Method and system for assisting back-shooting preview and shooting of mobile phone

Abstract

The invention discloses a method and a system for assisting back-shooting preview and shooting of a mobile phone. The method comprises the following steps of: 1, installing hardware equipment on the back of the mobile phone by a user; 2, the mobile phone is connected with the hardware equipment through App scanning, and the camera is turned on through the App end of the mobile phone; 3, transmitting a picture shot by a rear camera of the mobile phone to display hardware of the hardware equipment in real time; 4, the user previews the shot picture in real time through display hardware and performs composition adjustment; 5, triggering shooting by a user through a display hardware touch starting control module; and 6, turning off the camera shooting function of the mobile phone, and synchronizing the time of the mobile phone by the display hardware for displaying. According to the invention, the transmission of the shooting instruction and the transmission control of the shooting picture are respectively realized by utilizing the dual-channel transmission of Bluetooth and WiFi, and the communication resources are dynamically allocated by adopting a priority scheduling algorithm, so that the communication delay is reduced, and the self-shooting by utilizing the rear camera of the mobile phone is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone camera assistance, and particularly relates to a method and system for assisting the preview and shooting of the rear camera of a mobile phone. Background Art

[0002] With the continuous improvement of the photography function of smart phones, more and more users hope to use the rear camera of the mobile phone for selfies more conveniently. The traditional selfie method often requires users to find a suitable angle and pose, and the shooting effect cannot be previewed in real time during the shooting process, resulting in an unsatisfactory shooting result.

[0003] Moreover, the pixel of the rear camera of the mobile phone is better than that of the front camera. Therefore, some selfie enthusiasts need to use the rear camera of the mobile phone for selfies. However, for selfies, the angle and pose need to be adjusted, and it is impossible to preview whether the adjusted angle and pose are correct. Therefore, a smart bracelet is used to connect to the mobile phone for selfie preview. However, for existing such devices, during connection and signal transmission, they are all transmitted through Bluetooth. In this way, during photo shooting and picture transmission, the single-channel instruction transmission of Bluetooth will be stuck, resulting in the picture and shooting execution being out of sync. Furthermore, it will cause the shooter to think that the shooting is complete and change the pose, thus affecting the shooting effect. In view of this, this solution proposes a method and system for assisting the preview and shooting of the rear camera of a mobile phone to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for assisting the preview and shooting of the rear camera of a mobile phone to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for assisting the preview and shooting of the rear camera of a mobile phone includes the following steps:

[0006] First step, first, the user installs the hardware device on the back of the mobile phone, and exposes the area of the rear camera of the mobile phone;

[0007] Second step, start the hardware device. The mobile phone scans and connects to the Bluetooth of the hardware device through the App. After the mobile phone and the hardware device are connected, the camera is opened through the mobile phone App;

[0008] Third step, select the rear camera of the mobile phone as the shooting source, and the picture captured by the rear camera of the mobile phone is transmitted to the display hardware of the hardware device in real time through the wireless communication module;

[0009] Fourth step, the user previews the shooting picture in real time through the display hardware and adjusts the composition;

[0010] Fifth step, the user touches and activates the control module through the display hardware to trigger shooting and complete the selfie;

[0011] Step 6: Turn off the mobile phone's camera function, display the hardware-synchronized mobile phone time, and edit the time.

[0012] Preferably, when installing the hardware device in the first step, any one of magnetic attraction, nano adsorption glue or snap connection is adopted. After the hardware device is attached to the back of the mobile phone, the camera area is not blocked.

[0013] Preferably, after the hardware device is started, the user turns on the power of the hardware device. The mobile phone App automatically scans for nearby Bluetooth devices and displays a list of connectable devices. After the user clicks to pair, the device and the mobile phone establish a low-power connection via Bluetooth, and at the same time, establish a high-definition data transmission channel via WiFi. Then the App automatically requests permissions for the mobile phone's camera, storage, and location.

[0014] Preferably, in the scenario of Bluetooth and WiFi dual-channel cooperation, communication resources are dynamically allocated through a priority scheduling algorithm. The Bluetooth control instructions and the WiFi image data transmission requests are stored in different priority queues respectively. The Bluetooth instruction queue is set to the highest priority, and the WiFi data queue is set to the second highest priority. Requests are processed according to the queue priority order, and the tasks in the Bluetooth instruction queue are executed first.

[0015] Preferably, the steps executed by the priority scheduling algorithm include:

[0016] A1. First, perform queue initialization, define two types of queues, including the Bluetooth instruction queue and the WiFi data transmission queue. The Bluetooth instruction queue adopts preemptive scheduling, allowing interruption of the currently transmitted WiFi data. The types of the Bluetooth instruction queue and the WiFi data transmission queue are identified and distinguished through the data packet header.

[0017] A2. Combine the Q-Learning algorithm to dynamically adjust the priority weights. When the user frequently triggers Bluetooth instructions, the system automatically increases the bandwidth occupancy ratio of the Bluetooth channel through the reinforcement learning model. Conversely, in the stable preview stage, increase the resource allocation for WiFi data transmission.

[0018] A3. Adopt a dual-token random polling algorithm for Bluetooth internal scheduling optimization. The two tokens correspond to high-priority instructions and ordinary instructions respectively.

[0019] A4. Establish a radio resource allocation strategy. The Bluetooth instructions are allocated high-frequency channels, and the WiFi data is allocated wide-frequency channels. The calculation of the weight is expressed as:

[0020] Scheduling priority = α · Service urgency + β · Channel quality + γ · Historical delay (1);

[0021] α + β + γ = 1 (2);

[0022] Among them, α, β, and γ respectively represent the weights of the corresponding parts, and the α of the Bluetooth instruction is greater than the α of the WiFi data;

[0023] A5. Based on the distributed WLAN full-duplex link scheduling algorithm, through time-division multiplexing and space-division multiplexing technologies, the transmission time periods and spatial paths of Bluetooth and WiFi are separated. Bluetooth uses short-frame burst transmission, and the WiFi data compresses the transmission volume through dynamic code rate adjustment and reserves time gaps.

[0024] Preferably, after the mobile phone rear camera captures a picture, the mobile phone-side App compresses the captured picture using H.265 encoding and transmits it to the display hardware of the hardware device via WiFi.

[0025] Preferably, the composition adjustment is to adjust the composition through touch gestures, and the display hardware displays a focus frame and an exposure adjustment bar.

[0026] Preferably, when the user clicks the shutter button or the gesture area of the display hardware, the hardware device sends a shutter instruction to the mobile phone via Bluetooth, and the mobile phone executes the shooting and saves the photo to the album.

[0027] Preferably, when the user closes the App or manually switches to the clock mode, the display hardware displays an electronic watch face, and the user enters the watch face editing mode by double-clicking the screen, and selects the watch face style and time setting through touch.

[0028] A system for assisting mobile phone rear camera preview and shooting, which is applied to the method for assisting mobile phone rear camera preview and shooting. The system is composed of a hardware device, a mobile phone-side App, and a wireless communication module;

[0029] The hardware device includes an installation hardware, a display hardware, a communication component, and a power management component. The installation hardware is used for the installation of the system on the back of the mobile phone. The display hardware is used for real-time display of the mobile phone rear camera picture, time, date, and dynamic watch face. The communication component includes a Bluetooth unit and a WiFi unit. The Bluetooth unit is used for receiving control instructions, and the WiFi unit is used for receiving the compressed real-time video stream. And the communication component executes a priority scheduling algorithm, and Bluetooth instructions are given priority for transmission. The power management component is used for the charge and discharge control of the hardware device;

[0030] The mobile phone-side App includes a camera control module, a transmission module, and a security management module. The camera control module is used for calling the mobile phone camera to capture pictures in real time. The transmission module compresses the video stream by H.265 encoding and transmits it to an external device via WiFi. The security management module is used for applying for permissions for the mobile phone camera, storage, and location, and encrypting the transmitted data;

[0031] The wireless communication module includes a dual-channel cooperation protocol and a time synchronization protocol. The dual-channel cooperation protocol is used for Bluetooth and WiFi to transmit control instructions and image data in a division-of-labor manner, and reduces signal interference through time-division multiplexing and space-division multiplexing. The time synchronization protocol synchronizes the mobile phone system time to the dynamic dial through Bluetooth and supports offline independent timing.

[0032] Technical effects and advantages of the present invention:

[0033] Through the design of the system and method of the present invention, the dual-channel transmission of Bluetooth and WiFi is utilized to separately implement the transmission of shooting instructions and the transmission control of shooting pictures, and the priority scheduling algorithm is adopted to dynamically allocate communication resources, reducing communication latency. In this way, when controlling the camera during the preview self-timer state, the camera can respond faster, making it more convenient and effective to take selfies using the rear camera of the mobile phone. Description of the Drawings

[0034] Figure 1 It is the operation flowchart of the preview shooting method of the present invention. Detailed Embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1, the present invention provides a method for assisting the preview and shooting of the rear camera of a mobile phone as Figure 1 shown, including the following steps:

[0037] First step, first, the user installs the hardware device on the back of the mobile phone, and exposes the area of the rear camera of the mobile phone;

[0038] Specifically, when installing the hardware device in the first step, any one of magnetic attraction, nano-adhesive, or snap connection is adopted, and after the hardware device is attached to the back of the mobile phone, the camera area is not blocked.

[0039] It should be noted that when setting the connection of the hardware device, holes are opened on the corresponding connection housing structure, and the holes are used for the penetration and exposure of the rear camera area of the mobile phone, so as to avoid blocking the rear camera area of the mobile phone. At the same time, installing the entire hardware device on the back of the mobile phone is also convenient for using the rear camera of the mobile phone to collect images. When the user can directly preview the real-time picture.

[0040] Step 2: Start the hardware device. The mobile phone scans and connects to the Bluetooth of the hardware device through the App. After the connection between the mobile phone and the hardware device is established, the camera is opened through the mobile phone App.

[0041] Specifically, after the hardware device is started, the user turns on the power of the hardware device. The mobile phone App automatically scans for nearby Bluetooth devices and displays a list of connectable devices. After the user clicks to pair, the device and the mobile phone establish a low-power connection through Bluetooth, and at the same time establish a high-definition data transmission channel through WiFi. Then the App automatically applies for permissions for the mobile phone camera, storage, and location to ensure the availability of functions.

[0042] Step 3: Select the rear camera of the mobile phone as the shooting source. The image captured by the rear camera of the mobile phone is transmitted in real time to the display hardware of the hardware device through the wireless communication module.

[0043] Specifically, in the scenario of dual-channel coordination of Bluetooth and WiFi, communication resources are dynamically allocated through a priority scheduling algorithm. The Bluetooth control instructions and the WiFi image data transmission requests are stored in different priority queues respectively. The Bluetooth instruction queue is set to the highest priority, and the WiFi data queue is the second priority. Requests are processed according to the queue priority order, and the tasks in the Bluetooth instruction queue are executed first.

[0044] It should be noted that the Bluetooth control instructions include shutter trigger and mode switch. At the same time, when connecting the mobile phone and the hardware device, after the first Bluetooth connection is established, subsequent Bluetooth / WiFi automatic pairing can be triggered through the NFC tag, reducing the user operation steps.

[0045] Furthermore, the steps executed by the priority scheduling algorithm include:

[0046] A1. First, perform queue initialization. Define two types of queues, including the Bluetooth instruction queue and the WiFi data transmission queue. The Bluetooth instruction queue adopts preemptive scheduling, allowing interruption of the WiFi data being transmitted. The types of the Bluetooth instruction queue and the WiFi data transmission queue are identified and distinguished through the data packet header.

[0047] It should be noted that the data packet header identifier of the Bluetooth instruction queue can be marked as Critical, and the data packet header identifier of the WiFi data transmission queue can be marked as Normal.

[0048] A2. Combine the Q-Learning algorithm to dynamically adjust the priority weights. When the user frequently triggers Bluetooth instructions (shutter instructions), the system automatically increases the bandwidth occupancy ratio of the Bluetooth channel through the reinforcement learning model. Conversely, in the stable preview stage, the resource allocation for WiFi data transmission is increased.

[0049] It should be noted that when implementing dynamic adjustment of priority weights, first perform state perception, monitor network latency, signal strength, and queue backlog parameters in real time, then design a reward function, define the reward value with the instruction response time (Bluetooth) and data throughput (WiFi) as the optimization objectives, and finally perform policy update. Train the Q-Learning model through historical data to generate an optimal scheduling policy table.

[0050] A3. The double-token random polling algorithm is adopted for Bluetooth internal scheduling optimization. The two tokens respectively correspond to high-priority instructions (shutter trigger) and ordinary instructions (time synchronization), which solves the fairness problem of traditional Bluetooth polling and ensures that emergency tasks are executed first.

[0051] It should be noted that by optimizing the Bluetooth internal scheduling, the polling cycle is shortened, the average response time of Bluetooth instructions is reduced by more than 30%, random access order is supported, and low-priority tasks are prevented from blocking critical instructions.

[0052] A4. Establish a radio resource allocation policy. Bluetooth instructions are allocated high-frequency band channels to improve anti-interference ability and low latency, and WiFi data is allocated wide-frequency band channels to improve throughput. The calculation of the weight is expressed as:

[0053] Scheduling priority = α · service urgency + β · channel quality + γ · historical delay (1);

[0054] α + β + γ = 1 (2);

[0055] Among them, α, β, and γ respectively represent the weights of the corresponding parts, and α of Bluetooth instructions is greater than α of WiFi data.

[0056] A5. Based on the distributed WLAN full-duplex link scheduling algorithm, through time-division multiplexing and space-division multiplexing technologies, separate the transmission time slots and space paths of Bluetooth and WiFi, reduce co-channel interference. Bluetooth uses short-frame burst transmission, and WiFi data compresses the transmission volume through dynamic coding rate adjustment, and reserves time gaps for Bluetooth to preempt.

[0057] It should be noted that through dynamic scheduling adjustment, delay optimization can be achieved, so that the average response time of Bluetooth instructions ≤ 50 ms, the WiFi image transmission delay is stable at 80 - 120 ms; throughput balance, the WiFi channel utilization rate reaches more than 85%, and the Bluetooth instruction packet loss rate < 0.1%; power consumption control, through the dynamic sleep mechanism (turn off the WiFi radio frequency module when there is no task), the device battery life is increased by 20%.

[0058] Specifically, after the mobile phone rear camera captures the picture, the mobile phone-side App compresses the captured picture using H.265 encoding and then transmits it to the display hardware of the hardware device through WiFi.

[0059] Step 4: The user previews the captured image in real time through the display hardware and adjusts the composition.

[0060] Specifically, the composition adjustment is to adjust the composition through touch gestures (pinch zooming, swiping), the display hardware shows the focus frame and the exposure adjustment bar, and the user clicks on the screen to select the focus point.

[0061] It should be noted that for the touch interaction of the display hardware, touch mapping technology is required to map the touch coordinates of the display hardware to the mobile phone screen coordinate system to achieve precise operation. The display screen refresh rate ≥ 60Hz, and the OLED material is used to reduce the screen smear. At the same time, the screen brightness is automatically adjusted by the device-side light sensor to improve outdoor visibility.

[0062] Step 5: The user triggers the shooting by touching the start control module of the display hardware to complete the self-shooting.

[0063] Specifically, the user clicks the shutter button or the gesture area of the display hardware, and the hardware device sends the shutter command to the mobile phone through Bluetooth. The mobile phone executes the shooting and saves the photo to the album.

[0064] Step 6: Turn off the mobile phone camera function, and the display hardware synchronizes and displays the mobile phone time and edits the time.

[0065] Specifically, the user closes the App or manually switches to the clock mode. The display hardware shows the electronic dial, and the user enters the dial editing mode by double-clicking the screen, and selects the dial style and time setting through touch.

[0066] It should be noted that the display of the display hardware includes two modes, namely the camera mode and the clock mode. When in the camera mode, the OLED full-color display is enabled to give priority to ensuring the smoothness of the picture. When in the clock mode, it switches to the electronic ink screen display, and relies on the time synchronization protocol to automatically synchronize the mobile phone system time through Bluetooth, supporting offline independent timing (built-in RTC clock chip); for the transmission of dial data, the custom dial data (compressed into JSON + picture format) is transmitted through WiFi direct connection or Bluetooth.

[0067] Embodiment 2: The present invention provides a system for assisting the preview and shooting of the rear camera of a mobile phone, which is applied to a method for assisting the preview and shooting of the rear camera of a mobile phone in Embodiment 1. The system is composed of a hardware device, a mobile phone-side App, and a wireless communication module.

[0068] The hardware device includes installation hardware, display hardware, communication components, and a power management component. The installation hardware is used for the system to be installed on the back of the mobile phone. The display hardware is used to display the rear camera image, time, date, and dynamic dial of the mobile phone in real time. The communication components include a Bluetooth unit and a WiFi unit. The Bluetooth unit is used to receive control instructions, and the WiFi unit is used to receive the compressed real-time video stream. Moreover, the communication components execute a priority scheduling algorithm, with Bluetooth instructions being given priority for transmission. The power management component is used for the charge and discharge control of the hardware device;

[0069] It should be noted that the installation hardware adopts a thin body structure, with a flexible circuit board stack design, a thickness ≤ 3mm, and the edge curvature matching the mobile phone camera module. The display hardware adopts a micro display electronic ink screen (dual-mode optional) and supports touch operation. The power management component uses independent power supply, a micro lithium battery, and supports wired and wireless charging.

[0070] The mobile phone app includes a camera control module, a transmission module, and a security management module. The camera control module is used to call the mobile phone camera to collect images in real time. The transmission module compresses the video stream through H.265 encoding and transmits it to an external device via WiFi. The security management module is used to apply for permissions for the mobile phone camera, storage, and location, and to encrypt the transmitted data;

[0071] It should be noted that the camera control module supports touch instruction mapping, converting the external screen operation into mobile phone camera control; a touch gesture recognition algorithm, including two-finger zooming and sliding exposure adjustment; the transmission module adopts H.265 hardware-accelerated encoding (bit rate ≤ 5Mbps) and a dynamic bit rate adjustment algorithm (optimizing the resolution according to the network signal); the security management module includes a system-level permission management interface and an end-to-end encryption protocol.

[0072] The wireless communication module includes a dual-channel cooperation protocol and a time synchronization protocol. The dual-channel cooperation protocol is used for the Bluetooth and WiFi to divide the work to transmit control instructions and image data, and reduces signal interference through time-division multiplexing and space-division multiplexing. The time synchronization protocol synchronizes the mobile phone system time to the dynamic dial via Bluetooth and supports offline independent timing.

[0073] It should be noted that the dual-channel cooperation protocol adopts a distributed WLAN full-duplex link scheduling algorithm and short-frame burst transmission technology (single Bluetooth instruction transmission ≤ 5ms).

[0074] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for assisting the rear camera preview and shooting of a mobile phone, characterized in that The method for previewing and shooting includes the following steps: In the first step, the user first installs the hardware device on the back of the mobile phone, exposing the area of the rear camera of the mobile phone; In the second step, start the hardware device. The mobile phone scans and connects to the Bluetooth of the hardware device through the App. After the connection between the mobile phone and the hardware device is established, the camera is opened through the mobile phone App; In the third step, select the rear camera of the mobile phone as the shooting source. The image captured by the rear camera of the mobile phone is transmitted to the display hardware of the hardware device in real time through the wireless communication module; In the fourth step, the user previews the shooting image in real time through the display hardware and adjusts the composition; In the fifth step, the user touches and activates the control module through the display hardware to trigger shooting and complete the self-timer; In the sixth step, turn off the camera function of the mobile phone. The display hardware synchronizes and displays the mobile phone time and edits the time.

2. The method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, characterized in that, When installing the hardware device in the first step, any one of magnetic attraction, nano adsorption glue or snap connection is adopted. After the hardware device fits with the back of the mobile phone, the camera area is not blocked.

3. A method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, characterized in that, After the hardware device is started, the user turns on the power of the hardware device. The mobile phone App automatically scans for nearby Bluetooth devices and displays a list of connectable devices. After the user clicks to pair, the device and the mobile phone establish a low-power connection through Bluetooth, and at the same time establish a high-definition data transmission channel through WiFi. Then the App automatically requests permissions for the mobile phone camera, storage and location.

4. The method for assisting the rear camera preview and shooting of a mobile phone according to claim 3, wherein, In the scenario of coordinated operation of the Bluetooth and WiFi dual channels, communication resources are dynamically allocated through the priority scheduling algorithm. The Bluetooth control instructions and the WiFi image data transmission requests are stored in different priority queues respectively. The Bluetooth instruction queue is set to the highest priority, and the WiFi data queue is set to the second priority. Requests are processed according to the queue priority order, and tasks in the Bluetooth instruction queue are executed first.

5. A method for assisting the rear camera preview and shooting of a mobile phone according to claim 4, characterized in that, The steps executed by the priority scheduling algorithm include: A1, First, perform queue initialization, define two types of queues, including the Bluetooth instruction queue and the WiFi data transmission queue. The Bluetooth instruction queue adopts preemptive scheduling and allows interruption of the WiFi data being transmitted. The types of the Bluetooth instruction queue and the WiFi data transmission queue are identified and distinguished through the data packet header; A2, Combine the Q-Learning algorithm to dynamically adjust the priority weights. When the user frequently triggers Bluetooth instructions, the system automatically increases the bandwidth occupancy ratio of the Bluetooth channel through the reinforcement learning model. Conversely, in the stable preview stage, increase the resource allocation for WiFi data transmission; A3, Adopt the dual-token random polling algorithm to optimize the internal scheduling of Bluetooth. The two tokens correspond to high-priority instructions and ordinary instructions respectively; A4, Establish a wireless resource allocation strategy. The Bluetooth instructions are allocated high-frequency channels, and the WiFi data is allocated wide-frequency channels. The calculation of the weight is expressed as: Scheduling priority = α · Service urgency + β · Channel quality + γ · Historical delay (1); α + β + γ = 1 (2); Among them, α, β and γ respectively represent the weights of the corresponding parts, and α of the Bluetooth instructions is greater than α of the WiFi data; A5. Based on the distributed WLAN full-duplex link scheduling algorithm, through time-division multiplexing and space-division multiplexing technologies, it separates the transmission time periods and spatial paths of Bluetooth and WiFi. Bluetooth uses short-frame burst transmission, and WiFi data compresses the transmission volume through dynamic code rate adjustment and reserves time gaps.

6. The method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, wherein After the mobile phone's rear camera captures a picture, the mobile phone app compresses the captured picture using H.265 encoding and transmits it to the display hardware of the hardware device via WiFi.

7. A method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, characterized in that, The composition adjustment is to adjust the composition through touch gestures, and the display hardware displays the focus frame and exposure adjustment bar.

8. A method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, characterized in that, The user clicks the shutter button or gesture area of the display hardware, and the hardware device sends a shutter command to the mobile phone via Bluetooth. The mobile phone executes the shooting and saves the photo to the album.

9. A method for assisting the rear camera preview and shooting of a mobile phone according to claim 1, characterized in that, When the user closes the app or manually switches to the clock mode, the display hardware displays the electronic dial. And the user enters the dial editing mode by double-clicking the screen, and selects the dial style and sets the time through touch.

10. A system for assisting the rear camera preview and shooting of a mobile phone, which is applied to the method for assisting the rear camera preview and shooting of a mobile phone according to any one of claims 1-9, and is characterized in that, The system consists of a hardware device, a mobile phone app, and a wireless communication module; The hardware device includes an installation hardware, a display hardware, a communication component, and a power management component. The installation hardware is used for installing the system on the back of the mobile phone. The display hardware is used for real-time display of the mobile phone's rear camera picture, time, date, and dynamic dial. The communication component includes a Bluetooth unit and a WiFi unit. The Bluetooth unit is used for receiving control commands, and the WiFi unit is used for receiving the compressed real-time video stream. And the communication component executes a priority scheduling algorithm, with Bluetooth instructions being transmitted first. The power management component is used for charge and discharge control of the hardware device; The mobile phone app includes a camera control module, a transmission module, and a security management module. The camera control module is used for calling the mobile phone camera to capture pictures in real-time. The transmission module compresses the video stream using H.265 encoding and transmits it to an external device via WiFi. The security management module is used for applying for permissions for the mobile phone camera, storage, and location, and encrypting the transmitted data; The wireless communication module includes a dual-channel cooperation protocol and a time synchronization protocol. The dual-channel cooperation protocol is used for Bluetooth and WiFi to divide the work to transmit control commands and image data, and reduces signal interference through time-division multiplexing and space-division multiplexing. The time synchronization protocol synchronizes the mobile phone system time to the dynamic dial via Bluetooth and supports offline independent timing.

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