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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| import 'package:flutter/material.dart'; | ||
| import 'package:camera/camera.dart'; | ||
| import 'package:firebase_ml_vision/firebase_ml_vision.dart'; | ||
| import 'dart:typed_data'; | ||
| import 'package:flutter/foundation.dart'; | ||
|
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| class OcrManager { | ||
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| static Future<bool> scanText(CameraImage availableImage) async { | ||
|
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| print("scanning!..."); | ||
|
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| /* | ||
| * https://firebase.google.com/docs/ml-kit/android/recognize-text | ||
| * .setWidth(480) // 480x360 is typically sufficient for | ||
| * .setHeight(360) // image recognition | ||
| */ | ||
|
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| final FirebaseVisionImageMetadata metadata = FirebaseVisionImageMetadata( | ||
| rawFormat: availableImage.format.raw, | ||
| size: Size(availableImage.width.toDouble(),availableImage.height.toDouble()), | ||
| planeData: availableImage.planes.map((currentPlane) => FirebaseVisionImagePlaneMetadata( | ||
| bytesPerRow: currentPlane.bytesPerRow, | ||
| height: currentPlane.height, | ||
| width: currentPlane.width | ||
| )).toList(), | ||
| rotation: ImageRotation.rotation90 | ||
| ); | ||
|
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| final FirebaseVisionImage visionImage = FirebaseVisionImage.fromBytes(availableImage.planes[0].bytes, metadata); | ||
| final TextRecognizer textRecognizer = FirebaseVision.instance.textRecognizer(); | ||
| final VisionText visionText = await textRecognizer.processImage(visionImage); | ||
|
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| print("--------------------visionText:${visionText.text}"); | ||
| for (TextBlock block in visionText.blocks) { | ||
| // final Rectangle<int> boundingBox = block.boundingBox; | ||
| // final List<Point<int>> cornerPoints = block.cornerPoints; | ||
| print(block.text); | ||
| //final List<RecognizedLanguage> languages = block.recognizedLanguages; | ||
|
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| for (TextLine line in block.lines) { | ||
| // Same getters as TextBlock | ||
| print(line.text); | ||
| for (TextElement element in line.elements) { | ||
| // Same getters as TextBlock | ||
| print(element.text); | ||
| } | ||
| } | ||
| } | ||
|
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| return false; | ||
| } | ||
|
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| /* | ||
| * code by | ||
| * https://github.com/bparrishMines/mlkit_demo/blob/master/lib/main.dart | ||
| */ | ||
|
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| Uint8List concatenatePlanes(List<Plane> planes) { | ||
| final WriteBuffer allBytes = WriteBuffer(); | ||
| planes.forEach((Plane plane) => allBytes.putUint8List(plane.bytes)); | ||
| return allBytes.done().buffer.asUint8List(); | ||
| } | ||
|
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| FirebaseVisionImageMetadata buildMetaData(CameraImage image) { | ||
| return FirebaseVisionImageMetadata( | ||
| rawFormat: image.format.raw, | ||
| size: Size(image.width.toDouble(), image.height.toDouble()), | ||
| rotation: ImageRotation.rotation270, | ||
| planeData: image.planes.map((Plane plane) { | ||
| return FirebaseVisionImagePlaneMetadata( | ||
| bytesPerRow: plane.bytesPerRow, | ||
| height: plane.height, | ||
| width: plane.width, | ||
| ); | ||
| }).toList(), | ||
| ); | ||
| } | ||
| } |