How to smooth edges of polygons?

11 ビュー (過去 30 日間)
m975
m975 2017 年 10 月 12 日
コメント済み: m975 2017 年 10 月 19 日
I created a image (uint8) with multiple filled polygons. First, I used the vision.ShapeInserter with 'Antialiasing' but this was not enough. Also insertShape + 'SmoothEdges' produced insufficient smooth edges. Are there any other ways how I can fix that?
Looking forward to your suggestions. Thanks!

回答 (2 件)

Andrew Chen
Andrew Chen 2017 年 10 月 12 日
Perhaps imopen with a disk structuring element will provide the functionality you are looking for?
Ex:
se = strel('disk',5);
new_img = imopen(original_image,se);
Hope this helps!
  3 件のコメント
Andrew Chen
Andrew Chen 2017 年 10 月 13 日
Did Image Analyst's answer get you what you wanted? Otherwise, maybe you could clarify what you mean by "smooth edges". What in your mind constitutes a sufficiently smooth edge?
m975
m975 2017 年 10 月 13 日
For example, in this image polygons show proper edges without these awful "stairs" when the shapes get rotated. By the way, this image was drawn in photoshop. But now I have to create a lot of stimuli in MATLAB by using coordinates for my polygons. Consequently, I am looking for a MATLAB routine to generate images of same quality. I hope this explanation helps. Thanks!

サインインしてコメントする。


Image Analyst
Image Analyst 2017 年 10 月 13 日
You can smooth the edges with a filter. See attached.
  8 件のコメント
m975
m975 2017 年 10 月 13 日
I processed the image as follows but it did not work.
level = graythresh(I);
BW = im2bw(I, level);
You can still see these toothed edges:
m975
m975 2017 年 10 月 19 日
Finally, the easiest workaround was to create very big images (5000 x 5000 px) and, subsequently, resize them to the favored stimulus size. Now edges look sexy again!

サインインしてコメントする。

Community Treasure Hunt

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

Start Hunting!

Translated by