An aging-friendly reading method and system based on visual tracking technology

Abstract

The present invention provides an aging-friendly reading method and system based on visual tracking technology, which relates to the field of aging-friendly sitting reading technology. It includes: an eye tracking module, a sitting posture monitoring module, an interface zoom module, an anti-misoperation module and a health management module. The eye tracking module captures the user's eye movement data in real time through an eye tracker and calculates the coordinates of the eye focus area; the sitting posture monitoring module measures the angle between the elderly reader's back and legs and the distance between the head and the screen; the interface zoom module can associate the magnification ratio of the eye focus area with the elderly reader's position data to optimize the visual compensation effect. The invention associates the magnification ratio of the eye focus area with the elderly reader's position data in real time through a dynamic linkage mechanism, supports multi-scene adaptation, and aims to solve the problems of the existing technology of single interface magnification function and separation of health monitoring and operation scenes.

Description

Technical Field

[0001] The present invention relates to the field of aging-friendly reading technology, and in particular to an aging-friendly reading method and system based on visual tracking technology. Background Art

[0002] As the global aging population accelerates and the proportion of people aged 65 and over continues to rise, the elderly population's dependence on digital devices has significantly increased. From online medical consultations and financial transactions to social communication, digital services have become an integral part of daily life. However, vision impairment (such as presbyopia and macular degeneration) can lead to blurred text and difficulty identifying buttons, while bone health issues (such as cervical spondylosis and lumbar strain) are exacerbated by prolonged sitting. These obstacles severely limit the efficient use of electronic devices by the elderly.

[0003] Although existing technologies provide basic magnification functions or simple health reminder functions, they generally have problems of functional fragmentation and insufficient adaptability. For example, traditional interface magnification cannot dynamically match the focus of vision, or existing technologies are not combined with sitting posture correction. Health monitoring equipment lacks linkage with operating scenarios and cannot adapt to elderly people with different degrees of vision loss. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems mentioned in the above background technology and provide an aging-friendly reading method and system based on visual tracking technology to solve the problems of functional fragmentation and insufficient adaptability of existing aging-friendly electronic products.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides an aging-friendly reading method based on visual tracking technology, the method comprising the following contents:

[0007] An eye tracker device is placed opposite the elderly reader to capture the elderly reader's eye movement data in real time and calculate the coordinates of the gaze focus area on the user interface;

[0008] The spatial coordinates of the elderly reader's legs, back, and head are obtained through the camera, and the distance Y between the head and the user interface is calculated in real time. n , the angle between the back and the legs θ;

[0009] Set the abnormal monitoring time, sitting posture threshold Y0 and the upper and lower limits of θ when the sitting posture is correct, and monitor Y nWhether the or / and θ values ​​change, and record the change time. If the change time reaches the abnormal monitoring time, the user interface pops up a dialog box to ask whether to adjust the interface magnification ratio. If the elderly reader's eye movement chooses to keep the current magnification ratio unchanged, continue reading. If the elderly reader's eye movement chooses to execute interface zoom, then the set sitting posture threshold Y0 and the current Y n Whether the difference between θ and the current θ exceeds the upper and lower limits, it is determined whether the elderly reader is leaning forward or backward, and the magnification ratio of the sight focus area in the user interface is automatically adjusted to meet the reading needs of the elderly reader;

[0010] Set the reading maintenance judgment time and sedentary time threshold. When the elderly reader maintains the current sitting posture and reads for a time that reaches the reading maintenance judgment time, the magnification ratio of the visual focus area at this time is locked, and the sedentary timer counts. When the sedentary time threshold is exceeded, a reminder is issued; if the elderly reader's reading time does not reach the reading maintenance judgment time, the elderly reader's sitting posture is continuously monitored to see if it is normal. When an abnormality is detected and the abnormality monitoring time is reached, the magnification ratio of the visual focus area of ​​the interface is adjusted.

[0011] Furthermore, the abnormality monitoring time is set to 30 seconds, the reading maintenance judgment time is set to 1 minute, and the sedentary time threshold is set to 30 minutes; the upper and lower limits of θ are set to 100° and 90° respectively.

[0012] In a second aspect, the present invention provides an aging-friendly reading system based on visual tracking technology, which is applied to an electronic device equipped with a user interface, and wherein elderly readers can read while sitting. The system comprises:

[0013] An eye tracking module, wherein the eye tracking module places an eye tracker device opposite the elderly reader to capture the elderly reader's eye movement data in real time and calculate the coordinates of the eye focus area on the user interface;

[0014] The sitting posture monitoring module is configured to obtain the spatial coordinates of the elderly reader's legs, back and head when sitting through the camera, and calculate the angle θ between the back and legs and the distance Y between the head and the user interface in real time. n , set the sitting threshold Y0, according to Y0 and Y n Whether the absolute value of the relative error is less than 5% selects the operation maintenance mode or the adjustment mode;

[0015] The interface zoom module is configured to combine the coordinates of the sight focus area calculated by the sight tracking module with the Y coordinates calculated by the sitting posture monitoring module. nReal-time association sets the upper and lower limits of θ for correct sitting posture. In adjustment mode, when the distance between the elderly reader's head and the user interface deviates from the sitting posture threshold Y0, or / and θ exceeds the upper and lower limits, the magnification ratio of the visual focus area in the user interface is automatically adjusted to meet the elderly reader's reading needs;

[0016] An anti-misoperation module configured to automatically lock the magnification ratio of the sight focus area in the user interface and only readjust the magnification ratio of the sight focus area when the elderly reader makes an eye movement to select to zoom in and out of the interface;

[0017] The health management module is configured to activate the sedentary timer and set a sedentary time threshold when the sitting posture monitoring module determines that the elderly reader is in maintenance mode. When the elderly reader's inactivity time exceeds the set sedentary time threshold, forced intervention is performed and the user interface is locked.

[0018] As a further improvement of the present invention, the sitting posture monitoring module pre-determines the sitting posture threshold value Y0 of the elderly reader, that is, the reference distance between the head and the user interface. The system monitors the sitting posture of the elderly reader in real time through the camera and calculates Y n , and according to Y0 and Y n The absolute values ​​of the relative error values ​​run different adjustment modes.

[0019] As a further improvement of the present invention, the adjustment mode is as follows: if Y0 and Y n The absolute value of the relative error is not less than 5%, then Y0 and Y n The difference between Y0 and Y n If the absolute value of the relative error is less than 5%, the magnification ratio of the sight focus area is maintained and the maintenance mode is entered.

[0020] As a further improvement of the present invention, the reference distance is measured by measuring the distance between the elderly reader's head and the user interface when the elderly reader is in a comfortable and healthy reading posture, that is, when Y0 is the angle between the back and legs is between 90°-100°.

[0021] As a further improvement of the present invention, the interface zoom module sets the magnification ratio of the sight focus area in the user interface to the default ratio (100%) before running, and receives the Y0 and Y0 transmitted by the sitting posture monitoring module during running. n The difference is calculated and different magnification adjustment strategies are performed according to the positive or negative value of the difference.

[0022] As a further improvement of the present invention, the amplification ratio adjustment strategy is as follows: n) is less than 0, the magnification ratio of the sight focus area will be reduced by 5%. n ) is greater than 0, the magnification ratio of the sight focus area will be increased by 10%. If after adjusting the magnification ratio of the sight focus area, the elderly reader maintains the current sitting posture and reads for one minute, the magnification ratio of the current sight focus area will be locked and the anti-misoperation module will be entered.

[0023] As a further improvement of the present invention, the anti-misoperation module can modify the magnification ratio of the visual focus area according to different strategies after the elderly reader's sitting posture changes. The strategy is: when it is detected that the elderly reader's sitting posture in the maintenance mode is in an abnormal state, the user interface prompts whether the interface magnification ratio needs to be adjusted. If the visual focus area needs to be adjusted, the eyes slowly scan across the user interface, and the interface zoom module is executed at this time. If the magnification ratio of the visual focus area does not need to be adjusted, the eyes look to the outside of the user interface to cancel the above prompt.

[0024] As a further improvement of the present invention, the abnormal state is that the angle between the back and legs of the elderly reader is lower than 90° or higher than 100°, and the current posture is maintained for more than 30 seconds.

[0025] As a further improvement of the present invention, the health management module is divided into a family reading mode and a public reading mode according to different reading scenarios of elderly readers.

[0026] As a further improvement of the present invention, the family reading mode sets the sedentary time threshold to 30 minutes. After exceeding the limit, the user interface is forcibly locked. The reading data such as reading time and frequency of elderly readers are counted and a health report is generated, which is sent to the guardian or community hospital in the form of charts, etc. The public reading mode only supports the sedentary reminder function and does not set functions such as health report generation.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention dynamically links the magnification ratio of the visual focus area with the location data of the elderly reader, associates them in real time, and supports multi-scene adaptation. It aims to solve the problems in the existing technology of single interface magnification function and separation of health monitoring and operation scenarios.

[0029] This invention integrates gaze tracking, posture correction and interface adaptation technologies, and combines sedentary reminders with dynamic interface ratio adjustment in public and home scenarios, thereby effectively alleviating eye and bone pressure on the elderly.

[0030] This invention not only fills the gap in existing technologies in multi-dimensional collaborative intervention, but also fundamentally improves the participation and quality of life of the elderly in the digital age.

[0031] The present invention mainly targets the differences in vision levels among elderly readers, sets corresponding thresholds and upper and lower limits based on their own conditions, and adjusts the magnification ratio by judging the distance between the elderly and the screen and the angle between the back and legs. At the same time, an anti-accidental touch and health management module are set up, which can not only ensure the normal setting of the interface magnification ratio during reading, but also effectively ensure the physical health of the elderly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of an embodiment of the present invention's age-friendly reading system based on visual tracking technology;

[0033] Figure 2 It is a flow chart of the sitting posture detection module in the present invention;

[0034] Figure 3 It is a flow chart of the interface zoom module in the present invention;

[0035] Figure 4 It is a schematic diagram of the flow of the anti-misoperation module in the present invention;

[0036] Figure 5 It is a schematic diagram of an application scenario of an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1:

[0040] like Figure 1 and Figure 5 As shown, the present invention provides an aging-friendly reading system based on visual tracking technology, comprising:

[0041] The gaze tracking module 01 configures an eye tracker device 13 opposite the elderly reader 11 to capture the eye movement data of the elderly reader 11 in real time, and uses a convolutional neural network model to calculate the coordinates of the gaze focus area where the gaze is focused on the user interface 12.

[0042] The sitting posture monitoring module 02 is configured to obtain the spatial coordinates of the legs, back and head of the elderly reader 11 through the camera 14, and analyze the angle θ between the back and legs and the distance Y between the head and the user interface based on the skeleton key point detection technology. n , according to Y0 and Y n Whether the absolute value of the relative error is less than 5% selects the operation maintenance mode or the adjustment mode.

[0043] Interface zoom module 05, the interface zoom module 05 is configured to combine the sight focus area coordinates calculated by the sight tracking module with the Y coordinates calculated by the sitting posture monitoring module 02. n In real-time association, when the sitting posture of the elderly reader 11 deviates from the sitting posture threshold Y0, the magnification ratio of the sight focus area in the user interface 12 is automatically adjusted to meet the reading needs of the elderly reader 11.

[0044] The anti-misoperation module 03 is configured to automatically lock the magnification ratio of the sight focus area in the user interface 12, and only readjust the magnification ratio of the sight focus area when the elderly reader makes a specific action through eye movement to select the execution of interface zooming.

[0045] The anti-misoperation module 03 obtains the data when the sitting posture monitoring module 02 determines that it is in maintenance mode, and performs sitting posture monitoring in real time in maintenance mode. If it is detected that it is in an abnormal state, the visual tracking module is called to determine whether to perform interface zooming through eye movements. If interface zooming is selected, the interface zooming module is given an execution instruction. After the interface zooming module is executed, the sitting posture monitoring is continuously performed to realize the dynamic linkage of the sitting posture monitoring module, the interface zooming module, and the anti-misoperation module.

[0046] Health management module 04, the health management module is configured to activate the sedentary timer when the sitting posture monitoring module determines that the elderly reader is in maintenance mode, and to force intervention when the elderly reader's inactivity time exceeds the set sedentary time threshold.

[0047] Example 2:

[0048] like Figure 2 As shown, the sitting posture monitoring module 02 needs to pre-determine the sitting posture threshold value Y0 of the elderly reader 11, that is, the reference distance between the head and the user interface. The system monitors the sitting posture of the elderly reader 11 in real time through the camera 14 and calculates Y n , and according to Y0 and Y nThe absolute values ​​of the relative error values ​​run different adjustment modes.

[0049] The adjustment mode is: if Y0 and Y n The absolute value of the relative error Not less than 5%, then Y0 and Y n The difference between Y0 and Y n If the relative error is less than 5%, the magnification ratio of the sight focus area is maintained and the maintenance mode is entered.

[0050] The reference distance is measured when the elderly reader 11 is in a comfortable and healthy reading posture, i.e., when the angle θ between the back and legs is between 90° and 100°. The distance Y0 between the elderly reader's head and the user interface 12 is obtained by measuring the angle. θ is measured as the angle between the mid-thigh axis and the mid-back axis in the sitting position. The camera is positioned outside the mid-region between the elderly reader and the user interface, capturing the area above the elderly reader's thighs (including the head, thighs, waist, and back) as well as the user interface.

[0051] Example 3:

[0052] like Figure 3 As shown, the interface zoom module 05 sets the zoom ratio of the sight focus area in the user interface 12 to the default ratio (100%) before running, and receives the Y0 and Y n The difference between Y0 and Y n The absolute value of the relative error is not less than 5%.

[0053] The magnification ratio adjustment strategy is to determine whether the elderly reader's sitting posture is normal (normal Less than 5%, 90°<θ<100°), if it is abnormal, determine whether it is leaning forward or backward, if it is leaning backward, reduce the magnification ratio of the sight focus area, that is, if (Y0-Y n ) is less than 0, which is negative. The magnification ratio of the sight focus area is reduced by 5%. If it is leaning forward, the magnification ratio of the sight focus area is increased. That is, if (Y0-Y n ) is greater than 0, which is positive. The magnification ratio of the sight focus area is increased by 10%. Then, it is continuously determined whether the current sitting posture reading can be maintained for 1 minute. If the 1-minute requirement is met, the magnification ratio of the sight focus area is locked. If the 1-minute requirement is not met, the sitting posture monitoring module is executed again.

[0054] If the elderly reader has a normal sitting posture, 90°<θ<100°, the interface will not be zoomed in and will remain in the maintain state. It will be determined whether this state can be maintained for 1 minute. If so, the zoom ratio of the sight focus area will be locked after one minute, and the system will enter the anti-misoperation module 03.

[0055] In this process, Y0 and Y n The positive or negative value of the difference is used to judge whether the elderly reader is leaning forward or leaning back. If it is negative, the elderly reader is leaning back; if it is positive, the elderly reader is leaning forward.

[0056] Example 4:

[0057] like Figure 4 As shown, the anti-misoperation module 03 can modify the magnification ratio of the visual focus area according to different strategies after the elderly reader 11 changes his sitting posture. The strategy is: when it is detected that the elderly reader 11 in the maintenance mode is in an abnormal sitting posture (the angle between the back and the legs is lower than 90° or higher than 100°, and the posture is maintained for more than 30 seconds), the user interface 12 prompts whether the interface magnification ratio needs to be adjusted. If the visual focus area needs to be adjusted in terms of magnification ratio, the eyes slowly sweep across the user interface 12. After the eye tracker device senses the operation, the interface zoom module 05 is executed at this time, and further determines whether the elderly reader is leaning forward or backward based on whether the angle between the back and the legs is lower than 90° or higher than 100°, thereby increasing or decreasing the magnification ratio of the visual focus area.

[0058] If there is no need to adjust the magnification ratio of the visual focus area, the eyes look outside the user interface 12 to cancel the above prompt, keep the current magnification ratio unchanged, and continue reading.

[0059] The abnormal state is that the angle θ between the back and legs of the elderly reader 11 is lower than 90° or higher than 100°, and the posture is maintained for more than 30 seconds, so as to avoid frequent reminders when the elderly reader temporarily leaves the seat for something.

[0060] After adjustment, maintain this sitting posture and read for 1 minute, then you can lock the magnification ratio and enter the maintenance mode.

[0061] Example 5:

[0062] In this embodiment, the health management module 04 is divided into a family reading mode and a public reading mode according to different reading scenarios of elderly readers.

[0063] The family reading mode sets the sedentary time threshold to 30 minutes. After exceeding the limit, the interface is forcibly locked. The reading data such as the reading time and frequency of the elderly reader 11 are counted and a health report is generated, which is sent to the guardian or community hospital in the form of charts, etc. The public reading mode only supports the sedentary reminder function, which reminds the elderly reader that they have been reading for a long time and need to rest. Functions such as health report generation are not set.

[0064] Example 6:

[0065] As attached Figure 5 As shown, the present invention provides an embodiment. In this embodiment, the camera 14 (such as an AI body sensing camera) is installed on the wall beside the elderly reader 11. The elderly reader maintains a sitting posture to read, and the angle θ between the elderly reader's back and legs and the distance Y between the head and the user interface 12 are measured. n .

[0066] The eye tracker device 13 is installed on the opposite side of the elderly reader 11, on the same side as the user interface 12, and can capture the eye movement data of the elderly reader 11 in real time, and use a convolutional neural network model to calculate the coordinates of the line of sight focus area on the user interface 12.

[0067] The interface zoom module 05 initially measures the distance Y0 between the head of the elderly reader 11 and the user interface 12 when the elderly reader 11 is in a standard sitting posture (90°<θ<100°). n The difference between the two values ​​is used to link the user interface 12 to zoom in on the sight focus area. Specifically, when the elderly reader 11 has difficulty seeing the text in the user interface 12 with a default zoom ratio of 100%, the body will lean forward (θ<90°) to bring the head close to the user interface 12. At this time, Y0>Y n , the magnification ratio of the sight focus area increases by 10%; when the magnification ratio of the sight focus area is too large or the elderly reader 11 wants to reduce the magnification ratio of the sight focus area, the distance Y between the head and the user interface 12 can be increased by leaning back (θ>100°) n , at this time Y0 <Y n , the magnification ratio of the sight focus area is reduced by 5%; when the distance Y between the head of the elderly reader 11 and the user interface 12 n When the absolute value of the relative error from the preset value Y0 is less than 5%, and this state is maintained for one minute, the magnification ratio of the visual focus area is locked in the maintenance mode, and the anti-misoperation module 03 and the health management module 04 are entered.

[0068] In this embodiment, the anti-misoperation module 03 can ensure that after the magnification ratio of the sight focus area is locked, the elderly reader 11's sitting posture changes for a short time (less than 30 seconds) (θ<90° or θ>100°), and the magnification ratio of the sight focus area will not be changed due to postures such as leaning forward or leaning back. If the elderly reader 11 is in the changed posture (θ<90° or θ>100°) for a long time (more than 30 seconds), a reminder will be displayed on the user interface 12 asking whether to adjust the magnification ratio of the sight focus area. The elderly reader 11 can re-enter the interface zoom module 05 by scanning the screen horizontally or look outside the screen to maintain the original magnification ratio of the sight focus area.

[0069] The health management module 04 records the reading time of the elderly reader 11 in a single reading session and sets a threshold of 30 minutes for sedentary time. If the threshold is exceeded, the interface will automatically lock for 10 minutes and prompt the reader to get up and move around. When the elderly reader 11 is confined to private settings such as home, the health management module will compile reading data such as reading time and frequency and generate a health report, which will be sent to the guardian or community hospital in the form of charts and other formats.

[0070] The main application scenario of this invention is computer reading. It also has an anti-accidental touch module to ensure that the original magnification ratio is maintained when elderly readers perform actions other than reading, thereby ensuring that the elderly can read efficiently. It also has a health management module to fully protect the physical health of elderly readers.

[0071] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0073] Any matters not described in the present invention are applicable to the prior art.

Claims

1. An aging-friendly reading system based on visual tracking technology, characterized in that: The application scenario is computer reading; the system includes: An eye tracking module, wherein the eye tracking module places an eye tracker device opposite the elderly reader to capture the elderly reader's eye movement data in real time and calculate the coordinates of the eye focus area on the user interface; The sitting posture monitoring module is configured to obtain the spatial coordinates of the elderly reader's legs, back and head when sitting through the camera, and calculate the angle θ between the back and legs and the distance Y between the head and the user interface in real time. n , set the sitting posture threshold Y0, Y0 is the distance between the head and the user interface when the elderly reader is in the standard sitting posture of 90°<θ<100° measured at the beginning of the operation; n If the absolute value of the relative error value is less than 5%, select the operation maintenance mode or adjustment mode; the adjustment mode is if Y0 and Y n The absolute value of the relative error is not less than 5%, then Y0 and Y n The difference between Y0 and Y n If the absolute value of the relative error is less than 5%, the magnification ratio of the sight focus area is maintained and the maintenance mode is entered; The interface zoom module is configured to combine the coordinates of the sight focus area calculated by the sight tracking module with the Y coordinates calculated by the sitting posture monitoring module. n Real-time association sets the upper and lower limits of θ for correct sitting posture. In adjustment mode, when the distance between the elderly reader's head and the user interface deviates from the sitting posture threshold Y0 and θ exceeds the upper and lower limits, the magnification ratio of the visual focus area in the user interface is automatically adjusted to meet the elderly reader's reading needs. The interface zoom module sets the zoom ratio of the sight focus area in the user interface to the default ratio of 100% before running, and receives the Y0 and Y n The difference is calculated and different magnification adjustment strategies are performed according to the positive or negative value of the difference. The amplification ratio adjustment strategy is: if Y0-Y n If the value of Y0-Y n If the value is greater than 0, the magnification ratio of the sight focus area will be increased by 10%. If the magnification ratio of the sight focus area is adjusted, the elderly reader will maintain the current sitting posture and read for one minute, and then the magnification ratio of the current sight focus area will be locked and the anti-misoperation module will be entered; An anti-misoperation module configured to automatically lock the magnification ratio of the sight focus area in the user interface and only readjust the magnification ratio of the sight focus area when the elderly reader makes an eye movement to select to zoom in and out of the interface; The anti-misoperation module modifies the magnification ratio of the sight focus area according to different strategies after the elderly reader's sitting posture changes. The strategy is as follows: when the elderly reader's sitting posture in the maintenance mode is detected to be abnormal, the user interface prompts whether the interface magnification ratio needs to be adjusted. If the magnification ratio of the sight focus area needs to be adjusted, the eyes slowly scan across the user interface, and the interface zoom module is executed at this time. If the magnification ratio of the sight focus area does not need to be adjusted, the eyes look outside the user interface to dismiss the prompt. The health management module is configured to activate the sedentary timer when the sitting posture monitoring module determines that the patient is in maintenance mode, set a sedentary time threshold, and lock the user interface when the elderly reader's inactivity time exceeds the set sedentary time threshold.

2. The age-friendly reading system based on visual tracking technology according to claim 1 is characterized in that: The reading maintenance judgment time was set to 1 min, and the sedentary time threshold was set to 30 min; the upper and lower limits of θ were set to 100° and 90°, respectively.

3. The age-friendly reading system based on visual tracking technology according to claim 1, characterized in that: The abnormal state is that the angle between the back and legs of the elderly reader is less than 90 degrees or greater than 100 degrees, and the current posture is maintained for more than 30 seconds.

4. The age-friendly reading system based on visual tracking technology according to claim 1, characterized in that: The health management module is divided into family reading mode and public reading mode according to the different reading scenarios of elderly readers; The family reading mode sets the sedentary time threshold at 30 minutes. After exceeding the limit, the user interface is forcibly locked. The reading data of elderly readers, including reading time and frequency, is counted and a health report is generated and sent to the guardian or community hospital. The public reading mode only supports sedentary reminders and does not set health report generation.

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