Image acquisition apparatus and method employing lens array

Abstract

An image acquisition apparatus includes an image sensor including a microlens and a plurality of pixels arranged adjacent to each other and sharing the microlens; and a processor configured to process an input image acquired by the image sensor, wherein the processor may be further configured to: generate a plurality of parallax images by extracting and combining sub-images having a same parallax from the input image; generate RGB demosaic images by interpolating a color value of an empty pixel for each of the plurality of parallax images by using color values of surrounding pixels; generate a plurality of upsampled images by upsampling each of the RGB demosaic images to an input image size; and generate an output image by weighted-summing one upsampled image selected from the upsampled images and the other upsampled images based on a similarity therebetween.