From the documentation I previously mentioned, the -O option only extracts images based on their index number within the PDF file, for example:

will save only the first image to directory /tmp.

Read the documentation again, it contains all of the information you need. Since you asked how to extract all of the images within a PDF, you don't need to specify the -O option.

Update: Please pay attention to the part of the documentation which explains that the ImageMagick 'convert' program is a prerequisite.

Hope this helps

Martin

As per your advice i used "extractallimages.pl -O 1 main.pdf /tmp". No error found but image not saved in the tmp path. Could you please help me to solve this problem. I installed "image magic 6.4.0-2 Q16".
And also which option is suitable for to export all images from pdf file.

Thanks,
Prabudass

In reverse order:

"And also which option is suitable for to export all images from pdf file."

I have told you previously that if you don't use the -O option all images will be saved, this is also covered in the documentation which I have asked you to read a couple of times now.

Had you read the documentation, you may have noticed the -v (verbose) option, which will print diagnostic messages. Perhaps you could start by reading the documentation (the implication being that you understand what you are reading) and running the example again with the verbose option enabled. Are you sure that path /tmp is correct? I gave this as an example, but I notice in the first post on this topic that you are running a version of Windows.

A big part of programming is debugging, why not look at the code for extractallimages.pl, examine what it is doing, if you have any messages generated by using the verbose option find out what is causing the problem. For example, can you replicate the call to ImageMagicks convert binary outwith this script?

Martin