---
layout: default-layout
title: DSIntermediateResultReceiver - Dynamsoft Capture Vision iOS Edition API Reference
description: The protocol DSIntermediateResultReceiver includes methods for monitoring the output of intermediate results.
keywords: protocol, objective-c, swift
needGenerateH3Content: true
needAutoGenerateSidebar: true
noTitleIndex: true
ignore: true
---

# DSIntermediateResultReceiver

The IntermediateResultReceiver class is designed as a standardized way for retrieving intermediate results in image processing workflows in the Dynamsoft Capture Vision architecture.

## Definition

*Assembly:* DynamsoftCaptureVisionBundle.xcframework

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
@protocol DSIntermediateResultReceiver <NSObject>
```
2. 
```swift
protocol IntermediateResultReceiver: NSObjectProtocol
```

## Methods

| Method | Description |
| ------ | ----------- |
| [`getObservationParameters`](#getobservationparameters) | Gets the observed parameters of the intermediate result receiver. |
| [`onTargetROIResultsReceived`](#ontargetroiresultsreceived) | The callback triggered when the processing of a target-ROI is finished. |
| [`onTaskResultsReceived`](#ontaskresultsreceived) | The callback triggered when the processing of a task is finished. |
| [`onPredetectedRegionsReceived`](#onpredetectedregionsreceived) | The callback triggered when pre-detected regions are received. |
| [`onLocalizedBarcodesReceived`](#onlocalizedbarcodesreceived) | The callback triggered when localized barcodes are received. |
| [`onDecodedBarcodesReceived`](#ondecodedbarcodesreceived) | The callback triggered when decoded barcodes are received. |
| [`onLocalizedTextLinesReceived`](#onlocalizedtextlinesreceived) | The callback triggered when localized text lines are received. |
| [`onRecognizedTextLinesReceived`](#onrecognizedtextlinesreceived) | The callback triggered when recognized text lines are received. |
| [`onDetectedQuadsReceived`](#ondetectedquadsreceived) | The callback triggered when detected quads are received. |
| [`onDeskewedImagesReceived`](#ondeskewedimagesreceived) | The callback triggered when deskewed images are received. |
| [`onEnhancedImageReceived`](#onenhancedimagesreceived) | The callback triggered when enhanced images are received. |
| [`onColourImageUnitReceived`](#oncolourimageunitreceived) | The callback triggered when a colour image unit is received. |
| [`onScaledColourImageUnitReceived`](#onscaledcolourimageunitreceived) | The callback triggered when a scaled-down colour image unit is received. |
| [`onGrayscaleImageUnitReceived`](#ongrayscaleimageunitreceived) | The callback triggered when a grayscale image unit is received. |
| [`onTransformedGrayscaleImageUnitReceived`](#ontransformedgrayscaleimageunitreceived) | The callback triggered when a transformed grayscale image unit is received. |
| [`onEnhancedGrayscaleImageUnitReceived`](#onenhancedgrayscaleimageunitreceived) | The callback triggered when an enhanced grayscale image unit is received. |
| [`onBinaryImageUnitReceived`](#onbinaryimageunitreceived) | The callback triggered when a binary image unit is received. |
| [`onTextureDetectionResultUnitReceived`](#ontexturedetectionresultunitreceived) | The callback triggered when a texture detection result unit is received. |
| [`onTextureRemovedGrayscaleImageUnitReceived`](#ontextureremovedgrayscaleimageunitreceived) | The callback triggered when a texture-removed grayscale image unit is received. |
| [`onTextureRemovedBinaryImageUnitReceived`](#ontextureremovedbinaryimageunitreceived) | The callback triggered when a texture-removed binary image unit is received. |
| [`onContoursUnitReceived`](#oncontoursunitreceived) | The callback triggered when a contours unit is received. |
| [`onLineSegmentsUnitReceived`](#onlinesegmentsunitreceived) | The callback triggered when a line segments unit is received. |
| [`onTextZonesUnitReceived`](#ontextzonesunitreceived) | The callback triggered when a text zones unit is received. |
| [`onTextRemovedBinaryImageUnitReceived`](#ontextremovedbinaryimageunitreceived) | The callback triggered when a text-removed binary image unit is received. |
| [`onShortLinesUnitReceived`](#onshortlinesunitreceived) | The callback triggered when a short lines unit is received. |
| [`onLogicLinesUnitReceived`](#onlogiclinesunitreceived) | The callback triggered when a logic lines unit is received. |
| [`onLongLinesUnitReceived`](#onlonglinesunitreceived) | The callback triggered when a long lines unit is received. |
| [`onCornersUnitReceived`](#oncornersunitreceived) | The callback triggered when a corners unit is received. |
| [`onCandidateQuadEdgesUnitReceived`](#oncandidatequadedgesunitreceived) | The callback triggered when a candidate quad edges unit are detected. |
| [`onCandidateBarcodeZonesUnitReceived`](#oncandidatebarcodezonesunitreceived) | The callback triggered when a candidate barcode zones unit are detected. |
| [`onScaledBarcodeImageUnitReceived`](#onscaledbarcodeimageunitreceived) | The callback triggered when a scaled-up barcode image unit is received. |
| [`onDeformationResistedBarcodeImageUnitReceived`](#ondeformationresistedbarcodeimageunitreceived) | The callback triggered when a deformation-resisted barcode image unit is received. |
| [`onComplementedBarcodeImageUnitReceived`](#oncomplementedbarcodeimageunitreceived) | The callback triggered when a complemented barcode image unit is received. |
| [`onRawTextLinesUnitReceived`](#onrawtextlinesunitreceived) | The callback triggered when a raw text lines unit is received. |

### getObservationParameters

Get the observed parameters of the intermediate result receiver.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(DSObservationParameters *)getObservationParameters;
```
2. 
```swift
func getObservationParameters() -> ObservationParameters
```

**Return Value**

An `DSObservationParameters` object.

### onTargetROIResultsReceived

The callback triggered when the processing of a target ROI is finished.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTargetROIResultsReceived:(DSIntermediateResult *)unit
                             info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTargetROIResultsReceived(_ unit: IntermediateResult, info: IntermediateResultExtraInfo)
```

### onTaskResultsReceived

The callback triggered when the processing of a task is finished.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTaskResultsReceived:(DSIntermediateResult *)unit
                        info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTaskResultsReceived(_ unit: IntermediateResult, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result from the task, of type `IntermediateResult`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onPredetectedRegionsReceived

The callback triggered when pre-detected regions are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onPredetectedRegionsReceived:(DSPredetectedRegionsUnit *)unit
                               info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onPredetectedRegionsReceived(_ unit: PredetectedRegionsUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the pre-detected regions, of type `PredetectedRegionsUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onLocalizedBarcodesReceived

The callback triggered when localized barcodes are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onLocalizedBarcodesReceived:(DSLocalizedBarcodesUnit *)unit
                              info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onLocalizedBarcodesReceived(_ unit: LocalizedBarcodesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the localized barcodes, of type `LocalizedBarcodesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onDecodedBarcodesReceived

The callback triggered when decoded barcodes are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onDecodedBarcodesReceived:(DSDecodedBarcodesUnit *)unit
                            info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onDecodedBarcodesReceived(_ unit: DecodedBarcodesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the decoded barcodes, of type `DecodedBarcodesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onLocalizedTextLinesReceived

The callback triggered when localized text lines are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onLocalizedTextLinesReceived:(DSLocalizedTextLinesUnit *)unit
                               info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onLocalizedTextLinesReceived(_ unit: LocalizedTextLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the localized text lines, of type `DSLocalizedTextLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onRecognizedTextLinesReceived

The callback triggered when recognized text lines are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onRecognizedTextLinesReceived:(DSRecognizedTextLinesUnit *)unit
                                info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onRecognizedTextLinesReceived(_ unit: RecognizedTextLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the recognized text lines, of type `RecognizedTextLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onDetectedQuadsReceived

The callback triggered when detected quads are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onDetectedQuadsReceived:(DSDetectedQuadsUnit *)unit
                          info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onDetectedQuadsReceived(_ unit: DetectedQuadsUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the detected quads, of type `DetectedQuadsUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onDeskewedImagesReceived

The callback triggered when deskewed images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onDeskewedImagesReceived:(DSDeskewedImagesUnit *)unit
                           info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onDeskewedImagesReceived(_ unit: DeskewedImagesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the deskewed images, of type `DeskewedImagesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onEnhancedImagesReceived

The callback triggered when enhanced images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onEnhancedImagesReceived:(DSEnhancedImagesUnit *)unit
                             info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onEnhancedImagesReceived(_ unit: EnhancedImagesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the enhanced images, of type `EnhancedImagesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onColourImageUnitReceived

The callback triggered when colour images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onColourImageUnitReceived:(DSColourImageUnit *)unit
                            info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onColourImageUnitReceived(_ unit: ColourImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the colour images, of type `ColourImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onScaledColourImageUnitReceived

The callback triggered when up or down scaled colour images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onScaledColourImageUnitReceived:(DSScaledColourImageUnit *)unit
                                  info:(DSIntermediateResultExtraInfo *)info
```
1. 
```swift
func onScaledColourImageUnitReceived(_ unit: ScaledColourImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the up or down scaled colour images, of type `ScaledColourImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onGrayscaleImageUnitReceived

The callback triggered when grayscale images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onGrayscaleImageUnitReceived:(DSGrayscaleImageUnit *)unit
                               info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onGrayscaleImageUnitReceived(_ unit: GrayscaleImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the grayscale images, of type `GrayscaleImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTransformedGrayscaleImageUnitReceived

The callback triggered when transformed grayscale images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTransformedGrayscaleImageUnitReceived:(DSTransformedGrayscaleImageUnit *)unit
                                          info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTransformedGrayscaleImageUnitReceived(_ unit: TransformedGrayscaleImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the transformed grayscale images, of type `TransformedGrayscaleImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onEnhancedGrayscaleImageUnitReceived

The callback triggered when enhanced grayscale images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onEnhancedGrayscaleImageUnitReceived:(DSEnhancedGrayscaleImageUnit *)unit
                                       info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onEnhancedGrayscaleImageUnitReceived(_ unit: EnhancedGrayscaleImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the enhanced grayscale images, of type `EnhancedGrayscaleImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onBinaryImageUnitReceived

The callback triggered when binary images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onBinaryImageUnitReceived:(DSBinaryImageUnit *)unit
                            info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onBinaryImageUnitReceived(_ unit: BinaryImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the binary images, of type `BinaryImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTextureDetectionResultUnitReceived

The callback triggered when texture detection results are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTextureDetectionResultUnitReceived:(DSTextureDetectionResultUnit *)unit
                                       info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTextureDetectionResultUnitReceived(_ unit: TextureDetectionResultUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the texture detection results, of type `TextureDetectionResultUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTextureRemovedGrayscaleImageUnitReceived

The callback triggered when texture removed grayscale images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTextureRemovedGrayscaleImageUnitReceived:(DSTextureRemovedGrayscaleImageUnit *)unit
                                             info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTextureRemovedGrayscaleImageUnitReceived(_ unit: TextureRemovedGrayscaleImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the texture removed grayscale images, of type `TextureRemovedGrayscaleImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTextureRemovedBinaryImageUnitReceived

The callback triggered when texture removed binary images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTextureRemovedBinaryImageUnitReceived:(DSTextureRemovedBinaryImageUnit *)unit
                                          info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTextureRemovedBinaryImageUnitReceived(_ unit: TextureRemovedBinaryImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the texture removed binary images, of type `TextureRemovedBinaryImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onContoursUnitReceived

The callback triggered when contours are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onContoursUnitReceived:(DSContoursUnit *)unit
                         info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onContoursUnitReceived(_ unit: ContoursUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the contours, of type `ContoursUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onShortLinesUnitReceived

The callback triggered when short lines are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
- (void)onShortLinesUnitReceived:(DSShortLinesUnit*) unit
                            info:(DSIntermediateResultExtraInfo *)info;
```
2. 
```swift
func onShortLinesUnitReceived(_ unit: ShortLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the short lines, of type `DSShortLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onLineSegmentsUnitReceived

The callback triggered when line segments are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onLineSegmentsUnitReceived:(DSLineSegmentsUnit *)unit
                             info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onLineSegmentsUnitReceived(_ unit: LineSegmentsUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the line segments, of type `LineSegmentsUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTextZonesUnitReceived

The callback triggered when text zones are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTextZonesUnitReceived:(DSTextZonesUnit *)unit
                          info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTextZonesUnitReceived(_ unit: TextZonesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the text zones, of type `TextZonesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onTextRemovedBinaryImageUnitReceived

The callback triggered when text removed binary images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onTextRemovedBinaryImageUnitReceived:(DSTextRemovedBinaryImageUnit *)unit
                                       info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onTextRemovedBinaryImageUnitReceived(_ unit: TextRemovedBinaryImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the text removed binary images, of type `TextRemovedBinaryImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onLogicLinesUnitReceived

The callback triggered when logic lines are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onLogicLinesUnitReceived:(DSLogicLinesUnit *)unit
                           info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onLogicLinesUnitReceived(_ unit: LogicLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the logic lines, of type `LogicLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onLongLinesUnitReceived

The callback triggered when long lines are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onLongLinesUnitReceived:(DSLongLinesUnit *)unit
                          info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onLongLinesUnitReceived(_ unit: LongLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the long lines, of type `LongLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onCornersUnitReceived

The callback triggered when corners are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onCornersUnitReceived:(DSCornersUnit *)unit
                        info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onCornersUnitReceived(_ unit: CornersUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the corners, of type `CornersUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onCandidateQuadEdgesUnitReceived

The callback triggered when candidate quad edges are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onCandidateQuadEdgesUnitReceived:(DSCandidateQuadEdgesUnit *)unit
                                   info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onCandidateQuadEdgesUnitReceived(_ unit: CandidateQuadEdgesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the candidate quad edges, of type `CandidateQuadEdgesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onCandidateBarcodeZonesUnitReceived

The callback triggered when candidate barcode zones are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onCandidateBarcodeZonesUnitReceived:(DSCandidateBarcodeZonesUnit *)unit
                                      info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onCandidateBarcodeZonesUnitReceived(_ unit: CandidateBarcodeZonesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the candidate barcode zones, of type `CandidateBarcodeZonesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onScaledBarcodeImageUnitReceived

The callback triggered when scaled up barcode images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onScaledBarcodeImageUnitReceived:(DSScaledBarcodeImageUnit *)unit
                                   info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onScaledBarcodeImageUnitReceived(_ unit: ScaledBarcodeImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the scaled up barcode images, of type `ScaledBarcodeImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onDeformationResistedBarcodeImageUnitReceived

The callback triggered when deformation resisted barcode images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onDeformationResistedBarcodeImageUnitReceived:(DSDeformationResistedBarcodeImageUnit *)unit
                                                info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onDeformationResistedBarcodeImageUnitReceived(_ unit: DeformationResistedBarcodeImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the deformation resisted barcode images, of type `DeformationResistedBarcodeImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onComplementedBarcodeImageUnitReceived

The callback triggered when complemented barcode images are received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onComplementedBarcodeImageUnitReceived:(DSComplementedBarcodeImageUnit *)unit
                                         info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onComplementedBarcodeImageUnitReceived(_ unit: ComplementedBarcodeImageUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the complemented barcode images, of type `ComplementedBarcodeImageUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.

### onRawTextLinesUnitReceived

The callback triggered when a raw text lines unit is received.

<div class="sample-code-prefix"></div>
>- Objective-C
>- Swift
>
>1. 
```objc
-(void)onRawTextLinesUnitReceived:(DSRawTextLinesUnit *)unit
                             info:(DSIntermediateResultExtraInfo *)info
```
2. 
```swift
func onRawTextLinesUnitReceived(_ unit: RawTextLinesUnit, info: IntermediateResultExtraInfo)
```

**Parameters**

`unit`: The intermediate result that contains the raw text lines, of type `RawTextLinesUnit`.

`info`: Additional information about the result, of type `IntermediateResultExtraInfo`.