How to Sampling Uniformly in an image?

1 次查看（过去 30 天）

Berbia 2012-9-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49102-how-to-sampling-uniformly-in-an-image

hi I'm working in Action Recognition Project. Here the motion boundary is detected by sobel operator. Now I have the result of sobel operator, a binary image. I have to take 25% of pixels in motion boundary by uniformly sampling.

Thanks in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst 2012-9-26

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49102-how-to-sampling-uniformly-in-an-image#answer_60029

Try interparc by John D'Errico: http://www.mathworks.com/matlabcentral/fileexchange/34874-interparc

2 个评论
显示无隐藏无

Berbia 2012-9-27

Thanks for ur reply...The concept of interparc is just what I needed. But how can I use it for a binary image(white color indicates the motion boundary, not a proper curve)? I have to plot points on white pixels.How to specify values for px,py..?

Image Analyst 2012-9-27

You can use bwboundaries() to get the coordinates of the outer perimeter of the white objects in your binary image. Then pass those coordinates into interparc().

请先登录，再进行评论。