react-native-text-detector
v0.0.6
Published
Text Detector from image for react native
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Readme
react-native-text-detector
Getting started
$ npm install react-native-text-detector --save
or yarn add react-native-text-detector
Manual installation
iOS
Attach Tesseract Languages you want to use in your app
Import your tessdata folder (you can download one for your language from Google's Repo OR if that gives an error use THIS REPO as referenced on stack overflow as solution into the root of your project AS A REFERENCED FOLDER (see below). It contains the Tesseract trained data files. You can add your own trained data files here too.
NOTE: This library currently requires the tessdata folder to be linked as a referenced folder instead of a symbolic group. If Tesseract can't find a language file in your own project, it's probably because you created the tessdata folder as a symbolic group instead of a referenced folder. It should look like this if you did it correctly:
Note how the tessdata folder has a blue icon, indicating it was imported as a referenced folder instead of a symbolic group.
Also add -lstdc++
if not already present
Using Pods (Recommended)
- Add following in
ios/Podfile
pod 'RNTextDetector', path: '../node_modules/react-native-text-detector/ios'
- Run following from project's root directory
cd ios && pod install
- Use
<your_project>.xcworkspace
to run your app
Direct Linking
- In XCode, in the project navigator, right click
Libraries
➜Add Files to [your project's name]
- Go to
node_modules
➜react-native-text-detector
and addRNTextDetector.xcodeproj
- In XCode, in the project navigator, select your project. Add
libRNTextDetector.a
to your project'sBuild Phases
➜Link Binary With Libraries
- Run your project (
Cmd+R
)<
Android
- Open up
android/app/src/main/java/[...]/MainActivity.java
- Add
import com.fetchsky.RNTextDetector.RNTextDetectorPackage;
to the imports at the top of the file - Add
new RNTextDetectorPackage()
to the list returned by thegetPackages()
method
Append the following lines to
android/settings.gradle
:include ':react-native-text-detector' project(':react-native-text-detector').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-text-detector/android')
Insert the following lines inside the dependencies block in
android/app/build.gradle
:... dependencies { implementation 'com.google.firebase:firebase-core:16.0.1' implementation 'com.google.firebase:firebase-ml-vision:17.0.0' implementation (project(':react-native-text-detector')) { exclude group: 'com.google.firebase' } } // Place this line at the end of file apply plugin: 'com.google.gms.google-services' // Work around for onesignal-gradle-plugin compatibility com.google.gms.googleservices.GoogleServicesPlugin.config.disableVersionCheck = true
Insert the following lines inside the dependencies block in
android/build.gradle
:buildscript { repositories { google() ... } dependencies { classpath 'com.android.tools.build:gradle:3.0.1' classpath 'com.google.gms:google-services:4.0.1' // google-services plugin } }
Usage
/**
*
* This Example uses react-native-camera for getting image
*
*/
import RNTextDetector from "react-native-text-detector";
export class TextDetectionComponent extends PureComponent {
...
detectText = async () => {
try {
const options = {
quality: 0.8,
base64: true,
skipProcessing: true,
};
const { uri } = await this.camera.takePictureAsync(options);
const visionResp = await RNTextDetector.detectFromUri(uri);
console.log('visionResp', visionResp);
} catch (e) {
console.warn(e);
}
};
...
}