All Implemented Interfaces:
```
public final class ContourDetectorFrameHandler
extends FrameHandler
                    
```
Performs contour detection on camera preview frames. Outputs results via ContourDetectorFrameHandler.ResultHandler (.addResultHandler).
Preview frame considered intercepted if at least one ContourDetectorFrameHandler.ResultHandler returns true from ContourDetectorFrameHandler.ResultHandler.handle (FrameHandlerResult)}

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public interface`	`ContourDetectorFrameHandler.ResultHandler`	Continuously notified about contour detection results.
`public abstract class`	`ContourDetectorFrameHandler.ContourDetectorResultHandler`	Successor-class needed for cross-platform implementation
`public final class`	`ContourDetectorFrameHandler.DetectedFrame`	Contour detection results alongside with information about frame

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description
`ContourDetectorFrameHandler(Context context, ContourDetector contourDetector)`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`Boolean`	`handleFrame(FrameHandler.Frame previewFrame)`	Invoked for every new camera preview frame.
`final Unit`	`addResultHandler(ContourDetectorFrameHandler.ResultHandler handler)`	Registers result handler which will be notified about contour detection results.
`final Unit`	`removeResultHandler(ContourDetectorFrameHandler.ResultHandler handler)`	Unregisters handler.
`final Unit`	`clearResultHandlers()`	Unregisters all handlers.
`final Unit`	`setAcceptedAngleScore(Double acceptedAngleScore)`	The minimum score in percent (0 - 100) of the perspective distortion to accept a detected document.
`final Unit`	`detectInFinder(Boolean enabled)`	Detect document on whole camera frame or only on finder window.
`final Unit`	`setAcceptedSizeScore(Double acceptedSizeScore)`	The minimum size in percent (0 - 100) of the screen size to accept a detected document.
`final Unit`	`setAcceptedBrightnessThreshold(Integer acceptedBrightnessThreshold)`	The minimum brightness value to accept a detected document.
`final Unit`	`setRequiredAspectRatios(List<AspectRatio> requiredPageAspectRatios)`	Set required PageAspectRatios.
`final Unit`	`setIgnoreBadAspectRatio(Boolean ignoreBadAspectRatio)`	Flag to determine whether to treat DetectionStatus.
`final static ContourDetectorFrameHandler`	`attach(IScanbotCameraView cameraView, ContourDetector detector)`	Convenience method for creating new ContourDetectorFrameHandler and adding it as FrameHandler to given camera view.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ContourDetectorFrameHandler
```
ContourDetectorFrameHandler(Context context, ContourDetector contourDetector)
```
- Method Detail
  - handleFrame
```
@Synchronized() Boolean handleFrame(FrameHandler.Frame previewFrame)
```
    Invoked for every new camera preview frame.
    
    Parameters:
    
    previewFrame - captured preview frame data
  - addResultHandler
```
 final Unit addResultHandler(ContourDetectorFrameHandler.ResultHandler handler)
```
    Registers result handler which will be notified about contour detection results.
    Results are coming on the worker thread. Don't forget to move execution to main thread before updating UI.
    
    Parameters:
    
    handler - handler to register.
  - removeResultHandler
```
 final Unit removeResultHandler(ContourDetectorFrameHandler.ResultHandler handler)
```
    Unregisters handler.
    
    Parameters:
    
    handler - handler to unregister.
  - clearResultHandlers
```
 final Unit clearResultHandlers()
```
    Unregisters all handlers.
  - setAcceptedAngleScore
```
 final Unit setAcceptedAngleScore(Double acceptedAngleScore)
```
    The minimum score in percent (0 - 100) of the perspective distortion to accept a detected document. Default is 75.0. Set lower values to accept more perspective distortion.
    Warning: Lower values result in more blurred document images.
  - detectInFinder
```
 final Unit detectInFinder(Boolean enabled)
```
    Detect document on whole camera frame or only on finder window.
    default is false
  - setAcceptedSizeScore
```
 final Unit setAcceptedSizeScore(Double acceptedSizeScore)
```
    The minimum size in percent (0 - 100) of the screen size to accept a detected document. It is sufficient that height or width match the score. Default is 80.0.
    Warning: Lower values result in low resolution document images.
  - setAcceptedBrightnessThreshold
```
 final Unit setAcceptedBrightnessThreshold(Integer acceptedBrightnessThreshold)
```
    The minimum brightness value to accept a detected document. Default is 50.
  - setRequiredAspectRatios
```
 final Unit setRequiredAspectRatios(List<AspectRatio> requiredPageAspectRatios)
```
    Set required PageAspectRatios.
  - setIgnoreBadAspectRatio
```
 final Unit setIgnoreBadAspectRatio(Boolean ignoreBadAspectRatio)
```
    Flag to determine whether to treat DetectionStatus.OK_BUT_BAD_ASPECT_RATIO status as DetectionStatus.OK. Default is false
  - attach
```
 final static ContourDetectorFrameHandler attach(IScanbotCameraView cameraView, ContourDetector detector)
```
    Convenience method for creating new ContourDetectorFrameHandler and adding it as FrameHandler to given camera view.
    
    Parameters:
    
    cameraView - camera view to which new contour detector will be attached
    
    detector - contour detector instance

Class ContourDetectorFrameHandler

Nested Class Summary

Field Summary

Constructor Summary

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ContourDetectorFrameHandler

Method Detail

handleFrame

addResultHandler

removeResultHandler

clearResultHandlers

setAcceptedAngleScore

detectInFinder

setAcceptedSizeScore

setAcceptedBrightnessThreshold

setRequiredAspectRatios

setIgnoreBadAspectRatio

attach