I combine funny photos
Very cool and very fun. I took a bunch of photos here so this is all my data. Some of these photos might have to be downsized because they were actually quite large... Additionally, I took a lot of planar photos because I was unsure of my ability to become a tripod with my not good camera (phone) that I can't control the exposure/settings of.
So.. basically the way this happens is that we take our src points and our dst points and we do a bunch of math such that we solve for the following equation
We want to solve for a - h in the matrix H so we can set up a really big system of equations to do so.
Now we have matrix A and a vector h and the output b (which is just the dst points vectorized). So how do we solve this?? We can use SVD but I did not. I used least squares which ends up looking like the following.
So here the matrix A is still our matrix of those equations, b is the same b stated above, but we can solve for x! x is effectively a vector that is all the components of our homography matrix. We can then reshape this vector so it fits a 3x3 shape (we append 1 for i in the first image).
So now I made a function that takes an image and a homography matrix H and warps that image to whatever destination was used to calculate H. This is nice because we can rectify images now. Something is not straight or at a weird angle?? Worry no further because now we can rectify images.
Harken back to my digitized photos. We will hone in on the keyboard and my roomate's cheatsheet.
So now I know that my homography is probably okay. Now we can make very cool photos. Have you ever taken 1 photo but actually wanted it to be bigger? yeah me neither but anyways this is something that can let us do just that. I took a bunch of planar scenes (because I am a bad tripod I found out). I stitched them together and feathered the edges so it doesn't look super gross (however the change in lighting still made it kind of gross). boom we have 1 really big picture now!!!
That last one is just to prove that I can stitch more than 2 images together. :^) Something that would be fun is to do this with a panorama. However, my human tripoding skills are not very good so that is something we will shelve for the next part of the project.
for the first time... i did not do any i am already 2 days late ): if someone donates a tripod i can take a stab at some cool stuff though
Not going to lie I was losing what is left my of sanity doing this project. Maybe I am a stronger person because of it. I think something that obviously is important is the actual images you end up taking. I don't have any fancy DSLR camera or anything, and certainly no tripod so honestly it was a little hard to get pictures to work the way I wanted. I think something that was very cool is that I think this is basically what those scanning apps do when you can choose the corners (or sometimes it is auto chosen which is the next part!!!!!!) and then ur bad photo of your homework suddenly looks like homework. Makes me wonder though why these apps charge actual money for this mere system of equations.
I took all the photos. Thanks to my roommate for letting me take a picture of her notes though. Additinally, there are many places in my code where I derived inspiration from, like stackoverflow articles and asking friends for advice on what I was generally supposed to be doing/getting started.