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More Types, Fixed isImageBlank

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This commit is contained in:
Felix Kaspar
2023-11-16 01:54:00 +01:00
parent 8f1f64f6c0
commit abf9278b90
4 changed files with 14 additions and 10 deletions
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11
shared-operations/src/functions/common/detectEmptyPages.ts
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@@ -1,9 +1,9 @@
import { PdfFile } from '../../wrappers/PdfFile';
import { PDFPageProxy } from "pdfjs-dist/types/src/display/api.js";
import { Image } from 'image-js';
import { Image, ImageKind } from 'image-js';
import { getImagesOnPage } from "./getImagesOnPage.js";
import { getImagesOnPage, PDFJSImage } from "./getImagesOnPage.js";
export async function detectEmptyPages(file: PdfFile, whiteThreashold: number): Promise<number[]> {
const pdfDoc = await file.pdfJsDocument;
@@ -37,14 +37,15 @@ async function hasText(page: PDFPageProxy): Promise<boolean> {
async function areImagesBlank(page: PDFPageProxy, threshold: number): Promise<boolean> {
const images = await getImagesOnPage(page);
for (const image of images) {
if(!await isImageBlank(image, threshold))
if(!await isImageBlank(image as any, threshold))
return false;
}
return true;
}
async function isImageBlank(image: string | Uint8Array | ArrayBuffer, threshold: number): Promise<boolean> {
var img = await Image.load(image);
// TODO: Fix this function
async function isImageBlank(image: PDFJSImage, threshold: number): Promise<boolean> {
var img = new Image(image.width, image.height, image.data, { kind: "RGB" as ImageKind });
var grey = img.grey();
var mean = grey.getMean();
return mean[0] <= threshold;