Stereo image capturing device

A stereo image capturing device, comprising:

• two image capturing modules, each image capturing module comprising a liquid crystal lens, a voltage drive chip, and an image sensor, wherein the voltage drive chip is configured for applying voltage to the liquid crystal lens for changing a focal distance of the liquid crystal lens, the image sensor is configured for capturing images with at least two kinds of colors;
• a memory;
• a processor;
• and
• an image processing unit being stored in the memory and executable by the processor, the image processing unit comprising:
• a WDF module;
• a focus control module;
• and
• an image synthesize module, the WDF module configured for determining the sharpness of the colors of the images, and acquiring object distance of the images according to the sharpness;
• wherein
• when the object distance is bigger than a predetermined distance, the WDF module modifies the sharpness of the images to get first clear images, and when the object distance is equal to or smaller than the predetermined distance, the WDF module sends the object distance to the focus control module, the focus control module drives the voltage drive chip to change the focal distance of the liquid crystal lens according to the object distance, whereby the image sensor acquires second clear images;
• and wherein the image synthesize module is configured for synthesizing the first clear images to first stereo images, and synthesizing the second clear images to second stereo images.