Methods and systems for detecting screen covers on electronic devices

A method for detecting a presence or absence of a screen cover on an electronic device, the method comprising:

• receiving an image of a front side of an electronic device, the electronic device having a screen and a non-screen periphery at the front side, the non-screen periphery having four corner portions;
• automatically identifying line segments in the image using machine vision;
• determining respective positions of the identified line segments within the image;
• determining a first amount of the identified line segments having respective positions within portions of the image corresponding to the corner portions of the non-screen periphery;
• determining a second amount of the identified line segments having respective positions not within the portions of the image corresponding to the corner portions of the non-screen periphery;
• and
• determining a presence or absence of a screen cover on the electronic device based at least in part on the first amount relative to the second amount.

A computer-readable memory carrying non-transitory computer-executable instructions for causing one or more processors to facilitate detecting the presence or absence of a screen cover on an electronic device, the computer-executable instructions comprising instructions that, when executed by the one or more processors:

• receive an image of a front side of an electronic device, the electronic device having a screen and a non-screen periphery at the front side;
• automatically identify line segments in a portion of the image corresponding to the non-screen periphery of the electronic device using machine vision;
• determine respective angles of the identified line segments;
• determine a first amount of the identified line segments having respective angles within a first predetermined range about a vertical angle;
• determine a second amount of the identified line segments having respective angles within a second predetermined range about a horizontal angle;
• and
• determine the presence or absence of a screen cover on the electronic device based at least in part on the first amount, the second amount, or both.

A method for detecting a presence or absence of a screen cover on an electronic device, the method comprising:

• receiving an image of a front side of an electronic device;
• screening segments of the image for indicia of bubbles;
• identifying a number of segments of the image in which indicia of bubbles are present;
• and
• determining a presence or absence of a screen cover on the electronic device based at least in part on the number of segments of the image in which indicia of bubbles are present.