CSE490CV – Project2 : Panoramic Mosaic Stitching
I
made following panoramas for Project2.
Test sequence : Hub lawn (UW)
Kaidan head sequence 1 : Drumheller Fountain (UW)
Kaidan head sequence 2 : Drumheller Fountain (UW) at night
Hand-held sequence : near my house
Everything
works fine : cylindrical warpings, image alignments (Lukas-Kanade +
correlation), and blending images.
Stitched
images by Kaidan head sequence are aligned very well. However, stitched image
by hand-held sequence has some problems.
Exposure difference : exposure
differences between consecutive images cause fluctuations of colors, and make
it difficult to align images. I tried to correct exposure differences. Detailed
description is here.
Blend images : I tried 3
functions for blending – linear (hat) function, Gaussian type function, and Hanning
window. Among them, Hanning window works better than others for me.
Hand-held sequence : Quality of
stitched image by hand-held sequence is not good. I think some numbers for
warping is not exactly matched. Kaidan head images are taken for 480x640, but
hand-held images are taken for 640x480. Object far from camera is well focused
and well aligned, but object near the camera is not aligned well. Addition to
this, some rotational factors make it difficult to align images. This can be
further studied.