Detecting particular Line(EDGE) in the total image

2011 10 19
3 个回答
7 次查看（30 天）

0 个投票

I tried a lot to detect the line(EDGE) which is in red portion in the linked image http://tinypic.com/r/2qntaip/7
But was able to get the small line segments not the full line as in image.. Can anyone help me finding out the full line

请先登录，再回答此问题。

回答（3 个）

Image Analyst
Image Analyst 2011-10-19

1 个投票

Well you're in luck because two other people are working on the very same project. They are
Joseph: http://www.mathworks.com/matlabcentral/answers/18447-extracting-frequency-components-of-line-in-a-image
and Naga Ponduru: http://www.mathworks.com/matlabcentral/answers/18685-how-to-find-spatial-wave-length-or-spatial-frequency-for-this-image
Hopefully those two can help you. With three of you on it now, it shouldn't be too hard.

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Gova ReDDy
Gova ReDDy 2011-10-20
After peforming some operations I was able to get this image
http://tinypic.com/view.php?pic=dwfjop&s=7
After that I worked out to remove the unwanted lines using ''imerode'' but as my required line itself consisting of line segments I was unable to go further...
Can anyone suggests how to detect this line as shown in the image
http://tinypic.com/view.php?pic=ad1zn&s=7
Image Analyst
Image Analyst 2011-10-20
Did you contact Joseph and Naga Ponduru?
Gova ReDDy
Gova ReDDy 2011-10-20
Thanks for your valuable suggestion ..And we need to do it in different methods....
Image Analyst
Image Analyst 2011-10-23
Why? Why is that a need??? Aren't you all working on the same project in your company and you just need to get it solved no matter how? Or is this a classroom assignment that you're not allowed to collaborate on? Or, are you actually all three people?

请先登录，再进行评论。

Artik Crazy
Artik Crazy 2011-10-19

0 个投票

Try hough transform as in this example:
http://www.mathworks.com/help/toolbox/images/ref/hough.html

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Gova ReDDy
Gova ReDDy 2011-10-20
I think Hough transform detects the lines And the line I wanted to display is at an angle of -45 degrees.So I want to display this particular line only(making the other parts invisible) in the image.

请先登录，再进行评论。

Gova ReDDy
Gova ReDDy 2011-10-22

0 个投票

I used filtering with kernel of -45 degree lines and result image is
<http://tinypic.com/view.php?pic=ad1zn&s=7>
After this I worked out with imerode with strel('line',10,-45) which resulted in the discontinuties in the required line like this
http://tinypic.com/r/59sx9u/7
Can someone pls guide me something about how to get the full required line

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Walter Roberson
Walter Roberson 2011-10-23
imerode is used to _remove_ information. Unless you flip black and white and then use imerode to erode what is currently the black, you are not going to be extending connecting the white parts, just throwing them away.

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Object Analysis 的更多信息

产品

标签

提问:

Gova ReDDy
Gova ReDDy
2011-10-19

Community Treasure Hunt

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

Start Hunting!

Translated by