Filtering a 2D plot from pcolor

Question

Marcus Rosales 2020-8-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/583922-filtering-a-2d-plot-from-pcolor

评论： Marcus Rosales 2020-8-29

up.png

Hello, just wondering what a good way to filter a plot obtained from a matrix of values, M, when using pcolor(m) with shading interp.

I attached a png of what I have. There seems to be good filters but for grey scale and I want to keep the color scheme shown. Any help would be appreciated! Been on this project for sometime and it turns out my math, physics and code is ok, and it all has to do with filtering the signal.

2 个评论
显示无隐藏无

Image Analyst 2020-8-24

Uh, you do know that there are a bazillion ways to filter an image or array, don't you? What filter are you thinking of? Enhance edges? Blur it? Remove noise? Clip values? Erase values? There is no generic mind-reading filter.

Marcus Rosales 2020-8-24

To remove noise. Honestly the snarky answer is not needed! I am not an expert in matlab and in my field of study (physics) filter means exactly this.... I accidentally used jargon I am used to.

The purpose of the forum is to help; I was not born knowing all the filters in matlab. I've been on java, c, and python forums and for whatever reason mathworks takes the cake for condescending answers. Thanks for making this a toxic environment!

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Kiran Felix Robert 2020-8-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/583922-filtering-a-2d-plot-from-pcolor#answer_486266

Hi Marcus,

Refer to the documentation of imfilter and fspecial functions for filtering Color images.

Also refer to this document for a use case.

Kiran Felix Robert

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Marcus Rosales 2020-8-29

Screenshot from 2020-08-29 10-24-18.png

Hi Kiran,

I took a look at these, but they seemed to blur rather than make the image sharper.

I can give a quick eample of something I already did. I attached a screen shot of a spectral function; all you need to see is how noisy the original one was (small plot). I used a Guassian filter to smooth out the plot so that I get a resonably well behaved curve (big plot).

I believe my 2D plot is suffering a similar problem. Is there a filter more inline with this?

Thanks!

请先登录，再进行评论。

Filtering a 2D plot from pcolor

2 个评论
显示无隐藏无

回答（1 个）

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

另请参阅

类别

标签

Community Treasure Hunt

Filtering a 2D plot from pcolor

2 个评论 显示 无隐藏 无

回答（1 个）

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

另请参阅

类别

标签

Community Treasure Hunt

2 个评论
显示无隐藏无

1 个评论
显示 -1更早的评论隐藏 -1更早的评论