javier/Stirling-PDF
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

More Types, Fixed isImageBlank

Browse Source
This commit is contained in:
Felix Kaspar
2023-11-16 01:56:17 +01:00
parent 8f1f64f6c0
commit 921a8c431c
4 changed files with 13 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
shared-operations/src/functions/common/detectEmptyPages.ts
View File

@@ -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;
@@ -43,8 +43,9 @@ async function areImagesBlank(page: PDFPageProxy, threshold: number): Promise<bo
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 }); // TODO: Maybe respect image.kind and convert accordingly, needs to be tested with a pdf with alpha-image
var grey = img.grey();
var mean = grey.getMean();
return mean[0] <= threshold;