stitching with DLT

Quick testing with direct linear transformation. The result is better than affine transformation. I guess it`s time to use bundle adjustment.

SIFT with up scale

without up scale :

with up scale :

Up scaling provide about 50% matched features. Now I have to work on memory & cpu usage balance.

Affine Stitching

After adding hat function, clamping descriptor and remap float to u8, I got better result. The paper weighted each bin in descriptor with 1 - d. I don`t know why I can`t get better result. But clamp magnitude to 0.01 ~ 0.99 works fine in my implementation.

I can`t wait to try this ! So I made a simple implementation to stitch image : SIFT + Affine + RANDSAC + SVD. Replace affine model should get better result, I will try it later.

Line Rasterization

SIFT in real scene

My implementation is still not as robust as imagination. This is one of my better test.