Chameleons should not be sleeping on things like couches, which that's what it looks like hes on, they usually do not feel comfortable and safe. Especially during the day, this could mean he is sick. I see you are a new member so I highly reccomend you making a thread and fill out the health form.
This is definitly concerning, chameleons should not be sleeping durning the day, which is the sign of a health problem, sickness. Also, definitly on furniture. Please let us assist you in husbandry.