I know that English people use "co-" prefix to show something is "joint" or "jointly Verb" with something else . But I encountered a key sentence in a article and I cannot understand it well:
"we use this classification method to represent images' attributes, and co-indexed images into a new file according to their characteristics"
what the "co-indexed" means in this sentence? An image is jointly indexed with what? I think it should be something like this
X is co-indexed with Y
does it mean that every pair of images is jointly indexed?
The phrase is not a technical one.