MaskErosionPlugin
Erosion operation plugin for segmentation mask
Performs the erosion operation on a segmentation mask. Erosion is a morphological operations removing pixels on the boundaries of masked objects in an image. The value of the output pixel is minimum value of all pixels in the neighbourhood which radius is a plugin’s parameter. Plugin depends on MaskUploadPlugin that must be attached to the renderer to upload mask buffer in texture. One may utilize MaskUpscalePlugin providing higher resolution segmentation mask that significantly increases mask’s accuracy. Plugin may be combined with other mask post-processing plugins. Order in which operation on mask are applied is defined by order of plugins’ attachment.
Extends
Constructors
new MaskErosionPlugin()
new MaskErosionPlugin(
radius,size):MaskErosionPlugin
Constructor
Parameters
• radius: number = 1
Dilation operation radius
• size: Size = ...
Size of segmentation mask
Returns
Overrides
Properties
loaded
loaded:
boolean
Loaded state
Inherited from
ordinal
ordinal:
number
Ordinal number
Inherited from
radius
protectedradius:number=1
Dilation operation radius
renderer?
protectedoptionalrenderer:Renderer<SegmentationResult>
Renderer loaded the plugin
Inherited from
shader?
protectedoptionalshader:ErosionShader
Dilation shader
size
protectedsize:Size
Size of segmentation mask
Methods
dispose()
dispose():
void
Dispose video plugin
Returns
void
Inherited from
load()
load(
renderer):Promise<void>
Initialize plugin
Initializes dilation shader program.
Parameters
• renderer: Renderer<SegmentationResult>
Renderer this plugin is attached to
Returns
Promise<void>
Promise resolving when initialization is finished
Overrides
setupCamera()
setupCamera(
ratio,angle):void
Set camera parameters
Could be overridden to adjust plugin’s pipeline.
Parameters
• ratio: number
Aspect ration of input video
• angle: number
Vertical field of view in radians
Returns
void
Inherited from
setupVideo()
setupVideo(
size):void
Set video size
Could be overridden to adjust plugin’s pipeline.
Parameters
• size: Size
Resolution of input video
Returns
void
Inherited from
unload()
unload():
void
Reset plugin
Releases all resources initialized in load().
Returns
void
Overrides
update()
update(
result,stream):Promise<void>
Update segmentation masks
Updates segmentation mask applying dilation operation.
Replaces maskTex of tracks with the updated mask.
Parameters
• result: SegmentationResult
Results of video processing
• stream: HTMLCanvasElement
Captured video frame
Returns
Promise<void>