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node-native-ocr
Advanced tools
The native Node.js bindings to the Tesseract OCR project using N-API and node-addon-api.
Benefits:
tesseract
command line.buffer
s.Contributions are welcome.
First of all, a g++ 4.9 compiler is required.
Before install node-native-ocr
, the following dependencies should be installed
$ brew install pkg-config tesseract # mac os
Then npm install
$ npm install node-native-ocr
I have not found a way to get tesseract working in a bundled electron installer yet. This is work in progress....
If you want to use node-native-ocr
with electron, use electron-rebuild, which takes care of compiling node-native-cor
with the node version of your electron installation.
import {
recognize
} from 'node-native-ocr'
import fs from 'fs-extra'
const filepath = path.join(__dirname, 'test', 'fixtures', 'node-native-ocr.jpg')
fs.readFile(filepath).then(recognize).then(console.log) // 'node-native-ocr'
Buffer
the content buffer of the image file.node-native-ocrOptions=
optionalReturns Promise.<String>
the recognized text if succeeded.
node-native-ocrOptions
Object
{
// @type `(String|Array.<String>)=eng`,
//
// Specifies language(s) used for OCR.
// Run `tesseract --list-langs` in command line for all supported languages.
// Defaults to `'eng'`.
//
// To specify multiple languages, use an array.
// English and Simplified Chinese, for example:
// ```
// lang: ['eng', 'chi_sim']
// ```
lang: 'eng'
}
Promise.reject(error)
Error
The JavaScript Error
instance
String
Error code.String
Error message.Error
.ERR_READ_IMAGE
Rejects if it fails to read image data from file or buffer.
ERR_INIT_TESSER
Rejects if tesseract fails to initialize
// For details of `mainWindow: BrowserWindow`, see
// https://github.com/electron/electron/blob/master/docs/api/browser-window.md
mainWindow.capturePage({
x: 10,
y: 10,
width: 100,
height: 10
}, (data) => {
recognize(data.toPNG()).then(console.log)
})
For Mac OS users, if you are experiencing trouble when compiling, run the following command:
$ xcode-select --install
will resolve most problems.
Warnings:
xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance
resolver:
$ sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
MIT
FAQs
Native Node.js bindings for the Tesseract OCR project.
The npm package node-native-ocr receives a total of 84 weekly downloads. As such, node-native-ocr popularity was classified as not popular.
We found that node-native-ocr demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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Socket now supports Scala and Kotlin, bringing AI-powered threat detection to JVM projects with easy manifest generation and fast, accurate scans.
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