Calculating the Minimum and The Maximum of a Slidig Window

2014 4 23
2 个回答
回答已采纳
更新时间：2014 9 11
24 次查看（30 天）

0 个投票

Hello,
How would you create the fastest implementation to extract the Minimum and the Maximum of a Local Sliding Window over an image?
So far I used this:
localMaxImage = colfilt(inputImage, [winLength winLength], 'sliding', @max);
localMinImage = colfilt(inputImage, [winLength winLength], 'sliding', @min);
Yet it is really slow. I know I can use `imerode` and `imdilate`, Yet I'm looking for a toolbox free implementation. Thank You.

2 个评论
显示 无 隐藏 无

José-Luis
José-Luis 2014-9-8
编辑：Image Analyst 2014-9-11
Royi, you have asked 23 questions in this forum so far and not accepted a single one. Have you had bad luck with your answers? If not, seeing that might make contributors here less inclined to help you.
Royi Avital
Royi Avital 2014-9-8
Well, I guess as you see, I don't remember getting the right answer. You may look at my profile in StackExchange, I accept more than 80% of answers.
Anyhow, When I try answering someone, I never look at that. We're not trying to get scored, we're trying to assist people and build well organized information source.

请先登录，再进行评论。

请先登录，再回答此问题。

更多回答（1 个）

Anand
Anand 2014-9-11

0 个投票

What do you mean toolbox-free? colfilt is also from the Image Processing Toolbox. Can you use ordfilt2
localMaxImage = ordfilt2(inputImage, winLength^2, true(winLength));
localMinImage = ordfilt2(inputImage, 1 , true(winLength));
This should be faster than colfilt, but maybe you can't use it.

类别

在 帮助中心 和 File Exchange 中查找有关 Image Arithmetic 的更多信息

产品

标签

Community Treasure Hunt

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

Start Hunting!

Translated by