ImageTracker Class¶
Description¶
ImageTracker实现了平面卡片的检测和跟踪。
ImageTracker占用(1 + SimultaneousNum)个camera的buffer。应使用camera的setBufferCapacity设置不少于所有组件占用的camera的buffer数量。参考 概览 _ 。
创建之后，可以调用start/stop来开始和停止运行，start/stop是非常轻量的调用。
当不再需要该组件时，可以调用close对其进行关闭。close之后不应继续使用。
ImageTracker通过feedbackFrameSink输入 FeedbackFrame ，应将 FeedbackFrameSource 连接到feedbackFrameSink上进行使用。参考 概览 _ 。
在 Target 可以被ImageTracker跟踪之前，你需要通过loadTarget/unloadTarget将它载入。可以通过传入接口的回调来获取load/unload的结果。
isAvailable¶
返回true。
- C
bool easyar_ImageTracker_isAvailable(void)
- C++17
static bool isAvailable()
- C++03
static bool isAvailable()
- Java
public static boolean isAvailable()
- Kotlin
companion object fun isAvailable(): Boolean
- Objective-C
+ (bool)isAvailable
- Swift
public static func isAvailable() -> Bool
- C#
public static bool isAvailable()
feedbackFrameSink¶
FeedbackFrame 输入端口。 FeedbackFrame 中的 InputFrame 成员要求必须拥有图像、时间戳和camera参数。
- C
void easyar_ImageTracker_feedbackFrameSink(easyar_ImageTracker * This, easyar_FeedbackFrameSink * * Return)
- C++17
std::shared_ptr<FeedbackFrameSink> feedbackFrameSink()
- C++03
void feedbackFrameSink(FeedbackFrameSink * * Return)
- Java
public @Nonnull FeedbackFrameSink feedbackFrameSink()
- Kotlin
fun feedbackFrameSink(): FeedbackFrameSink
- Objective-C
- (easyar_FeedbackFrameSink *)feedbackFrameSink
- Swift
public func feedbackFrameSink() -> FeedbackFrameSink
- C#
public virtual FeedbackFrameSink feedbackFrameSink()
bufferRequirement¶
当前组件占用camera buffer的数量。
- C
int easyar_ImageTracker_bufferRequirement(easyar_ImageTracker * This)
- C++17
int bufferRequirement()
- C++03
int bufferRequirement()
- Java
public int bufferRequirement()
- Kotlin
fun bufferRequirement(): Int
- Objective-C
- (int)bufferRequirement
- Swift
public func bufferRequirement() -> Int32
- C#
public virtual int bufferRequirement()
outputFrameSource¶
OutputFrame 输出端口。
- C
void easyar_ImageTracker_outputFrameSource(easyar_ImageTracker * This, easyar_OutputFrameSource * * Return)
- C++17
std::shared_ptr<OutputFrameSource> outputFrameSource()
- C++03
void outputFrameSource(OutputFrameSource * * Return)
- Java
public @Nonnull OutputFrameSource outputFrameSource()
- Kotlin
fun outputFrameSource(): OutputFrameSource
- Objective-C
- (easyar_OutputFrameSource *)outputFrameSource
- Swift
public func outputFrameSource() -> OutputFrameSource
- C#
public virtual OutputFrameSource outputFrameSource()
create¶
创建。默认的跟踪模式是 ImageTrackerMode.PreferQuality 。
- C
void easyar_ImageTracker_create(easyar_ImageTracker * * Return)
- C++17
static std::shared_ptr<ImageTracker> create()
- C++03
static void create(ImageTracker * * Return)
- Java
public static @Nonnull ImageTracker create()
- Kotlin
companion object fun create(): ImageTracker
- Objective-C
+ (easyar_ImageTracker *)create
- Swift
public static func create() -> ImageTracker
- C#
public static ImageTracker create()
createWithMode¶
以特定跟踪模式创建。在低端手机上，可以使用 ImageTrackerMode.PreferPerformance 来获得更好的性能，但是跟踪效果会有些许损失。
- C
void easyar_ImageTracker_createWithMode(easyar_ImageTrackerMode trackMode, easyar_ImageTracker * * Return)
- C++17
static std::shared_ptr<ImageTracker> createWithMode(ImageTrackerMode trackMode)
- C++03
static void createWithMode(ImageTrackerMode trackMode, ImageTracker * * Return)
- Java
public static @Nonnull ImageTracker createWithMode(int trackMode)
- Kotlin
companion object fun createWithMode(trackMode: Int): ImageTracker
- Objective-C
+ (easyar_ImageTracker *)createWithMode:(easyar_ImageTrackerMode)trackMode
- Swift
public static func createWithMode(_ trackMode: ImageTrackerMode) -> ImageTracker
- C#
public static ImageTracker createWithMode(ImageTrackerMode trackMode)
start¶
开始跟踪算法。
- C
bool easyar_ImageTracker_start(easyar_ImageTracker * This)
- C++17
bool start()
- C++03
bool start()
- Java
public boolean start()
- Kotlin
fun start(): Boolean
- Objective-C
- (bool)start
- Swift
public func start() -> Bool
- C#
public virtual bool start()
stop¶
暂停跟踪算法。调用start来重新启动跟踪。
- C
void easyar_ImageTracker_stop(easyar_ImageTracker * This)
- C++17
void stop()
- C++03
void stop()
- Java
public void stop()
- Kotlin
fun stop(): Unit
- Objective-C
- (void)stop
- Swift
public func stop() -> Void
- C#
public virtual void stop()
close¶
关闭。close之后不应继续使用。
- C
void easyar_ImageTracker_close(easyar_ImageTracker * This)
- C++17
void close()
- C++03
void close()
- Java
public void close()
- Kotlin
fun close(): Unit
- Objective-C
- (void)close
- Swift
public func close() -> Void
- C#
public virtual void close()
loadTarget¶
加载一个 Target 进入tracker。 Target 只有在成功加载进入tracker之后才能被识别和跟踪。
这个方法是异步方法。加载过程可能会需要一些时间来完成，这段时间内新的和丢失的target的检测可能会花比平时更多的时间，但是检测到之后的跟踪不受影响。如果你希望知道加载的结果，需要处理callback数据。callback将会在 CallbackScheduler 所指定的线程上被调用。跟踪线程和除了其它加载/卸载之外的操作都不会被阻塞。
- C
void easyar_ImageTracker_loadTarget(easyar_ImageTracker * This, easyar_Target * target, easyar_CallbackScheduler * callbackScheduler, easyar_FunctorOfVoidFromTargetAndBool callback)
- C++17
void loadTarget(std::shared_ptr<Target> target, std::shared_ptr<CallbackScheduler> callbackScheduler, std::function<void(std::shared_ptr<Target>, bool)> callback)
- C++03
void loadTarget(Target * target, CallbackScheduler * callbackScheduler, FunctorOfVoidFromTargetAndBool callback)
- Java
public void loadTarget(@Nonnull Target target, @Nonnull CallbackScheduler callbackScheduler, @Nonnull FunctorOfVoidFromTargetAndBool callback)
- Kotlin
fun loadTarget(target: Target, callbackScheduler: CallbackScheduler, callback: FunctorOfVoidFromTargetAndBool): Unit
- Objective-C
- (void)loadTarget:(easyar_Target *)target callbackScheduler:(easyar_CallbackScheduler *)callbackScheduler callback:(void (^)(easyar_Target * target, bool status))callback
- Swift
public func loadTarget(_ target: Target, _ callbackScheduler: CallbackScheduler, _ callback: @escaping (Target, Bool) -> Void) -> Void
- C#
public virtual void loadTarget(Target target, CallbackScheduler callbackScheduler, Action<Target, bool> callback)
unloadTarget¶
从tracker中卸载 Target 。
这个方法是异步方法。卸载过程可能会需要一些时间来完成，这段时间内新的和丢失的target的检测可能会花比平时更多的时间，但是检测到之后的跟踪不受影响。如果你希望知道卸载的结果，需要处理callback数据。callback将会在 CallbackScheduler 所指定的线程上被调用。跟踪线程和除了其它加载/卸载之外的操作都不会被阻塞。
- C
void easyar_ImageTracker_unloadTarget(easyar_ImageTracker * This, easyar_Target * target, easyar_CallbackScheduler * callbackScheduler, easyar_FunctorOfVoidFromTargetAndBool callback)
- C++17
void unloadTarget(std::shared_ptr<Target> target, std::shared_ptr<CallbackScheduler> callbackScheduler, std::function<void(std::shared_ptr<Target>, bool)> callback)
- C++03
void unloadTarget(Target * target, CallbackScheduler * callbackScheduler, FunctorOfVoidFromTargetAndBool callback)
- Java
public void unloadTarget(@Nonnull Target target, @Nonnull CallbackScheduler callbackScheduler, @Nonnull FunctorOfVoidFromTargetAndBool callback)
- Kotlin
fun unloadTarget(target: Target, callbackScheduler: CallbackScheduler, callback: FunctorOfVoidFromTargetAndBool): Unit
- Objective-C
- (void)unloadTarget:(easyar_Target *)target callbackScheduler:(easyar_CallbackScheduler *)callbackScheduler callback:(void (^)(easyar_Target * target, bool status))callback
- Swift
public func unloadTarget(_ target: Target, _ callbackScheduler: CallbackScheduler, _ callback: @escaping (Target, Bool) -> Void) -> Void
- C#
public virtual void unloadTarget(Target target, CallbackScheduler callbackScheduler, Action<Target, bool> callback)
targets¶
返回当前已经被加载进入tracker的target。如果异步的加载/卸载正在执行，在加载/卸载完成之前的返回值将不会反映这些加载/卸载的结果。
- C
void easyar_ImageTracker_targets(const easyar_ImageTracker * This, easyar_ListOfTarget * * Return)
- C++17
std::vector<std::shared_ptr<Target>> targets()
- C++03
void targets(ListOfTarget * * Return)
- Java
public java.util.@Nonnull ArrayList<@Nonnull Target> targets()
- Kotlin
fun targets(): ArrayList<Target>
- Objective-C
- (NSArray<easyar_Target *> *)targets
- Swift
public func targets() -> [Target]
- C#
public virtual List<Target> targets()
setSimultaneousNum¶
设置最大可被tracker跟踪的目标个数。默认值为1。
- C
bool easyar_ImageTracker_setSimultaneousNum(easyar_ImageTracker * This, int num)
- C++17
bool setSimultaneousNum(int num)
- C++03
bool setSimultaneousNum(int num)
- Java
public boolean setSimultaneousNum(int num)
- Kotlin
fun setSimultaneousNum(num: Int): Boolean
- Objective-C
- (bool)setSimultaneousNum:(int)num
- Swift
public func setSimultaneousNum(_ num: Int32) -> Bool
- C#
public virtual bool setSimultaneousNum(int num)
simultaneousNum¶
获取最大可被tracker跟踪的目标个数。默认值为1。
- C
int easyar_ImageTracker_simultaneousNum(const easyar_ImageTracker * This)
- C++17
int simultaneousNum()
- C++03
int simultaneousNum()
- Java
public int simultaneousNum()
- Kotlin
fun simultaneousNum(): Int
- Objective-C
- (int)simultaneousNum
- Swift
public func simultaneousNum() -> Int32
- C#
public virtual int simultaneousNum()