Method and device for switching between cameras, and terminal

A terminal, comprising:

• one or more of following components:
• a housing, at least a first camera and a second camera, a processor, a memory, a power circuit, and a communication component, wherein the cameras, the processor, the memory, the power circuit and the communication component are arranged in a space enclosed by the housing;
• the power circuit is configured to provide power for respective circuits or components of the terminal;
• the memory is configured to store executable program codes;
• the processor is configured to run a program corresponding to the executable program codes by reading the executable program codes stored in the memory, to perform following operations:
• when the first camera is currently used and it is determined that a current zoom factor satisfies a first switching condition for switching the first camera to the second camera, obtaining current illumination via the first camera currently used;
• under a same illumination condition to that of the current illumination obtained by the first camera, calculating illumination sensed by the second camera based on an aperture size of the second camera, a shutter time of the second camera and a sensitivity parameter of the second camera;
• determining whether the illuminance sensed by the second camera is greater than illumination required by the second camera;
• and
• when the illuminance sensed by the second camera is greater than the illumination required by the second camera, switching from the first camera to the second camera.

A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a terminal, causes the terminal to perform a method for switching between cameras, the method comprising:

• when a first camera is currently used and it is determined that a current zoom factor satisfies a first switching condition for switching the first camera to the second camera, obtaining current illumination via the first camera currently used;
• under a same illumination condition to that of the current illumination obtained by the first camera, calculating illumination sensed by the second camera based on an aperture size of the second camera, a shutter time of the second camera and a sensitivity parameter of the second camera;
• determining whether the illuminance sensed by the second camera is greater than illumination required by the second camera;
• and
• when the illuminance sensed by the second camera is greater than the illumination required by the second camera, switching from the first camera to the second camera.