Image device with image defocus function and method generating a defocus image thereof

A method of an image device generating a defocus image, wherein the image device comprises an image capture unit, a depth map generation unit, and a processor, the method comprising:

• the image capture unit capturing an image corresponding to an object;
• the depth map generation unit generating a depth map corresponding to the object;
• the processor determining an integration block corresponding to each pixel image of the image according to a depth corresponding to the each pixel image and a predetermined depth corresponding to the each pixel image, wherein the each pixel image of the image corresponds to a pixel of the image capture unit;
• the processor utilizing the integration block to generate a defocus color pixel value corresponding to the each pixel image;
• and
• the processor outputting a defocus image corresponding to the image according to defocus color pixel values corresponding to all pixel images of the image.