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ocr test

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This commit is contained in:
zadam 2023-01-25 15:20:53 +01:00
parent bd8568809f
commit c68a67d148
3 changed files with 372 additions and 1977 deletions
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2318
package-lock.json generated
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3
package.json
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@ -34,6 +34,7 @@
"async-mutex": "0.4.0",
"axios": "1.2.2",
"better-sqlite3": "7.4.5",
"canvas": "2.11.0",
"chokidar": "3.5.3",
"cls-hooked": "4.2.2",
"commonmark": "0.30.0",
@ -69,6 +70,7 @@
"multer": "1.4.5-lts.1",
"node-abi": "3.31.0",
"normalize-strings": "1.1.1",
"ocrad.js": "antimatter15/ocrad.js#master",
"open": "8.4.0",
"pdfjs-dist": "2.8.335",
"rand-token": "1.0.1",
@ -85,7 +87,6 @@
"session-file-store": "1.5.0",
"stream-throttle": "0.1.3",
"striptags": "3.2.0",
"tesseract.js": "^4.0.2",
"tmp": "0.2.1",
"turndown": "7.1.1",
"unescape": "1.0.1",

28
src/services/image.js
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@ -9,10 +9,11 @@ const sql = require('./sql');
const jimp = require('jimp');
const imageType = require('image-type');
const sanitizeFilename = require('sanitize-filename');
const noteRevisionService = require('./note_revisions');
const isSvg = require('is-svg');
const isAnimated = require('is-animated');
const htmlSanitizer = require("./html_sanitizer");
const OCRAD = require('ocrad.js');
const Canvas = require('canvas');
async function processImage(uploadBuffer, originalName, shrinkImageSwitch) {
const compressImages = optionService.getOptionBool("compressImages");
@ -82,7 +83,19 @@ function updateImage(noteId, uploadBuffer, originalName) {
note.save();
note.setContent(buffer);
})
});
const start = Date.now();
const img = new Canvas.Image();
img.src = buffer;
const canvas = new Canvas.createCanvas(img.width, img.height);
const ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0, img.width, img.height);
const text = OCRAD(canvas);
console.log(text);
log.info(`OCR of ${buffer.byteLength} bytes took ${Date.now() - start}ms`);
});
}
@ -146,8 +159,7 @@ async function shrinkImage(buffer, originalName) {
finalImageBuffer = await resize(buffer, jpegQuality);
}
catch (e) {
log.error(`Failed to resize image '${originalName}'
Stack: ${e.stack}`);
log.error(`Failed to resize image '${originalName}', stack: ${e.stack}`);
finalImageBuffer = buffer;
}
@ -164,6 +176,8 @@ Stack: ${e.stack}`);
async function resize(buffer, quality) {
const imageMaxWidthHeight = optionService.getOptionInt('imageMaxWidthHeight');
const start = Date.now();
const image = await jimp.read(buffer);
if (image.bitmap.width > image.bitmap.height && image.bitmap.width > imageMaxWidthHeight) {
@ -178,7 +192,11 @@ async function resize(buffer, quality) {
// when converting PNG to JPG we lose alpha channel, this is replaced by white to match Trilium white background
image.background(0xFFFFFFFF);
return await image.getBufferAsync(jimp.MIME_JPEG);
const resultBuffer = await image.getBufferAsync(jimp.MIME_JPEG);
log.info(`Resizing image of ${resultBuffer.byteLength} took ${Date.now() - start}ms`);
return resultBuffer;
}
module.exports = {