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DSContoursUnit - Dynamsoft Core Module iOS Edition API Reference
The class DSContoursUnit of Dynamsoft Core Module represents a unit that contains contours as intermediate results.
contours unit, objective-c, swift
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DSContoursUnit

The DSContoursUnit class extends the DSIntermediateResultUnit class and represents a unit of contours, which are collections of points that define the shape of an object in an image.

Definition

Assembly: DynamsoftCore.framework

>- Objective-C >- Swift > >1. ```objc @interface DSContoursUnit: DSIntermediateResultUnit ``` 2. ```swift class ContoursUnit: IntermediateResultUnit ```

Methods

Method Description
getContours Gets the array of DSContour objects.
getHierarchies Gets the array of DSVector4 objects.
setContours Sets the contours.

Inherited Methods

The following methods are inherited from class [IntermediateResultUnit]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html).

Method Description
[getHashId]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#gethashid) Gets the hash ID of the unit. The hash ID is the unique identifier for the intermediate result unit.
[getOriginalImageHashId]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#getoriginalimagehashid) Gets the hash ID of the original image associated with this unit.
[getOriginalImageTag]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#getoriginalimagetag) Gets the tag associated with the original image.
[getType]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#gettype) Gets the type of the intermediate result unit, defined by the enumeration [IntermediateResultUnitType]({{ site.dcv_enumerations }}core/intermediate-result-unit-type.html?lang=objc,swift).
[getTransformMatrix]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#gettransformmatrix) Gets the transformation matrix via DSTransformMatrixType.
[clone]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#clone) Creates a copy of the intermediate result unit.
[replace]({{ site.dcv_ios_api }}core/intermediate-results/intermediate-result-unit.html#replace) Replaces the content of the intermediate result unit.

getContours

Get an array of DSContour objects.

>- Objective-C >- Swift > >1. ```objc -(nullable NSArray*)getContours; ``` 2. ```swift func getContours() -> [Contour]? ```

Return Value

An array of DSContour objects.

setContours

Sets the contours.

>- Objective-C >- Swift > >1. ```objc -(NSInteger)setContours:(NSArray*)contours hierarchies:(NSArray*)hierarchies matrixToOriginalImage:(CGAffineTransform)matrixToOriginalImage; ``` 2. ```swift func setContours(_ contours: [Contour]?, hierarchies: [Vector4]?, matrixToOriginalImage: CGAffineTransform) -> Int ```

Parameters

contours: An array of DSContour objects.

hierarchies: The contour hierarchies as an array of DSVector4 objects.

matrixToOriginalImage: The matrix to original image.

Return Value

Returns the ErrorCode if failed. Otherwise, returns 0.

getHierarchies

Gets the array of DSVector4 objects.

>- Objective-C >- Swift > >1. ```objc -(nullable NSArray*)getHierarchies; ``` 2. ```swift func getHierarchies() -> [Vector4]? ```

Return Value

The contour hierarchies as an array of DSVector4 objects.