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QRCode Detection working.

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This commit is contained in:
Felix Kaspar
2023-10-27 02:56:13 +02:00
parent 4e8d8e3d53
commit dd14b3a773
8 changed files with 4826 additions and 291 deletions
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15
public/functions/shared/detectEmptyPages.js
View File

@@ -1,3 +1,5 @@
import { getImagesOnPage } from "./getImagesOnPage.js";
export async function detectEmptyPages(snapshot, whiteThreashold, PDFJS, OpenCV) {
const pdfDoc = await PDFJS.getDocument(snapshot).promise;
@@ -27,15 +29,10 @@ export async function detectEmptyPages(snapshot, whiteThreashold, PDFJS, OpenCV)
}
async function areImagesBlank(page, threshold) {
const ops = await page.getOperatorList();
for (var j=0; j < ops.fnArray.length; j++) {
if (ops.fnArray[j] == PDFJS.OPS.paintJpegXObject || ops.fnArray[j] == PDFJS.OPS.paintImageXObject) {
const image = page.objs.get(ops.argsArray[j][0]);
if(image.data) {
return isImageBlank(image, threshold);
}
}
const images = getImagesOnPage(page, PDFJS);
for (const image of images) {
if(!isImageBlank(image, threshold))
return false;
}
return true;
}

11
public/functions/shared/getImagesOnPage.js Normal file
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@@ -0,0 +1,11 @@
export async function getImagesOnPage(page, PDFJS) {
const ops = await page.getOperatorList();
const images = [];
for (var j=0; j < ops.fnArray.length; j++) {
if (ops.fnArray[j] == PDFJS.OPS.paintJpegXObject || ops.fnArray[j] == PDFJS.OPS.paintImageXObject) {
const image = page.objs.get(ops.argsArray[j][0]);
images.push(image);
}
}
return images;
}