360 Bird's Eye View Camera Stitching Operation Manual

12.1 Step 1: Enter 360 Surround View System

Find and click the "360 Surround View" entry on the device's main interface to enter the surround view control interface.

Interface Display Content:

• Display Mode: Supports switching between 2D display and 3D display.
• View Partition: The interface is divided into four camera view areas: "Front View", "Rear View", "Left View", "Right View".
• Function Buttons: There is a "Settings" button at the bottom or side of the interface (core operation entry, needed for subsequent steps).

22.2 Step 2: Enter System Settings Interface

In the 360 Surround View interface, click the "Settings" button to enter the main settings interface.

Settings Interface Contains the Following Core Options:

• Vehicle Model Settings: Adjust vehicle model color, scaling ratio, black edge removal (ON/OFF), 2D rear view scale line (ON/OFF), etc.
• View Settings: Supports display mode switching such as "Left Split Screen".
• Original Vehicle Settings: Match basic vehicle information (such as sedan, SUV, MPV, Mercedes-Benz GLE, etc.).
• Recording Settings: Manage recording related parameters (not core to stitching, not expanded here).
• Remote Service: Device remote functions (not core to stitching, not expanded here).
• Parameter Management: Core entry for stitching debugging, used to enter stitching settings, parameter import/export, restore defaults, etc.

32.3 Step 3: Enter Stitching Parameter Management Interface

In the settings interface, click the "Parameter Management" option to enter the parameter management interface.

Interface Core Functions:

• Stitching: Click to enter the "Calibration Cloth Selection and Stitching Method Settings" interface (key entry for stitching operations).
• Import Parameters: Import saved stitching parameters (suitable for secondary debugging of the same vehicle model).
• Export Parameters: Save the current debugged stitching parameters (for backup).
• Restore Defaults: Reset to system default stitching parameters (suitable when parameters are confused).
• Activation Information: View device activation status (not core to stitching).

42.4 Step 4: Select Stitching Method and Calibration Cloth Type

After clicking the "Stitching" option, enter the "Calibration Cloth Selection and Stitching Method" interface, where two selections need to be completed:

2.4.1 Select Stitching Method (Choose One)

Stitching Method	Applicable Scenarios	Operation Points
Lens-Free Stitching	No need for precise camera model matching, simpler operation	No need to select camera model, directly enter calibration cloth selection
Lens Selection Stitching	Need to precisely match the installed camera model (ensure stitching accuracy)	Need to select the model corresponding to the actually installed camera in subsequent steps

2.4.2 Select Stitching Mode (Choose One)

• Automatic Stitching: The system automatically recognizes the calibration cloth and completes basic calibration (recommended for beginners, high efficiency).
• Manual Stitching: Need to manually position key points of the calibration cloth (suitable when automatic stitching effect is poor).

2.4.3 Select Calibration Cloth (Core)

• For lens-free stitching: Priority selection of "Large Black Block Calibration Cloth" (recommended by documentation, higher calibration accuracy), left and right calibration cloths can be omitted or used only for reference.
• For lens selection stitching: In manual calibration scenarios, left and right calibration cloths do not need to be placed, only front/rear large calibration cloths are needed.

52.5 Step 5: Place Calibration Cloths (Critical Step, Affects Stitching Accuracy)

After completing the stitching method selection, place the calibration cloths and tape measures according to the following requirements to ensure the basis for image calibration:

2.5.1 Calibration Cloth Placement Rules (Taking "Lens-Free + Automatic Stitching + Large Black Block Calibration Cloth" as an Example)

• Front/Rear Large Calibration Cloth Placement:
  • Position: Place 1 large calibration cloth in the area corresponding to the front camera, and 1 large calibration cloth in the area corresponding to the rear camera.
  • Attitude: The large calibration cloth should be placed centrally and perpendicular to the vehicle body (ensure parallel to the vehicle body, can be assisted with tape measures for alignment).
  • Distance: The distance from the front calibration cloth to the front of the vehicle and from the rear calibration cloth to the rear of the vehicle is based on "the screen can completely display the calibration cloth"; the closer the edge of the cloth is to the camera's visible range, the smaller the vehicle's blind spot.
• Tape Measure Placement:
  • Take 2 tape measures with length > 5m, place them parallel to the ground along the front and rear directions of the vehicle body (assist in calibrating the parallelism between the vehicle body and the calibration cloth).

2.5.2 Camera Installation Requirements (Pre-check to Avoid Stitching Deviation)

• The camera image should be parallel to the vehicle body, with "just able to see the edge of the vehicle body" as the baseline.
• The installation angles of the left and right cameras should be as consistent as possible, and the "black squares" of the front/rear calibration cloths should be visible (ensuring key point recognition).

62.6 Step 6: Input Vehicle Parameters (Required, Accuracy Affects Stitching Effect)

After placing the calibration cloths, click the "Enter Vehicle Parameters" button in the interface to enter the parameter input interface.

Required Parameter List (Unit: m, items with * are required, need to be actually measured with tape measure):

Parameter Name	Measurement and Entry Points
Vehicle Length	Measure the distance between the farthest front and rear ends of the vehicle (such as the straight-line distance from the front to the rear)
Vehicle Width	Measure the distance at the widest point left and right of the vehicle (usually the distance between the outside of the rearview mirrors)
Vehicle Height	Measure the distance from the bottom of the vehicle to the highest point at the top
Wheelbase	Measure the distance from the center of the front wheel to the center of the rear wheel
Front Wheel Track	Measure the distance between the centers of the left and right front wheels
Rear Overhang	Measure the distance from the center of the rear wheel to the rear of the vehicle
Rearview Mirror - Front of Vehicle	Measure the distance from the outside of the rearview mirror to the frontmost part of the vehicle
Rear of Vehicle - Rear Calibration Cloth	Measure the straight-line distance from the rearmost part of the vehicle to the rear calibration cloth
Front of Vehicle - Front Calibration Cloth	Measure the straight-line distance from the frontmost part of the vehicle to the front calibration cloth
Front/Rear/Left/Right Camera Height	Measure the vertical distance from the center of the corresponding camera to the ground respectively

After filling in the parameters, carefully check (avoid numerical errors), and after confirming there are no errors, click the "Start Stitching" button.

72.7 Step 7: Complete Stitching (Automatic + Manual Combination)

2.7.1 Automatic Stitching Process

• After clicking "Start Stitching", the system will automatically recognize the positions of the front/rear calibration cloths and complete basic image calibration.
• After automatic calibration is completed, the system will automatically enter the "Manual Stitching Interface" (for fine-tuning key points to ensure seamless stitching).

2.7.2 Manual Stitching (Key Point Calibration)

• Interface Operation: Click the "Front View", "Rear View", "Left View", "Right View" partitions on the left panoramic image to switch to the corresponding camera's calibration interface.
• Calibration Rules: Each view corresponds to 8 calibration key points, which need to be adjusted as follows:
  • Drag key points: Directly drag the key point icons in the interface to adjust to the corresponding corners of the calibration cloth (such as the four corners of the large black block).
  • Fine-tuning and quick movement: Short press the key point for fine-tuning (1-2 pixels), long press the key point for quick movement to the target position.
• After completing the calibration of a single view, click the "Save" button, then switch to the next view (front→rear→left→right). After all four views are calibrated, click the "Complete" button to finish the basic stitching.

2.7.3 Common Manual Stitching Problem Adjustments

Problem Phenomenon	Adjustment Method
Front/Rear/Left/Right images are chaotic	Reposition the key points of the calibration cloth, ensuring that the 8 points of each view accurately correspond to the corners of the calibration cloth
Slight deformation of front/rear image calibration cloth left/right corners	If the calibration cloth image deforms upward/downward, move the corresponding view's "coordinate points 1, 6" 1-2 pixels in the deformation direction
Left/right images tilt upward	Move the corresponding view's "coordinate point 5" 1-2 pixels to the left

82.8 Step 8: Post-Stitching Fine-Tuning (Resolve Image Deviation)

After stitching is completed, if problems such as image bending, non-parallelism, misalignment, or horn-shaped distortion occur, you need to enter the "Fine-Tuning Interface" (the interface will retain the fine-tuning button after stitching is completed) and adjust according to the following methods:

Problem Type	Adjustment Function	Operation Points
Image bending with curvature (e.g., front view image appears curved)	Concavity/Convexity value adjustment	Drag the "Concavity/Convexity" slider, increase/decrease the value until the image returns to a straight line (front view bending adjusts the concavity/convexity value corresponding to the front view center point, same for rear/left/right views)
Image non-parallelism (e.g., front view image is tilted)	Displacement value adjustment	Drag the "Displacement" slider, adjust the value until the image is parallel to the vehicle body (front view non-horizontal adjusts the displacement value corresponding to the front view center point)
Stitching seam misalignment (e.g., left front/right front/left rear/right rear stitching areas have fractures)	Stitching seam left/right shift	If left front stitching seam is misaligned, click the "Right Shift" button for "Left Front Stitching Seam"; if right front is misaligned, click the "Left Shift" button for "Right Front Stitching Seam" until seamless
Horn-shaped distortion of stitching seam (e.g., front view stitching seam appears horn-shaped)	Stitching seam left/right rotation	If left front stitching seam appears horn-shaped, click the "Right Rotation" button for "Left Front Stitching Seam"; if right front is distorted, click the "Left Rotation" button for "Right Front Stitching Seam" until normal