Patent ID: 8704906

Claim:
A mobile phone terminal with a camera function, comprising: a camera hardware section including an image sensor and a camera lens for capturing an image; an instruction input section configured to input a user instruction to start image capturing; an illumination sensor which is arranged on an outer surface of a housing near an area where the camera lens is arranged and detects an ambient illumination value while a mobile phone function is activated; and an image capturing start control section configured to start at least camera driver software in the camera hardware section and to thereafter set, in response to a user input, the at least camera driver software in the camera hardware section into a standby state in which power is consumed by the camera driver software while the mobile phone function is activated and at least one other driver or hardware used for the camera function but not necessary for image capturing to a state in which no power is consumed, wherein when an instruction to start image capturing is inputted from the instruction input section, the image capturing start control section is configured to determine an exposure value, which is used when the camera hardware section performs image capturing, by using the illumination value detected by the illumination sensor, restore the camera driver software, cause the camera hardware section to perform image capturing using the exposure value, and correct white balance of an image signal obtained by the image capturing after the image is captured, and wherein the exposure value is determined from a correspondence table between illuminance and exposure prepared in advance based on the illumination value detected by the illumination sensor such that the exposure value is determined from the correspondence table after the camera driver software exits the standby state and before any images are initially captured.