Image Stitching without external libraries

Can we do image stitching in unity without the use of any external library. I tried using both OpenCVSharp as well as OpenCVforUnity but it crashes at every extensive mat operation (including Mat addition) . Is there a way to perform operations such as image warping and additions on unity's own Texture2D. I came across the Camera Projection Matrix in the scripting API here but I dont know how I should go about it. Any help or pointers would be appreciated. I know the image stitching process and have calculated the homography matrices as well as per this link. and I am facing constant crashes on step 6 which is coincidentally the last step.