mrgloom's profile - activity

I can't add links, maybe moderator edit my qestion.

TPS_L2 no guess http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/TPS_L2_no_guess.png TPS_L2 initial guess http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/TPS_L2_initial_guess.png

rigid scale rotate shift http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/rigid%3Dscale_rotate_shift_noise.png

but it fails on real problem, maybe I don't set constraints/bounds or initial guess well. real data rigid shift http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/rigid_no_guess.png

barrel-barrel backwards-barrel rigid http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/barrel_test.png http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/barrel_test_back.png http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/barrel_test_rigid.png

for example affine http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/%D0%B0%D1%84%D0%B8%D0%BD%D0%BD%D0%BE%D0%B5.png http://dl.dropbox.com/u/8841028/ICP/gmmreg_tests/%D1%82%D1%80%D0%B0%D0%BF%D0%B5%D1%86%D0%B8%D1%8F.png

Hello, I have raster and vector data represented as point clouds in 2d. Raster data extracted as contours so it contain some noise. Raster and vector data slightly differs in scale and position,raster data can also have some small perspective distortion and barrel distortion, but I can provide initian alignment. I want to raster data "converged" to unchangeble vector data, so I think I want some kind of non-rigid point cloud matching. By alignment of 2 point clouds then I want to determine some parameters(maybe TPS spline?) and unwarp raster image and then draw vector image above it.

For example if we use homography matrix and assume perspective transform we have 8 parameters. I tried to use KCReg it use some specific metric for point clouds, but it give me unsatisfactory results because my distortion can be only roughly expressed by perspective transform and I need some more non-rigid alignment. So the task consist of some function E(p)(metric)+minimizer+bounds for minimizer. I also tried gmmerg. I seems it uses some Broyden Fletcher Goldfarb Shannon minimization from VNL, but I managed to achive good results only for simple tasks.