[CentOS] centos rpm package description list?

Dear All Is there any reference link that lists the centos rpm packages by their description? As I know, we have reference sites like rpm.pbone.net and dag.wieers.com etc that we can search for an rpm package by its name. But what we have if we want to find a rpm package by its description rather than its name? Say we want to find how many solutions do we have for Image processing or Speech processing on centos, so if we know the solution is GIMP so we can search for its rpm package on the mentioned sites but what we can do if we just know the rpm package description? Thank you