AR Overlay of External Device Status on Camera Preview

The patent uses a mobile terminal as an intermediary device between the external device and the user. The mobile terminal captures images of the external device, processes operation state information, and displays augmented reality overlays showing component status. This intermediary approach allows complex information processing to occur on the mobile terminal rather than requiring the external device itself to have augmented reality capabilities, thus improving information accessibility while limiting the increase in external device complexity.

The patent overlays operation state information as visual indicators on top of the camera preview image, adding an informational dimension to the existing visual display. Instead of requiring users to switch between viewing the device and checking separate status displays, the system superimposes status indicators directly on the image of the external device, showing component operation states at their corresponding physical locations. This dimensional approach improves ease of operation by making information immediately visible while concentrating processing requirements in the mobile terminal's software layer.

The system pre-stores correspondence data between external device components and their locations in the image. When capturing an image of the external device, the mobile terminal retrieves this pre-established mapping information and uses it to quickly place operation state indicators at the correct locations. This preliminary preparation of component-image location mappings allows the system to achieve precise component location accuracy without performing complex real-time image analysis, thus reducing processing time while maintaining measurement precision.