How to change image shape in form of V?

2 次查看（过去 30 天）
h612
h612 2017-4-6
评论： Guillaume 2017-4-6
Filters, such as fisheye filter can shape the image with fisheye distortion. Is there a filter in which the image can look squeezed from bottom and wide from top? Such as a V?

请先登录，再回答此问题。

采纳的回答

Guillaume
Guillaume 2017-4-6
Use imwarp with a projective2d transform:
I = checkerboard(40);
transform = fitgeotrans([1, 1; size(I, 2), 1; 1, size(I, 1); size(I)], ...
[1, 1; size(I, 2), 1; 100, size(I, 1); size(I, 2)-100, size(I, 1)], ...
'projective');
imshowpair(I, imwarp(I, transform), 'montage')
  5 个评论
显示 3更早的评论
h612
h612 2017-4-6
I'm attaching the result. The black region can be seen in the result. I am wondering how can I not have that region 0- infact some interpolation of the neighbouring pixels
Guillaume
Guillaume 2017-4-6
I still have no idea what you want to interpolate in the black region. There is nothing there to interpolate. If you want to smear the edge of the image, you can use the older tformarray with a resampler that 'replicate' values.
transform = maketform('projective', ...
[1, 1; size(I, 2), 1; 1, size(I, 1); size(I)], ...
[1, 1; size(I, 2), 1; 100, size(I, 1); size(I, 2)-100, size(I, 1)]);
resampler = makeresampler('cubic', 'replicate');
imshowpair(I, tformarray(I, transform, resampler, [2 1], [2 1], [], []), 'montage');
However, note that most of these functions are deprecated. I don't know how to do the same with the new imwarp.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Camera Calibration 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by