Generates a depth map through focal stack. Generated depth maps suffer from noise in pixels with a universally low rate of change -- i.e. a solid surface, such as a white wall. This can be mostly eliminated by implementing image segmentation which can constrict the algorithm to sample a certain sequential subset of input images for a given region in the image. Implementing such a segmentation algorithm may be difficult as it would likely rely on an all-in-focus image to properly define segments.