Method and apparatus for eye and eyewear characteristics measurement

摘要

A method and apparatus for contactless measurement of the characteristics of patients' eyes and eyewear without using any reference device for scaling measurements. The non-contact system comprises of a measurement device having an array of proximity sensors for contactless distance measurement, which is embracing a mobile device having a digital camera, a processor, gyroscope or 3-axis accelerometer sensors, and wireless transceivers. The wireless transceivers support fast and real-time communication between the mobile device and the measurement device. The mobile device is configured to obtain information of distance between the patient face the measurement device at the same time as the digital camera is capturing images of the patient. Such distances assist the processor of the mobile device to re-construct actual eye and eyewear characteristics from the captured image of the digital camera. The built-in gyroscope sensors may be used to correct errors caused by inadequate orientation of the patient's face and/or the mobile device. The method thus enables fast, accurate and reference less measurement, and reduces the responsibilities of users.

主权项

1. An apparatus and method for contactless measurement of, one or more, eye and eyewear characteristics, without one or more known reference dimensions for scaling measurements, comprising:
a mobile device itself comprising a digital camera, a wireless transceiver, an accelerometer sensor and a gyroscope sensor; a measurement device consisting array of distance reporting proximity sensors, a microcontroller, a power supply and a Bluetooth low-energy transceiver to communicate with said wireless transceiver of said mobile device; said measurement device configured to receive control signals from said mobile device when its camera being activated and send information of measured distance to said mobile device for calculation of eye characteristics; software running on the said measurement device that measures and responds to queries from the said mobile device; method of running a software on the said mobile device such that it provides a user interface and co-ordinates:
user interaction with measurement setup;providing live and dynamic guiding lines, advice text and capture points positioning and measurement out of range conditions on said user interface to ensure capture of patient face and frame image correctly;capturing patient face and frame image from front side;capturing a second patient face and frame image from the side;capturing an optional third image of the frame placed on a flat surface;acquiring said distance measurements from the said measurement device wirelessly;calculating said characteristics from said distance measurements and distances and angles in the images captured by the said mobile device;application of scaling;application of error corrections to said measurements based on said accelerometer and gyroscopes data;presentation of said measurement results on user interface;providing ability to manually adjust measurement lines and angles determined and drawn on user interface by the said mobile device;and uploading of said measurement results to a remote server or computer.