imagesnap

Capture still images from your Mac's camera or video source

brewmacoslinux

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Tool to capture still images from an iSight or other video source

imagesnap

take a photo with the default camera$ imagesnap photo.jpg

list all available cameras on your mac$ imagesnap -l

capture image from a specific camera device$ imagesnap -d "Facetime HD Camera" snapshot.png

take multiple photos with delay between captures$ imagesnap -w 2 frame1.jpg && imagesnap -w 2 frame2.jpg

save camera image as TIFF instead of JPEG$ imagesnap -f tiff image.tiff