Performs object detection on images.
Signature:
export
declare
class
ObjectDetector
extends
VisionTaskRunner
Extends: VisionTaskRunner
Methods
| Method | Modifiers | Description |
|---|---|---|
static
|
Initializes the Wasm runtime and creates a new object detector based on the provided model asset buffer. | |
static
|
Initializes the Wasm runtime and creates a new object detector based on the path to the model asset. | |
static
|
Initializes the Wasm runtime and creates a new object detector from the provided options. | |
Performs object detection on the provided single image and waits synchronously for the response. Only use this method when the ObjectDetector is created with running mode image
. |
||
Performs object detection on the provided video frame and waits synchronously for the response. Only use this method when the ObjectDetector is created with running mode video
. |
||
Sets new options for the object detector.Calling setOptions()
with a subset of options only affects those options. You can reset an option back to its default value by explicitly setting it to undefined
. |
ObjectDetector.createFromModelBuffer()
Initializes the Wasm runtime and creates a new object detector based on the provided model asset buffer.
Signature:
static
createFromModelBuffer
(
wasmFileset
:
WasmFileset
,
modelAssetBuffer
:
Uint8Array
)
:
Promise<ObjectDetector>
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
wasmFileset
|
WasmFileset | A configuration object that provides the location of the Wasm binary and its loader. |
|
modelAssetBuffer
|
Uint8Array | A binary representation of the model. |
Returns:
Promise< ObjectDetector >
ObjectDetector.createFromModelPath()
Initializes the Wasm runtime and creates a new object detector based on the path to the model asset.
Signature:
static
createFromModelPath
(
wasmFileset
:
WasmFileset
,
modelAssetPath
:
string
)
:
Promise<ObjectDetector>
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
wasmFileset
|
WasmFileset | A configuration object that provides the location of the Wasm binary and its loader. |
|
modelAssetPath
|
string | The path to the model asset. |
Returns:
Promise< ObjectDetector >
ObjectDetector.createFromOptions()
Initializes the Wasm runtime and creates a new object detector from the provided options.
Signature:
static
createFromOptions
(
wasmFileset
:
WasmFileset
,
objectDetectorOptions
:
ObjectDetectorOptions
)
:
Promise<ObjectDetector>
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
wasmFileset
|
WasmFileset | A configuration object that provides the location of the Wasm binary and its loader. |
|
objectDetectorOptions
|
ObjectDetectorOptions | The options for the Object Detector. Note that either a path to the model asset or a model buffer needs to be provided (via baseOptions
). |
Returns:
Promise< ObjectDetector >
ObjectDetector.detect()
Performs object detection on the provided single image and waits synchronously for the response. Only use this method when the ObjectDetector is created with running mode image
.
Signature:
detect
(
image
:
ImageSource
,
imageProcessingOptions?
:
ImageProcessingOptions
)
:
DetectionResult
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
image
|
ImageSource | An image to process. |
|
imageProcessingOptions
|
ImageProcessingOptions | the ImageProcessingOptions
specifying how to process the input image before running inference. A result containing a list of detected objects. |
Returns:
ObjectDetector.detectForVideo()
Performs object detection on the provided video frame and waits synchronously for the response. Only use this method when the ObjectDetector is created with running mode video
.
Signature:
detectForVideo
(
videoFrame
:
ImageSource
,
timestamp
:
number
,
imageProcessingOptions?
:
ImageProcessingOptions
)
:
DetectionResult
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
videoFrame
|
ImageSource | A video frame to process. |
|
timestamp
|
number | The timestamp of the current frame, in ms. |
|
imageProcessingOptions
|
ImageProcessingOptions | the ImageProcessingOptions
specifying how to process the input image before running inference. A result containing a list of detected objects. |
Returns:
ObjectDetector.setOptions()
Sets new options for the object detector.
Calling setOptions()
with a subset of options only affects those options. You can reset an option back to its default value by explicitly setting it to undefined
.
Signature:
setOptions
(
options
:
ObjectDetectorOptions
)
:
Promise<void>
;
Parameters
| Parameter | Type | Description |
|---|---|---|
|
options
|
ObjectDetectorOptions | The options for the object detector. |
Returns:
Promise<void>
