judging from; based on; from the standpoint of
Used to express a judgment, inference, or viewpoint based on some evidence or perspective. Often follows a noun or clause.
Judging from his demeanor, something good seems to have happened.
Based on the weather forecast, it will probably rain tomorrow.
Compound of particle から (from) and すると (when one does), literally 'when one does from...', grammaticalized as a set expression meaning 'judging from'.