RU2812743C1 - Method for determining safe distance from mobile phone screen to user's eyes - Google Patents

Abstract

FIELD: computer technology.

SUBSTANCE: invention relates to the field of determining a safe distance from the screen of a mobile phone to the user’s eyes using a front digital camera built into the body on the screen side to preserve and prevent development of diseases of the human visual organs. The method makes it possible not to take into account the angle at which the phone is tilted relative to the user’s face, since at safe distances and different angles of inclination of the phone, the silhouette of the user’s face in the superimposed frames will either be completely hidden behind the rectangle sector, or will partially protrude from only one of the sides of the rectangle sector, which is sufficient evidence of a safe distance, and evidence of a reduction in the safe distance will be considered the moment the silhouette of the user’s face appears on the frames, enlarged to such an extent that parts of the face silhouette appear on both sides outside the rectangle sector, about which the program will issue an audio or visual notification.

EFFECT: reduction in the program's consumption of system resources of a mobile phone when determining a safe distance from the mobile phone screen to the user's eyes by superimposing a reference frame on the frames depicting the silhouette of the user's face received by the front camera of the phone, depending on the location of the silhouette of the user's face relative to the rectangle sector on superimposed frames.

1 cl, 5 dwg

Description

TECHNICAL FIELD

The invention relates to methods for determining a safe distance from the screen of a mobile phone to the user’s eyes using a front digital camera built into the body on the screen side and installed corresponding software for use in preventing the development of diseases of the human visual organs.

BACKGROUND OF THE ART

A mobile radiotelephone with additional functions is known from the prior art (Patent RU 2204887, N04M 1/02, N04M 1/21, published on May 20, 2003), containing, in addition to traditional components, sensors for pressure, temperature and humidity of the environment, as well as sensors defining parameters that characterize the user’s health state.

The device does not provide determination of a safe distance from the mobile phone screen to the user’s eyes.

The closest in technical essence and achieved effect to the proposed one is the technical solution (US2018278741 A1, 09/27/2018), which is a mobile phone with a front digital camera built into the body on the screen side and the corresponding software installed. The method is based on comparing the distance between the pupils or eyebrows of the user, obtained from a reference frame taken by the user himself when setting up the device, with a similar distance in subsequent frames received from the camera while the program is running, taking into account the angle of inclination of the mobile phone relative to the ground using the built-in tilt sensor in the phone.

A common feature of a similar and proposed solution is the determination of a safe distance from the mobile phone screen to the user’s eyes.

The disadvantage of a similar technical solution is the need to pre-set the device by the user in order to obtain a reference frame, which implies the use of a complex program algorithm based on measurements of the distances between the pupils or eyebrows of the user, taking into account simultaneous measurements of the parameters of the angle of inclination of the mobile phone relative to the ground using the built-in phone tilt sensor. At different angles of inclination of the mobile phone, the distances between the pupils and eyebrows of the user will differ from the distances on the reference frame, which, according to the author’s idea, should be compensated by processing data received from the tilt sensor of the mobile phone, and this significantly complicates the functionality of the program and requires significant consumption of the system resources of the mobile phone .

SUMMARY OF THE INVENTION

The technical objective of this invention is to eliminate the disadvantages inherent in the known technical solution.

The technical result of this invention is the creation of a universal method for determining the safe distance from the screen of a mobile phone to the user’s eyes, which is characterized in that after installing the appropriate software on a mobile phone with a front digital camera built into the body on the screen side, the user does not need to pre-configure the device, since the reference frame is a universal frame, which is a frame with a rectangular sector located along the entire length of the screen, from the top to the bottom edge, occupying 60% of the area in the center of the reference frame, which makes it possible to determine a safe distance by superimposing the above-mentioned reference frame on frames from the image silhouettes of the user's face, obtained during the active operation of the program, where, depending on the location of the silhouette of the user's face relative to the rectangle sector on the superimposed frames, the software will make a decision on a safe, more than 40 cm, or dangerous distance. The method makes it possible to completely ignore the angle at which the phone is tilted relative to the user’s face, since at safe distances and different angles of inclination of the phone, the silhouette of the user’s face in the superimposed frames will either be completely hidden behind the rectangle sector or will partially protrude only from one side of the rectangle sector, which is sufficient evidence of a safe distance, and evidence of a reduction in the safe distance will be considered the moment the silhouette of the user’s face appears on the frames, enlarged to such an extent that parts of the face silhouette appear on both sides outside the rectangle sector, about which the program will issue an audio or visual notification and Accordingly, this method provides a much simpler program algorithm that does not require the use of data from the phone’s tilt sensor relative to the ground and constant measurements of the distances between the pupils or eyebrows of the user, which significantly reduces the program’s consumption of system resources of the mobile phone and does not slow down the operation of other applications.

The essence of the invention is illustrated by drawings, where in Fig. 1 is an illustration of the camera's autofocus pattern on the silhouette of the user's face;

in fig. 2 is an illustration of a diagram of a reference frame with a rectangular sector occupying 60% of the area in the center of the frame; in fig. 3-illustration of a scheme for superimposing a reference frame on frames of the silhouette of the user’s face obtained as a result of active operation of the program at safe distances;

in fig. 4 is an illustration of a scheme for superimposing a reference frame on frames of the user’s face silhouette obtained as a result of active program operation at various angles of inclination of the mobile phone and at safe distances;

in fig. 5 is an illustration of a scheme for superimposing a reference frame on frames of the user’s face silhouette obtained as a result of active program operation at different angles of inclination of the mobile phone and when the safe distance is reduced.

The device works as follows.

As a result of the active operation of the program, the camera constantly autofocuses on the silhouette of the user's face, as on the closest object (Fig. 1), followed by periodic photographic recording of the user's image. The resulting images are superimposed by the program on a universal reference frame with a rectangular sector (Fig. 2).

The silhouette of the user’s face in the frames will either be completely hidden behind the rectangle sector (Fig. 3) or will partially protrude from one of the sides of the rectangle sector (Fig. 4), which is not evidence of a reduction in the safe distance and only when the silhouette of the user’s face appears in the frames enlarged to such an extent that parts of the silhouette will already appear on both sides outside the rectangle sector (Fig. 5), which will indicate a reduction in the safe distance and about which the program will issue an audio or visual notification.

This invention can be implemented using software installed on a standard mobile phone with a front digital camera built into the body on the screen side.

Claims (1)

A method for determining the safe distance from the screen of a mobile phone to the user’s eyes using a front digital camera built into the body on the screen side and installed corresponding software, characterized in that after installing the corresponding software on a mobile phone with a front digital camera built into the body on the screen side the user does not need to pre-configure the device, since the reference frame is a universal frame, which is a frame with a rectangular sector located along the entire length of the screen, from the top to the bottom edge, occupying 60% of the area in the center of the reference frame, which makes it possible to determine the safe distance by overlay the above-mentioned reference frame into frames depicting the silhouette of the user’s face, obtained during the active operation of the program, where, depending on the location of the silhouette of the user’s face relative to the rectangle sector on the superimposed frames, the software will make a decision on a safe, more than 40 cm, or dangerous distance, which allows you to completely ignore the angle at which the phone is tilted relative to the user’s face, since at safe distances and different angles of inclination of the phone, the silhouette of the user’s face in the overlaid frames will either be completely hidden behind the rectangle sector, or will partially protrude from only one side of the rectangle sector , which is sufficient evidence of a safe distance, and evidence of a reduction in the safe distance will be considered the moment the silhouette of the user’s face appears on the frames, enlarged to such an extent that parts of the face silhouette appear on both sides outside the rectangle sector, about which the program will issue an audio or visual notification , and, accordingly, this method provides a much simpler algorithm for the program, which does not require the use of data from the phone’s tilt sensor relative to the ground and constant measurements of the distances between the pupils or eyebrows of the user, which significantly reduces the program’s consumption of system resources of the mobile phone and does not slow down the work of others applications.