This repository uses perspective transformation to replace a portion of an existing image with an alternate image.
dlt_homography.m computes the perspective homography between two images, given four point correspondences.
bilinear_interp.m performs bilinear interpolation to produce a pixel intenxity value, given an image and a subpixel location (point)
histogram_eq.m performs discrete historgram equilization on the input image (which is 8-bit and greyscale)
billboard_hack.m uses the above functions to create the composite image, which is stored in colour