This Java sample program uses jOfficeConvert to convert an Excel spreadsheet to a multi page Tiff image.

// Load the document
ExcelDocument ed = new ExcelDocument("input.xlsx", new ExcelConvertOptions());
 
// Save the document as a multi-page TIFF file
ed.saveDocumentAsTIFF("output.tif", new TIFFOptions(150, TIFFOptions.TIFF_FAX_GROUP4));

Download Excel to TIFF Conversion Full Java Program