A camera coupled to a microprocessor provides images to a microprocessor, a digital infrared sensor coupled to the microprocessor has ports that provide a digital signal representing a temperature, the microprocessor is operable to receive from the ports the digital signal and the microprocessor is operable to determine a body core temperature from the digital signal and the microprocessor includes a cropper that receives the images from the camera and operable to crop the images to exclude a border area of the images, yielding cropped images, the microprocessor includes a temporal-variation-amplifier of the cropped images that generates a temporal variation, the microprocessor includes a vital-sign generator that is coupled to the temporal-variation-amplifier that generates a vital sign from the temporal variation and the microprocessor is coupled to a display device that displays the vital sign.