Camera rapid exposure method and apparatus, electronic device, and medium

An apparatus for rapid exposure of camera, comprising:

• an adjusting module, configured to adjust an image acquisition frequency and an image acquisition resolution based on a distance to and a volume of a measured object in case that a camera is in a sleep state;
• a cache module directly connected to an output terminal of a sensing unit in a camera through an A/D converter, and configured to cache images acquired by the sensing unit in the sleep state;
• a cache control module, configured to control the sensing unit in the camera to acquire pre-alarm images using an adjusted image acquisition frequency and image acquisition resolution, and output the pre-alarm images to the cache module;
• a determining module, configured to determine a brightness and an exposure factor of a first frame image after startup of the camera is completed based on brightnesses of a plurality frames of pre-alarm images cached by the camera during the sleep state;
• and
• an exposing module, configured to control the camera to expose, after the startup is completed, based on the determined brightness and exposure factor of the first frame image after the startup of the camera is completed.