PDFを画像に変換

する方法

terminal

Deno

TerminalでPDFを画像に変換する外部コマンドを呼び出す

web browser (firefox)

code:script.ts

type Option = {

extension: 'ppm' | 'pbm' | 'pgm' | 'png' | 'jpeg' | 'tiff';

verbose?: boolean;

};

export async function convertPDFtoImage(pdfFileName: string, outputName: string, {extension, verbose}: Option = {extension: 'png'}) {

if (verbose) console.log(Converting ${pdfFileName} to ${extension} images...);

let flag: string | undefined;

switch (extension) {

case 'ppm':

flag = undefined;

break;

case 'pbm':

flag = 'mono';

break;

case 'pgm':

flag = 'gray';

break;

default:

flag = extension;

break;

}

await exec(pdftoppm${flag ? -${flag} : ''} ${pdfFileName} ${outputName} -r ${dpi});

if (verbose) console.log(Finish.);

}