From c8eacb99425e00f99172db0413095e7a226450c0 Mon Sep 17 00:00:00 2001 From: Sean Marpo Date: Fri, 9 Sep 2022 14:45:06 -0700 Subject: [PATCH] Linting fixes --- .../OpticalCharacterRecognition.mjs | 303 +++++++++--------- 1 file changed, 151 insertions(+), 152 deletions(-) diff --git a/src/core/operations/OpticalCharacterRecognition.mjs b/src/core/operations/OpticalCharacterRecognition.mjs index 3b3f87ed..2e21338b 100644 --- a/src/core/operations/OpticalCharacterRecognition.mjs +++ b/src/core/operations/OpticalCharacterRecognition.mjs @@ -6,155 +6,154 @@ * @license Apache-2.0 */ - import Operation from "../Operation.mjs"; - import OperationError from "../errors/OperationError.mjs"; - import { isImage } from "../lib/FileType.mjs"; - import { toBase64 } from "../lib/Base64.mjs"; - import { isWorkerEnvironment } from "../Utils.mjs"; - - import { createWorker } from "tesseract.js"; - - /** - * Optical Character Recognition operation - */ - class OpticalCharacterRecognition extends Operation { - - /** - * OpticalCharacterRecognition constructor - */ - constructor() { - super(); - - this.name = "Optical Character Recognition"; - this.module = "OCR"; - this.description = "Optical character recognition or optical character reader (OCR) is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text.

Supported image formats: png, jpg, bmp, pbm."; - this.infoURL = "https://wikipedia.org/wiki/Optical_character_recognition"; - this.inputType = "ArrayBuffer"; - this.outputType = "string"; - this.args = [ - { - name: "Show confidence", - type: "boolean", - value: true - }, - { - name: "Language", - type: "editableOptionShort", - value: [ - { name: "Afrikaans", value: "afr" }, - { name: "Arabic", value: "ara" }, - { name: "Azerbaijani", value: "aze" }, - { name: "Belarusian", value: "bel" }, - { name: "Bengali", value: "ben" }, - { name: "Bulgarian", value: "bul" }, - { name: "Catalan", value: "cat" }, - { name: "Czech", value: "ces" }, - { name: "Chinese", value: "chi_sim" }, - { name: "Traditional Chinese", value: "chi_tra" }, - { name: "Cherokee", value: "chr" }, - { name: "Danish", value: "dan" }, - { name: "German", value: "deu" }, - { name: "Greek", value: "ell" }, - { name: "English", value: "eng" }, - { name: "English (Old)", value: "enm" }, - { name: "Internet Meme", value: "meme" }, - { name: "Esperanto", value: "epo" }, - { name: "Esperanto alternative", value: "epo_alt" }, - { name: "Estonian", value: "est" }, - { name: "Basque", value: "eus" }, - { name: "Finnish", value: "fin" }, - { name: "French", value: "fra" }, - { name: "Frankish", value: "frk" }, - { name: "French (Old)", value: "frm" }, - { name: "Galician", value: "glg" }, - { name: "Ancient Greek", value: "grc" }, - { name: "Hebrew", value: "heb" }, - { name: "Hindi", value: "hin" }, - { name: "Croatian", value: "hrv" }, - { name: "Hungarian", value: "hun" }, - { name: "Indonesian", value: "ind" }, - { name: "Icelandic", value: "isl" }, - { name: "Italian", value: "ita" }, - { name: "Italian (Old)", value: "ita_old" }, - { name: "Japanese", value: "jpn" }, - { name: "Kannada", value: "kan" }, - { name: "Korean", value: "kor" }, - { name: "Latvian", value: "lav" }, - { name: "Lithuanian", value: "lit" }, - { name: "Malayalam", value: "mal" }, - { name: "Macedonian", value: "mkd" }, - { name: "Maltese", value: "mlt" }, - { name: "Malay", value: "msa" }, - { name: "Dutch", value: "nld" }, - { name: "Norwegian", value: "nor" }, - { name: "Polish", value: "pol" }, - { name: "Portuguese", value: "por" }, - { name: "Romanian", value: "ron" }, - { name: "Russian", value: "rus" }, - { name: "Slovakian", value: "slk" }, - { name: "Slovenian", value: "slv" }, - { name: "Spanish", value: "spa" }, - { name: "Old Spanish", value: "spa_old" }, - { name: "Albanian", value: "sqi" }, - { name: "Serbian (Latin)", value: "srp" }, - { name: "Swahili", value: "swa" }, - { name: "Swedish", value: "swe" }, - { name: "Tamil", value: "tam" }, - { name: "Telugu", value: "tel" }, - { name: "Tagalog", value: "tgl" }, - { name: "Thai", value: "tha" }, - { name: "Turkish", value: "tur" }, - { name: "Ukrainian", value: "ukr" }, - { name: "Vietnamese", value: "vie" }, - ], - defaultIndex: 14 - } - ]; - } - - /** - * @param {ArrayBuffer} input - * @param {Object[]} args - * @returns {string} - */ - async run(input, args) { - const [showConfidence, language] = args; - - if (!isWorkerEnvironment()) throw new OperationError("This operation only works in a browser"); - - const type = isImage(input); - if (!type) { - throw new OperationError("Unsupported file type (supported: jpg,png,pbm,bmp) or no file provided\nOpen an image as input using the toolbar."); - } - - try { - self.sendStatusMessage("Spinning up Tesseract worker..."); - const image = `data:${type};base64,${toBase64(input)}`; - const worker = createWorker({ - logger: progress => { - if (isWorkerEnvironment()) { - self.sendStatusMessage(`Status: ${progress.status}${progress.status === "recognizing text" ? ` - ${(parseFloat(progress.progress)*100).toFixed(2)}%`: "" }`); - } - } - }); - await worker.load(); - self.sendStatusMessage(`Loading ${language} language pack...`); - await worker.loadLanguage(language); - self.sendStatusMessage("Intialising Tesseract API..."); - await worker.initialize(language); - self.sendStatusMessage("Finding text..."); - const result = await worker.recognize(image); - - if (showConfidence) { - return `Confidence: ${result.data.confidence}%\n\n${result.data.text}`; - } else { - return result.data.text; - } - } catch (err) { - throw new OperationError(`Error performing OCR on image. (${err})`); - } - } - } - - export default OpticalCharacterRecognition; - \ No newline at end of file +import Operation from "../Operation.mjs"; +import OperationError from "../errors/OperationError.mjs"; +import { isImage } from "../lib/FileType.mjs"; +import { toBase64 } from "../lib/Base64.mjs"; +import { isWorkerEnvironment } from "../Utils.mjs"; + +import { createWorker } from "tesseract.js"; + +/** + * Optical Character Recognition operation + */ +class OpticalCharacterRecognition extends Operation { + + /** + * OpticalCharacterRecognition constructor + */ + constructor() { + super(); + + this.name = "Optical Character Recognition"; + this.module = "OCR"; + this.description = "Optical character recognition or optical character reader (OCR) is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text.

Supported image formats: png, jpg, bmp, pbm."; + this.infoURL = "https://wikipedia.org/wiki/Optical_character_recognition"; + this.inputType = "ArrayBuffer"; + this.outputType = "string"; + this.args = [ + { + name: "Show confidence", + type: "boolean", + value: true + }, + { + name: "Language", + type: "editableOptionShort", + value: [ + { name: "Afrikaans", value: "afr" }, + { name: "Arabic", value: "ara" }, + { name: "Azerbaijani", value: "aze" }, + { name: "Belarusian", value: "bel" }, + { name: "Bengali", value: "ben" }, + { name: "Bulgarian", value: "bul" }, + { name: "Catalan", value: "cat" }, + { name: "Czech", value: "ces" }, + { name: "Chinese", value: "chi_sim" }, + { name: "Traditional Chinese", value: "chi_tra" }, + { name: "Cherokee", value: "chr" }, + { name: "Danish", value: "dan" }, + { name: "German", value: "deu" }, + { name: "Greek", value: "ell" }, + { name: "English", value: "eng" }, + { name: "English (Old)", value: "enm" }, + { name: "Internet Meme", value: "meme" }, + { name: "Esperanto", value: "epo" }, + { name: "Esperanto alternative", value: "epo_alt" }, + { name: "Estonian", value: "est" }, + { name: "Basque", value: "eus" }, + { name: "Finnish", value: "fin" }, + { name: "French", value: "fra" }, + { name: "Frankish", value: "frk" }, + { name: "French (Old)", value: "frm" }, + { name: "Galician", value: "glg" }, + { name: "Ancient Greek", value: "grc" }, + { name: "Hebrew", value: "heb" }, + { name: "Hindi", value: "hin" }, + { name: "Croatian", value: "hrv" }, + { name: "Hungarian", value: "hun" }, + { name: "Indonesian", value: "ind" }, + { name: "Icelandic", value: "isl" }, + { name: "Italian", value: "ita" }, + { name: "Italian (Old)", value: "ita_old" }, + { name: "Japanese", value: "jpn" }, + { name: "Kannada", value: "kan" }, + { name: "Korean", value: "kor" }, + { name: "Latvian", value: "lav" }, + { name: "Lithuanian", value: "lit" }, + { name: "Malayalam", value: "mal" }, + { name: "Macedonian", value: "mkd" }, + { name: "Maltese", value: "mlt" }, + { name: "Malay", value: "msa" }, + { name: "Dutch", value: "nld" }, + { name: "Norwegian", value: "nor" }, + { name: "Polish", value: "pol" }, + { name: "Portuguese", value: "por" }, + { name: "Romanian", value: "ron" }, + { name: "Russian", value: "rus" }, + { name: "Slovakian", value: "slk" }, + { name: "Slovenian", value: "slv" }, + { name: "Spanish", value: "spa" }, + { name: "Old Spanish", value: "spa_old" }, + { name: "Albanian", value: "sqi" }, + { name: "Serbian (Latin)", value: "srp" }, + { name: "Swahili", value: "swa" }, + { name: "Swedish", value: "swe" }, + { name: "Tamil", value: "tam" }, + { name: "Telugu", value: "tel" }, + { name: "Tagalog", value: "tgl" }, + { name: "Thai", value: "tha" }, + { name: "Turkish", value: "tur" }, + { name: "Ukrainian", value: "ukr" }, + { name: "Vietnamese", value: "vie" }, + ], + defaultIndex: 14 + } + ]; + } + + /** + * @param {ArrayBuffer} input + * @param {Object[]} args + * @returns {string} + */ + async run(input, args) { + const [showConfidence, language] = args; + + if (!isWorkerEnvironment()) throw new OperationError("This operation only works in a browser"); + + const type = isImage(input); + if (!type) { + throw new OperationError("Unsupported file type (supported: jpg,png,pbm,bmp) or no file provided\nOpen an image as input using the toolbar."); + } + + try { + self.sendStatusMessage("Spinning up Tesseract worker..."); + const image = `data:${type};base64,${toBase64(input)}`; + const worker = createWorker({ + logger: progress => { + if (isWorkerEnvironment()) { + self.sendStatusMessage(`Status: ${progress.status}${progress.status === "recognizing text" ? ` - ${(parseFloat(progress.progress)*100).toFixed(2)}%`: "" }`); + } + } + }); + await worker.load(); + self.sendStatusMessage(`Loading ${language} language pack...`); + await worker.loadLanguage(language); + self.sendStatusMessage("Intialising Tesseract API..."); + await worker.initialize(language); + self.sendStatusMessage("Finding text..."); + const result = await worker.recognize(image); + + if (showConfidence) { + return `Confidence: ${result.data.confidence}%\n\n${result.data.text}`; + } else { + return result.data.text; + } + } catch (err) { + throw new OperationError(`Error performing OCR on image. (${err})`); + } + } +} + +export default OpticalCharacterRecognition;