apple.vision

Class VNContour

java.lang.Object

org.moe.natj.general.NativeObject

org.moe.natj.objc.ObjCObject

apple.NSObject

apple.vision.VNContour

All Implemented Interfaces:

NSCopying, NSObject, VNRequestRevisionProviding

public class VNContour
extends NSObject
implements NSCopying, VNRequestRevisionProviding

The VNContour class describes a contour provided by a VNContoursObservation.

VNContour objects are lightweight objects that act as a façade which allows access to a small slice of the usually much larger block of data owned by a VNContoursObservation that represents all of the contours detected in an image. While the interface does present the notion of a hierarchy of parent/child contours, the implementation purposefully does not contain any explicit internal bookkeeping for this relationship. Instead, contours are uniquely identified via their indexPath property. As a side effect of this choice, repeated calls to methods that would return relational contours (e.g., -childContours or -childContourAtIndex:error:) are NOT guaranteed to return the same VNContour instances over and over again. If this kind of parent/child object stability is an absolute requirement of the client, then they are responsible for creating the necessary data structures to represent and build that instance-stable hierarchy.

Nested Class Summary

Nested classes/interfaces inherited from class apple.NSObject

NSObject.Function_instanceMethodForSelector_ret, NSObject.Function_methodForSelector_ret

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VNContour(org.moe.natj.general.Pointer peer)

Method Summary

Modifier and Type	Method and Description
static boolean	accessInstanceVariablesDirectly()
static VNContour	alloc()
static VNContour	allocWithZone(org.moe.natj.general.ptr.VoidPtr zone)
float	aspectRatio() The aspect ratio of the contour from the original image aspect ration expressed as width/height
static boolean	automaticallyNotifiesObserversForKey(java.lang.String key)
static void	cancelPreviousPerformRequestsWithTarget(java.lang.Object aTarget)
static void	cancelPreviousPerformRequestsWithTargetSelectorObject(java.lang.Object aTarget, org.moe.natj.objc.SEL aSelector, java.lang.Object anArgument)
VNContour	childContourAtIndexError(long childContourIndex, org.moe.natj.general.ptr.Ptr<NSError> error) Returns a VNContour object that is a child of this VNContour at the specified index.
long	childContourCount() The total number of child contours in the target contour.
NSArray<? extends VNContour>	childContours() The array of the contours enclosed by the target contour.
static NSArray<java.lang.String>	classFallbacksForKeyedArchiver()
static org.moe.natj.objc.Class	classForKeyedUnarchiver()
java.lang.Object	copyWithZone(org.moe.natj.general.ptr.VoidPtr zone)
static java.lang.String	debugDescription_static()
static java.lang.String	description_static()
static long	hash_static()
NSIndexPath	indexPath() The path to the target VNContour as it is stored in the owning VNContoursObservation's hierarchy of contours.
VNContour	init()
static NSObject.Function_instanceMethodForSelector_ret	instanceMethodForSelector(org.moe.natj.objc.SEL aSelector)
static NSMethodSignature	instanceMethodSignatureForSelector(org.moe.natj.objc.SEL aSelector)
static boolean	instancesRespondToSelector(org.moe.natj.objc.SEL aSelector)
static boolean	isSubclassOfClass(org.moe.natj.objc.Class aClass)
static NSSet<java.lang.String>	keyPathsForValuesAffectingValueForKey(java.lang.String key)
static VNContour	new_objc()
CGPathRef	normalizedPath() The contour represented as a CGPath in normalized coordinates.
long	pointCount() The number of points that describe the contour.
VNContour	polygonApproximationWithEpsilonError(float epsilon, org.moe.natj.general.ptr.Ptr<NSError> error) Simplifies the contour's collection of points into a polygon using the Ramer Douglas Peucker Algorithm.
long	requestRevision() The revision of the VNRequest subclass that was used to generate the object that implements this protocol.
static boolean	resolveClassMethod(org.moe.natj.objc.SEL sel)
static boolean	resolveInstanceMethod(org.moe.natj.objc.SEL sel)
static void	setVersion_static(long aVersion)
static org.moe.natj.objc.Class	superclass_static()
static long	version_static()

Methods inherited from class apple.NSObject

accessibilityActivate, accessibilityActivationPoint, accessibilityAssistiveTechnologyFocusedIdentifiers, accessibilityAttributedHint, accessibilityAttributedLabel, accessibilityAttributedUserInputLabels, accessibilityAttributedValue, accessibilityContainerType, accessibilityCustomActions, accessibilityCustomRotors, accessibilityDecrement, accessibilityDragSourceDescriptors, accessibilityDropPointDescriptors, accessibilityElementAtIndex, accessibilityElementCount, accessibilityElementDidBecomeFocused, accessibilityElementDidLoseFocus, accessibilityElementIsFocused, accessibilityElements, accessibilityElementsHidden, accessibilityFrame, accessibilityHint, accessibilityIncrement, accessibilityLabel, accessibilityLanguage, accessibilityNavigationStyle, accessibilityPath, accessibilityPerformEscape, accessibilityPerformMagicTap, accessibilityRespondsToUserInteraction, accessibilityScroll, accessibilityTextualContext, accessibilityTraits, accessibilityUserInputLabels, accessibilityValue, accessibilityViewIsModal, addObserverForKeyPathOptionsContext, attemptRecoveryFromErrorOptionIndex, attemptRecoveryFromErrorOptionIndexDelegateDidRecoverSelectorContextInfo, autoContentAccessingProxy, awakeAfterUsingCoder, awakeFromNib, class_objc, classForCoder, classForKeyedArchiver, copy, dealloc, debugDescription, description, dictionaryWithValuesForKeys, didChangeValueForKey, didChangeValueForKeyWithSetMutationUsingObjects, didChangeValuesAtIndexesForKey, doesNotRecognizeSelector, fileManagerShouldProceedAfterError, fileManagerWillProcessPath, finalize_objc, forwardingTargetForSelector, forwardInvocation, hash, indexOfAccessibilityElement, isAccessibilityElement, isEqual, isKindOfClass, isMemberOfClass, isProxy, methodForSelector, methodSignatureForSelector, mutableArrayValueForKey, mutableArrayValueForKeyPath, mutableCopy, mutableOrderedSetValueForKey, mutableOrderedSetValueForKeyPath, mutableSetValueForKey, mutableSetValueForKeyPath, observationInfo, observeValueForKeyPathOfObjectChangeContext, performSelector, performSelectorInBackgroundWithObject, performSelectorOnMainThreadWithObjectWaitUntilDone, performSelectorOnMainThreadWithObjectWaitUntilDoneModes, performSelectorOnThreadWithObjectWaitUntilDone, performSelectorOnThreadWithObjectWaitUntilDoneModes, performSelectorWithObject, performSelectorWithObjectAfterDelay, performSelectorWithObjectAfterDelayInModes, performSelectorWithObjectWithObject, prepareForInterfaceBuilder, provideImageDataBytesPerRowOrigin_Size_UserInfo, removeObserverForKeyPath, removeObserverForKeyPathContext, replacementObjectForCoder, replacementObjectForKeyedArchiver, respondsToSelector, self, setAccessibilityActivationPoint, setAccessibilityAttributedHint, setAccessibilityAttributedLabel, setAccessibilityAttributedUserInputLabels, setAccessibilityAttributedValue, setAccessibilityContainerType, setAccessibilityCustomActions, setAccessibilityCustomRotors, setAccessibilityDragSourceDescriptors, setAccessibilityDropPointDescriptors, setAccessibilityElements, setAccessibilityElementsHidden, setAccessibilityFrame, setAccessibilityHint, setAccessibilityLabel, setAccessibilityLanguage, setAccessibilityNavigationStyle, setAccessibilityPath, setAccessibilityRespondsToUserInteraction, setAccessibilityTextualContext, setAccessibilityTraits, setAccessibilityUserInputLabels, setAccessibilityValue, setAccessibilityViewIsModal, setIsAccessibilityElement, setNilValueForKey, setObservationInfo, setShouldGroupAccessibilityChildren, setValueForKey, setValueForKeyPath, setValueForUndefinedKey, setValuesForKeysWithDictionary, shouldGroupAccessibilityChildren, superclass, validateValueForKeyError, validateValueForKeyPathError, valueForKey, valueForKeyPath, valueForUndefinedKey, willChangeValueForKey, willChangeValueForKeyWithSetMutationUsingObjects, willChangeValuesAtIndexesForKey

Methods inherited from class org.moe.natj.objc.ObjCObject

equals, toString

Methods inherited from class org.moe.natj.general.NativeObject

finalize, getPeer, getPeerPointer

Methods inherited from class java.lang.Object

clone, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

VNContour

protected VNContour(org.moe.natj.general.Pointer peer)

Method Detail

accessInstanceVariablesDirectly

public static boolean accessInstanceVariablesDirectly()

alloc

public static VNContour alloc()

allocWithZone

public static VNContour allocWithZone(org.moe.natj.general.ptr.VoidPtr zone)

aspectRatio

public float aspectRatio()

The aspect ratio of the contour from the original image aspect ration expressed as width/height

automaticallyNotifiesObserversForKey

public static boolean automaticallyNotifiesObserversForKey(java.lang.String key)

cancelPreviousPerformRequestsWithTarget

public static void cancelPreviousPerformRequestsWithTarget(java.lang.Object aTarget)

cancelPreviousPerformRequestsWithTargetSelectorObject

public static void cancelPreviousPerformRequestsWithTargetSelectorObject(java.lang.Object aTarget,
                                                                         org.moe.natj.objc.SEL aSelector,
                                                                         java.lang.Object anArgument)

childContourAtIndexError

public VNContour childContourAtIndexError(long childContourIndex,
                                          org.moe.natj.general.ptr.Ptr<NSError> error)

Returns a VNContour object that is a child of this VNContour at the specified index.

Parameters:

childContourIndex - The index into the childContours array.

error - The error returned if the child contour cannot be provided.

Returns:

The VNContour object at the spefiied index path, or nil of a failure occurs.

childContourCount

public long childContourCount()

The total number of child contours in the target contour.

The use of this property is prefered over childContours.count due to the cost of building the child objects.

childContours

public NSArray<? extends VNContour> childContours()

The array of the contours enclosed by the target contour.

This property may come with the cost of instantiating new VNContour objects; therefore, clients are strongly encouraged to hold the results in a local variable instead of repeatedly invoking it.

classFallbacksForKeyedArchiver

public static NSArray<java.lang.String> classFallbacksForKeyedArchiver()

classForKeyedUnarchiver

public static org.moe.natj.objc.Class classForKeyedUnarchiver()

copyWithZone

public java.lang.Object copyWithZone(org.moe.natj.general.ptr.VoidPtr zone)

Specified by:

copyWithZone in interface NSCopying

debugDescription_static

public static java.lang.String debugDescription_static()

description_static

public static java.lang.String description_static()

hash_static

public static long hash_static()

indexPath

public NSIndexPath indexPath()

The path to the target VNContour as it is stored in the owning VNContoursObservation's hierarchy of contours.

init

public VNContour init()

Overrides:

init in class NSObject

instanceMethodForSelector

public static NSObject.Function_instanceMethodForSelector_ret instanceMethodForSelector(org.moe.natj.objc.SEL aSelector)

instanceMethodSignatureForSelector

public static NSMethodSignature instanceMethodSignatureForSelector(org.moe.natj.objc.SEL aSelector)

instancesRespondToSelector

public static boolean instancesRespondToSelector(org.moe.natj.objc.SEL aSelector)

isSubclassOfClass

public static boolean isSubclassOfClass(org.moe.natj.objc.Class aClass)

keyPathsForValuesAffectingValueForKey

public static NSSet<java.lang.String> keyPathsForValuesAffectingValueForKey(java.lang.String key)

new_objc

public static VNContour new_objc()

normalizedPath

public CGPathRef normalizedPath()

The contour represented as a CGPath in normalized coordinates.

The path is owned by this object and therefore will be alive as long as the the observation is alive.

pointCount

public long pointCount()

The number of points that describe the contour.

polygonApproximationWithEpsilonError

public VNContour polygonApproximationWithEpsilonError(float epsilon,
                                                      org.moe.natj.general.ptr.Ptr<NSError> error)

Simplifies the contour's collection of points into a polygon using the Ramer Douglas Peucker Algorithm.

See

Parameters:

epsilon - Points that have a perpendicular distance to the line segment they are on that greather than epsilon are kept, others are eliminated.

error - The error returned if a simplified contour cannot be created.

Returns:

A new VNContour object with a simplified polygon consisting of a subset of the points that defined the original VNContour.

requestRevision

public long requestRevision()

Description copied from interface: VNRequestRevisionProviding

The revision of the VNRequest subclass that was used to generate the object that implements this protocol.

Specified by:

requestRevision in interface VNRequestRevisionProviding

resolveClassMethod

public static boolean resolveClassMethod(org.moe.natj.objc.SEL sel)

resolveInstanceMethod

public static boolean resolveInstanceMethod(org.moe.natj.objc.SEL sel)

setVersion_static

public static void setVersion_static(long aVersion)

superclass_static

public static org.moe.natj.objc.Class superclass_static()

version_static

public static long version_static()