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RecognizeTextLinesWithCameraEnhancer
This sample illustrates how to recognize text lines from the video streaming. In this sample, you can read how to use DynamsoftCameraEnhancer
to capture the video streaming.
View the sample code
- RecognizeTextLineWithCameraEnahcner Sample (Java)
- RecognizeTextLineWithCameraEnahcner Sample (Kotlin)
There are some basic concepts that are helpful on understanding the SDK.
CaptureVisionRouter
CaptureVisionRouter
is a router that responsible for retrieving images from the source, coordinating the image processing tasks and dispatching the processing results. To implement a text line recognizing task, what you have to do are:
- Set a standard input for your
CaptureVisionRouter
instance. - Set a result receiver via your
CaptureVisionRouter
instance. - Tell your
CaptureVisionRouter
instance to start working and specify a text line recognizing template with its name. - (Additional) Configure the image processing Parameters to optimize the text line recognizing performance.
Standard Input
Use the setInput
method of the CaptureVisionRouter
to bind an ImageSourceAdapter
(ISA) instance is the simplest way to access to the standard input. CameraEnhancer
is one of the official implementation of the ISA for you to quickly set up the mobile camera as the image source.
Output
To get the output result, you have to implement the CapturedResultReceiver
and bind it with your CaptureVisionRouter
instance. You will receive the text line recognizing results in the onDecodedBarcodesReceived
method each time when a image (video frame) is processed.
Control the Start & Stop of the Capturing
If only one text line recognizing result is required in one scan, you can stop the text line recognizing thread via stopCapturing
method. You can call the startCapturing
at any time when you want to restart the text line recognizing.
- Java
- Kotlin
@Override public void onRecognizedTextLinesReceived(RecognizedTextLinesResult result) { if (result != null && result.getItems() != null && result.getItems().length > 0){ runOnUiThread(() -> mRouter.stopCapturing()); } }
override fun onRecognizedTextLinesReceived(result: RecognizedTextLinesResult) { if (result?.items != null && result.items.isNotEmpty()) { runOnUiThread { mRouter.stopCapturing() } } }