In some cases the camera will always use the center of the frame for this. This is usually done by measuring how sharp a particular area of the frame is, and by adjusting the lens assembly until it is maximally sharp. Some lens assemblies can automatically be adjusted so that an object at different distances from the camera can be kept in focus. The lenses themselves can sometimes be moved to adjust things like focus and zoom, or they might be fixed in an arrangement to give a good balance between objects in focus, and cost. The Lens AssemblyĪt one end of the camera assembly is the lens assembly (one or more lenses, arranged to focus light onto the sensor). If you're already familiar with this, you can skip ahead to Camera implementation details. In order to use the camera classes a quick overview of the way a camera works is needed. There are both C++ and QML APIs for common tasks. The Qt Multimedia API provides a number of camera related classes, so you can access images and videos from mobile device cameras or webcameras.
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