a first central point position (x1, y1) of a high-definition scanning line, a scanning angle (a1), and first linear scanning laser fundus images; the high-definition scanning line scanning a fundus by the (x1, y1) and the scanning angle, to obtain a plurality of second linear scanning laser fundus images, matching the second linear scanning laser fundus images with the first linear scanning laser fundus images in a one-to-one manner, to obtain a plurality of groups of offset displacements, and counting a first displacement ([delta]xn, [delta]yn) from the offset displacements; performing registration on the first linear scanning laser fundus image and a third linear scanning laser fundus image, according to registration result, resetting the center point position of the high-definition scanning line; and the high-definition scanning line scanning the fundus, a computer collecting a plurality of funcus OCT images, so as to complete linear follow-up. The method and the device reduce hardware requirement on the computer. Under the condition that an OCT system cannot provide a hardware system which can change scanning positions in real time, in different time, the device and the method can realize accurate scanning on the same position of a human eye as well, and cost is saved.

Description

technical field [0001] The invention belongs to the field of ophthalmic OCT image processing, and in particular relates to a method and device for implementing linear high-definition scanning follow-up. Background technique [0002] At present, there are two ways to follow up the human fundus with OCT (Optical Coherence Tomography, optical coherence tomography): area scanning and eye movement tracking. For regional scanning, since the scanning range of the OCT scanning unit is relatively large, as long as the general direction of the fundus is scanned and then the scanning data is registered in the later stage, an accurate comparison of detection results at the same position can be obtained. However, the image effect of the area scan is usually not as good as that of the linear high-definition scan, so doctors prefer to use the follow-up method of the linear high-definition scan to grasp the changes in the shape of the fundus. [0003] For the follow-up of linear high-defin...

AI Technical Summary

Problems solved by technology

This method has high requirements on the hardware of the OCT system, mainly in real-time fundus image registration and real-time scanning orientation changes, which increases the difficulty of technical implementation

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