Patent ID: 8294780

Claim:
A portable electronic device, comprising: a main body; a plurality of camera modules accommodated in the main body and exposed to an environment of the portable electronic device; a storage unit; a display received in the main body and exposed to the environment of the portable electronic device; and an image processing unit; wherein the camera modules have different focal lengths from each other, are configured for simultaneously picking up images of an object, and comprise a first camera module and a second camera module, and the depths of field (DOFs) of the first and second camera modules are selected from the group consisting of infinity to 60 centimeters (cm), 40 cm to 20 cm, and 20 cm to 10 cm; the image processing unit is electrically connected to the camera modules, and is configured for comparing the modulation transfer function (MTF) values of the two images captured by the first camera module and the second camera module, and transmitting data of the image having the greatest MTF value to the storage unit; the storage unit is electrically connected to the image processing unit and the display, and is configured for storing the data of the image having the greatest MTF value, and transferring the data of the image having the greatest MTF value to the display; and the display is capable of displaying only the image having the greatest MTF value.