A collection of different representations of a single image captured from a camera.
A Frame object can include an arbitrary number of image representations in different formats or resolutions together with a time stamp and frame index.
If any of the configured Trackers require particular frame formats internally, these will be included in getNumImages()/getImage(). It is not possible to predict in advance exactly which frame formats will be used, however, so if you require a specific image representation you should request it using Vufora::setFrameFormat().
Frame implements the RAII pattern: A newly created frame holds new image data whereas copies share this data. The image data held by Frame exists as long as one or more Frame objects referencing this image data exist.
Public Member Functions | |
| Frame () | |
| Creates a new frame. More... | |
| Frame (const Frame &other) | |
| Creates new references to an existing frame's data. More... | |
| ~Frame () | |
| Destructor. More... | |
| Frame & | operator= (const Frame &other) |
| Thread safe assignment operator. More... | |
| double | getTimeStamp () const |
| Get the time stamp (in seconds) of this frame. More... | |
| int | getIndex () const |
| Get the index of this frame. More... | |
| List< const Image > | getImages () const |
| Read-only access to the list of images in this frame. More... | |
Protected Attributes | |
| FrameData * | mData |
| Frame | ( | ) |
Creates a new frame.
| ~Frame | ( | ) |
Destructor.
| double getTimeStamp | ( | ) | const |
Get the time stamp (in seconds) of this frame.
The time stamp of a frame is the time when the image was captured, independent of when the image buffer itself was created.
The time stamp is measured in seconds, and represents the time elapsed since some reference time. The reference time is platform and device specific, but is usually either the time when the application was launched or the time the device started up.
| int getIndex | ( | ) | const |
Get the index of this frame.
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protected |
