ImageDrawer

The class ImageDrawer is a utility class for drawing graphics on images.

Definition

Assembly: DynamsoftCaptureVisionBundle.xcframework

Objective-C
Swift

```
@interface DSImageDrawer : NSObject
```
```
class ImageDrawer : NSObject
```

Methods

Method	Description
`drawOnImage(image,quads,colour,thickness)`	Add quadrilaterals on the image.
`drawOnImage(image,lines,colour,thickness)`	Add lines on the image.
`drawOnImage(image,contours,colour,thickness)`	Add contours on the image.
`drawOnImage(image,corners,colour,thickness)`	Add corners on the image.
`drawOnImage(image,edges,colour,thickness)`	Add edges on the image.

drawOnImage(image,quads,colour,thickness)

Add quadrilaterals on the image.

Objective-C
Swift

- (DSImageData *)drawOnImage:(DSImageData *)image
                   quads:(NSArray<DSQuadrilateral *> *)quads
                  colour:(UIColor *)colour
               thickness:(NSInteger)thickness;

func drawOnImage(_ image: ImageData, quads: [Quadrilateral], colour: UIColor, thickness: Int) -> ImageData

Parameters

image: The ImageData to modify.

quads: An array of Quadrilateral objects to be added on the image.

colour: A UIColor that specifies the targeting colour.

thickness: The width of the border.

Return Value

The modified ImageData.

drawOnImage(image,lineSegments,colour,thickness)

Add lines on the image.

Objective-C
Swift

- (DSImageData *)drawOnImage:(DSImageData *)image
            lineSegments:(NSArray<DSLineSegment *> *)lineSegments
                  colour:(UIColor *)colour
               thickness:(NSInteger)thickness;

func drawOnImage(_ image: ImageData, lineSegments: [LineSegment], colour: UIColor, thickness: Int) -> ImageData

Parameters

image: The ImageData to modify.

lineSegments: An array of LineSegment objects to be added on the image.

colour: A UIColor that specifies the targeting colour.

thickness: The width of the lines.

Return Value

The modified ImageData.

drawOnImage(image,contours,colour,thickness)

Add contours on the image.

Objective-C
Swift

- (DSImageData *)drawOnImage:(DSImageData *)image
                contours:(NSArray<DSContour *> *)contours
                  colour:(UIColor *)colour
               thickness:(NSInteger)thickness;

func drawOnImage(_ image: ImageData, contours: [Contour], colour: UIColor, thickness: Int) -> ImageData

Parameters

image: The ImageData to modify.

contours: An array of Contour objects to be added on the image.

colour: A UIColor that specifies the targeting colour.

thickness: The width of the borders.

Return Value

The modified ImageData.

drawOnImage(image,corners,colour,thickness)

Add corners on the image.

Objective-C
Swift

- (DSImageData *)drawOnImage:(DSImageData *)image
                 corners:(NSArray<DSCorner *> *)corners
                  colour:(UIColor *)colour
               thickness:(NSInteger)thickness;

func drawOnImage(_ image: ImageData, corners: [Corner], colour: UIColor, thickness: Int) -> ImageData

Parameters

image: The ImageData to modify.

corners: An array of Corner objects to be added on the image.

colour: A UIColor that specifies the targeting colour.

thickness: The width of the lines.

Return Value

The modified ImageData.

drawOnImage(image,edges,colour,thickness)

Add edges on the image.

Objective-C
Swift

- (DSImageData *)drawOnImage:(DSImageData *)image
                   edges:(NSArray<DSEdge *> *)edges
                  colour:(UIColor *)colour
               thickness:(NSInteger)thickness;

func drawOnImage(_ image: ImageData, edges: [Edge], colour: UIColor, thickness: Int) -> ImageData

Parameters

image: The ImageData to modify.
edges: An array of DSEdge objects to be added on the image.
colour: A UIColor that specifies the targeting colour.
thickness: The width of the lines.

Return Value

The modified ImageData.