1. A method of extracting a sky portion, comprising: receiving a plurality of images, the plurality of images time-sequenced and the plurality of images each comprising a plurality of corresponding data elements, wherein the plurality of corresponding data elements each share a same position among the plurality of images; identifying a plurality of candidate data elements among the plurality of corresponding data elements of each image among the plurality of images based on color values; identifying a plurality of second type of data elements among the plurality of corresponding data elements of each image among the plurality of images by an edge detector; determining a first number of images among the plurality of images, wherein a corresponding data element is identified as a candidate data element among the plurality of candidate data elements of each of the first number of images; determining a second number of images among the plurality of images, wherein the corresponding data element is identified as a second type of data element among the plurality of second type of data elements of each of the second number of images; determining that the corresponding data element is a first type of data element in response to a first determination that the first number of images is greater than a first threshold and a second determination that the second number of images is greater than a second threshold; and generating a representative of the plurality of images based on a plurality of determined first type of data elements, the representative comprising at least a set of neighbouring first type of data elements among the plurality of determined first type of data elements indicative of at least a sky component.