gistfile1.js

total_pages = 68;
full_document_path = "~/Project/Assets/catalog.pdf";
full_output_path = "~/Project/Assets/jpg/";

function open_document(page) {
    FileReference = new File(full_document_path);
    PDFOpenOptions = new PDFOpenOptions();  
    PDFOpenOptions.page = page;
    PDFOpenOptions.resolution = 72;
    app.open(FileReference, PDFOpenOptions);
}

function save_document(page) {
    jpgFile = new File(full_output_path + page + ".jpeg");
    jpgSaveOptions = new JPEGSaveOptions();
    jpgSaveOptions.embedColorProfile = true;
    jpgSaveOptions.quality = 12;
    app.activeDocument.saveAs(jpgFile, jpgSaveOptions, true, Extension.LOWERCASE);
}

function close_document() {
    app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
}

for (i=1; i<=total_pages; i++) {
    open_document(i);
    save_document(i);
    close_document();
}