@Shohreh
AFAIK, Calibre supports .cbz
Comic book archives. (To create a .cbz file all you have to do is zip up the image folder and change the ending from .zip to .cbz.)
However, since Calibre doesn't support OCR, you'll have to ocr the file afterwards.
AFAIK,
willus's K2pdfopt converter supports image to pdf conversions with OCR. You might want to ask @willus about it in the
k2pdfopt forum.