FrameAcquiredFcn

FrameAcquiredFcn is a callback function in MATLAB's Image Acquisition Toolbox. It is designed to execute a specified function whenever a new frame is acquired by the camera or imaging device. This callback allows users to perform custom operations in real-time as image data becomes available, without needing to poll the acquisition object manually.

To use FrameAcquiredFcn, a user must first create an imaging device object using functions like videoinput. Then, they can assign a handle to a function to the DeviceSpecificProperties property 'FrameAcquiredFcn'. This function will be executed automatically by the toolbox each time a frame is captured. The user-defined function typically receives the source object (the imaging device) and a metadata object as arguments, providing access to the acquired frame and its associated information.

Common applications for FrameAcquiredFcn include real-time image processing, such as feature detection, object tracking, or applying filters immediately after acquisition. It can also be used for logging image data, updating a display in real-time, or triggering subsequent events based on the acquired image content. Efficient implementation of the FrameAcquiredFcn is crucial to avoid dropping frames or hindering the acquisition process, as the function executes synchronously with the data acquisition.