Hi Omed,
1) From my experiment, I think you first need a keyword.
2) Then do the search with google images then copy the search url.
3) Use wget to download that url to a text file.
4) Parse the text file to get the image urls (using regular expression
search and looking for imgurl=)
5) Download images from a list of image urls
I think step 4) wget can't do it for you.
So you need to do it manually by writing code to parse the search
result text file.
Best Regards,
Khomsan